Nabble - SPSSX Discussion

Re: Logistic Regression - Threshold effect sizes?

2008-09-05T16:31:09Z

Dummy variables are only partially useful in the case of Jon, because they
do not necessarily generate ordered results (as expected).
Jon: to create dummy variables in general you simply create one dummy with
values (0,1) for each category minus one. The omitted category is omitted
because it can be deduced from the rest. General syntax for one category:
COMPUTE DUMMYCAT3=(yourvar=3).
The new variable, DUMMYCAT3, will equal 1 whenever your original variable
YOURVAR equals 3, and will equal 0 otherwise. Repeat this for all categories
except one (for instance, you may choose the first or last category for
omission).
However, if you have represented your 5-category variables by four dummies
each, you are not guaranteed to obtain monotonic results, i.e. that the
effect increases or decreases in a monotonic way (by equal or different
amounts) for each increase in the ordinal response from 1 to 5. You may well
find that the effect increases for category 1 and 3, but decreases for
category 2 and 4, which could be incomprehensible from a theoretical point
of view and may be a random effect of your sample.
You can create "incremental dummies" by assigning the value 1 to cases
having one value OR LESS:
COMPUTE UPTOONE=(YOURVAR=1).
COMPUTE UPTOTWO=(YOURVAR LE 2).
COMPUTE UPTOTHREE=(YOURVAR LE 3).
COMPUTE UPTOFOUR=(YOURVAR LE 4).
(it is not necessary to create UPTO FIVE, because people choosing category
five can be deduced as the complement of UPTOFOUR).
The increase (or decrease) in the effect between UPTOTWO and UPTOTHREE would
be the specific effect of choosing 3. This ASSUMES the underlying variable
represented by your ordinal IV is monotonic. If you are not sure about this,
you may use simple dummies as in my first example with DUMMYCAT1 to
DUMMYCAT4. Or you may try both and look at the results.
In any case, try to avoid dummies where very few cases have 0 or 1 (i.e.
dummies with very low or very high frequencies in each value): results could
be unstable and unreliable. If, for instance, very few people chose category
5, you may group them with category 5 and define the variable in question as
a four-category ordinal variable. Of course this way you sacrifice
information (difference between 4 and 5) but you avoid the unpleasant
consequences of a very small sample of cases in category 5.
Hope this helps.

Hector
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of SR
Millis
Sent: 05 September 2008 18:19
To: SPSSX-L@...
Subject: Fw: Re: Logistic Regression - Threshold effect sizes?

Jon,

If you're uncomfortable treating your ordinal variable
as though it were interval, you can always "dummy
code" the ordinal variable---such that the 5-category
variable become 4 separate variables---and direct
comparisons can be made. This can work pretty well if you
don't have a lot of ordinal vairables and if you're
sample size is sufficiently large.

Scott Millis

> --- On Fri, 9/5/08, Justin Black
> <justin.black@...> wrote:
>
> > From: Justin Black <justin.black@...>
> > Subject: Re: Logistic Regression - Threshold effect
> sizes?
> > To: "SR Millis" <srmillis@...>
> > Date: Friday, September 5, 2008, 6:13 PM
> > Scott, thank you for following up.
> >
> > What's puzzling to me is the seemingly omnibus
> nature
> > of the effect. So, I
> > could say that a 1-point increase in IV1 is associated
> with
> > a, e.g., 40%
> > increase in the likelihood of the event occurring.
> But
> > that assumes that a
> > 1-point increase in the IV has the same effect on the
> DV
> > regardless of the
> > baseline level of the IV. I don't think that
> > assumption is accurate in
> > these particular data.
> >
> > I really feel like I'm missing something here,
> just
> > can't figure out what.
> > A look back at Hosmer & Lemeshow didn't help
> any.
> >
> > Thank you,
> >
> > Jon
> >
> > On Fri, Sep 5, 2008 at 6:00 PM, SR Millis
> > <srmillis@...> wrote:
> >
> > > Jon,
> > >
> > > What is puzzling in the results?
> > >
> > > Have you examined the degree of collinearity
> among the
> > > predictors/covariates?
> > >
> > >
> > >
> > > Scott R Millis, PhD, MEd, ABPP (CN,CL,RP), CStat
> > > Professor & Director of Research
> > > Dept of Physical Medicine & Rehabilitation
> > > Wayne State University School of Medicine
> > > 261 Mack Blvd
> > > Detroit, MI 48201
> > > Email: smillis@...
> > > Tel: 313-993-8085
> > > Fax: 313-966-7682
> > >
> > >
> > > --- On Fri, 9/5/08, Jon Bernard
> > <jon563@...> wrote:
> > >
> > > > From: Jon Bernard <jon563@...>
> > > > Subject: Logistic Regression - Threshold
> effect
> > sizes?
> > > > To: SPSSX-L@...
> > > > Date: Friday, September 5, 2008, 5:42 PM
> > > > Fellow SPSSers,
> > > >
> > > > I am struggling with a logistic regression
> issue
> > and
> > > > thought I'd put it out
> > > > to the list for some clarity.
> > > >
> > > > The dependent variable of interest is a
> binary
> > event (0 =
> > > > Did not happen, 1
> > > > = Did happen). The independent variables of
> > interest are
> > > > ordinal
> > > > attitudinal survey items, with responses on
> a
> > 5-point scale
> > > > (1 = Strongly
> > > > Disagree, 5 = Strongly Agree). I have been
> using
> > logistic
> > > > regression for
> > > > the analysis, but either I'm missing
> > something in the
> > > > results output or I'm
> > > > using the wrong statistical technique. I
> have an
> > inkling
> > > > that the intervals
> > > > between categories of the independent
> variables
> > are not all
> > > > equal. In other
> > > > words, I think that the impact on the
> dependent
> > variable of
> > > > an independent
> > > > variable score of 3 vs. one of 2 is greater
> than
> > that of a
> > > > score of 5 vs.
> > > > one of 4. Is that clear? If so, what would
> you
> > recommend
> > > > in order to test
> > > > that hypothesis? Is there a class of
> techniques
> > designed
> > > > particularly for
> > > > this kind of test?
> > > >
> > > > Very many thanks in advance for your
> assistance
> > with this
> > > > matter.
> > > >
> > > > Kind regards,
> > > >
> > > > Jon
> > > >
> > > > =====================
> > > > To manage your subscription to SPSSX-L, send
> a
> > message to
> > > > LISTSERV@... (not to SPSSX-L),
> with
> > no body
> > > > text except the
> > > > command. To leave the list, send the command
> > > > SIGNOFF SPSSX-L
> > > > For a list of commands to manage
> subscriptions,
> > send the
> > > > command
> > > > INFO REFCARD
> > >

=====================
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=====================
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Re: Fw: Re: Logistic Regression - Threshold effect sizes?

2008-09-05T15:36:21Z

Jon,

If you're using SPSS binary logistic regression, enter your ordinal variable as a covariate. Then, click on the Categorical button. This will take you to a new window where you indicate which covariates are categorical. The Contrast should be "Indicator." Then run the analysis.

If you're using Stata software, you use the xi option.

Scott Millis

--- On Fri, 9/5/08, Jon Bernard <jon563@...> wrote:

> From: Jon Bernard <jon563@...>
> Subject: Re: Fw: Re: Logistic Regression - Threshold effect sizes?
> To: "SR Millis" <srmillis@...>
> Cc: SPSSX-L@...
> Date: Friday, September 5, 2008, 6:24 PM
> Thank you Scott. Would you recommend any resources for a
> quick study on
> this technique?
>
> Jon
>
> On Fri, Sep 5, 2008 at 6:18 PM, SR Millis
> <srmillis@...> wrote:
>
> > Jon,
> >
> > If you're uncomfortable treating your ordinal
> variable
> > as though it were interval, you can always "dummy
> > code" the ordinal variable---such that the
> 5-category
> > variable become 4 separate variables---and direct
> > comparisons can be made. This can work pretty well if
> you
> > don't have a lot of ordinal vairables and if
> you're
> > sample size is sufficiently large.
> >
> > Scott Millis
> >
> > > --- On Fri, 9/5/08, Justin Black
> > > <justin.black@...> wrote:
> > >
> > > > From: Justin Black
> <justin.black@...>
> > > > Subject: Re: Logistic Regression - Threshold
> effect
> > > sizes?
> > > > To: "SR Millis"
> <srmillis@...>
> > > > Date: Friday, September 5, 2008, 6:13 PM
> > > > Scott, thank you for following up.
> > > >
> > > > What's puzzling to me is the seemingly
> omnibus
> > > nature
> > > > of the effect. So, I
> > > > could say that a 1-point increase in IV1 is
> associated
> > > with
> > > > a, e.g., 40%
> > > > increase in the likelihood of the event
> occurring.
> > > But
> > > > that assumes that a
> > > > 1-point increase in the IV has the same
> effect on the
> > > DV
> > > > regardless of the
> > > > baseline level of the IV. I don't think
> that
> > > > assumption is accurate in
> > > > these particular data.
> > > >
> > > > I really feel like I'm missing something
> here,
> > > just
> > > > can't figure out what.
> > > > A look back at Hosmer & Lemeshow
> didn't help
> > > any.
> > > >
> > > > Thank you,
> > > >
> > > > Jon
> > > >
> > > > On Fri, Sep 5, 2008 at 6:00 PM, SR Millis
> > > > <srmillis@...> wrote:
> > > >
> > > > > Jon,
> > > > >
> > > > > What is puzzling in the results?
> > > > >
> > > > > Have you examined the degree of
> collinearity
> > > among the
> > > > > predictors/covariates?
> > > > >
> > > > >
> > > > >
> > > > > Scott R Millis, PhD, MEd, ABPP
> (CN,CL,RP), CStat
> > > > > Professor & Director of Research
> > > > > Dept of Physical Medicine &
> Rehabilitation
> > > > > Wayne State University School of
> Medicine
> > > > > 261 Mack Blvd
> > > > > Detroit, MI 48201
> > > > > Email: smillis@...
> > > > > Tel: 313-993-8085
> > > > > Fax: 313-966-7682
> > > > >
> > > > >
> > > > > --- On Fri, 9/5/08, Jon Bernard
> > > > <jon563@...> wrote:
> > > > >
> > > > > > From: Jon Bernard
> <jon563@...>
> > > > > > Subject: Logistic Regression -
> Threshold
> > > effect
> > > > sizes?
> > > > > > To: SPSSX-L@...
> > > > > > Date: Friday, September 5, 2008,
> 5:42 PM
> > > > > > Fellow SPSSers,
> > > > > >
> > > > > > I am struggling with a logistic
> regression
> > > issue
> > > > and
> > > > > > thought I'd put it out
> > > > > > to the list for some clarity.
> > > > > >
> > > > > > The dependent variable of interest
> is a
> > > binary
> > > > event (0 =
> > > > > > Did not happen, 1
> > > > > > = Did happen). The independent
> variables of
> > > > interest are
> > > > > > ordinal
> > > > > > attitudinal survey items, with
> responses on
> > > a
> > > > 5-point scale
> > > > > > (1 = Strongly
> > > > > > Disagree, 5 = Strongly Agree). I
> have been
> > > using
> > > > logistic
> > > > > > regression for
> > > > > > the analysis, but either I'm
> missing
> > > > something in the
> > > > > > results output or I'm
> > > > > > using the wrong statistical
> technique. I
> > > have an
> > > > inkling
> > > > > > that the intervals
> > > > > > between categories of the
> independent
> > > variables
> > > > are not all
> > > > > > equal. In other
> > > > > > words, I think that the impact on
> the
> > > dependent
> > > > variable of
> > > > > > an independent
> > > > > > variable score of 3 vs. one of 2
> is greater
> > > than
> > > > that of a
> > > > > > score of 5 vs.
> > > > > > one of 4. Is that clear? If so,
> what would
> > > you
> > > > recommend
> > > > > > in order to test
> > > > > > that hypothesis? Is there a class
> of
> > > techniques
> > > > designed
> > > > > > particularly for
> > > > > > this kind of test?
> > > > > >
> > > > > > Very many thanks in advance for
> your
> > > assistance
> > > > with this
> > > > > > matter.
> > > > > >
> > > > > > Kind regards,
> > > > > >
> > > > > > Jon
> > > > > >
> > > > > > =====================
> > > > > > To manage your subscription to
> SPSSX-L, send
> > > a
> > > > message to
> > > > > > LISTSERV@... (not to
> SPSSX-L),
> > > with
> > > > no body
> > > > > > text except the
> > > > > > command. To leave the list, send
> the command
> > > > > > SIGNOFF SPSSX-L
> > > > > > For a list of commands to manage
> > > subscriptions,
> > > > send the
> > > > > > command
> > > > > > INFO REFCARD
> > > > >
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message
> to
> > LISTSERV@... (not to SPSSX-L), with no
> body text except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send
> the command
> > INFO REFCARD
> >

Re: Fw: Re: Logistic Regression - Threshold effect sizes?

2008-09-05T15:24:31Z

Thank you Scott. Would you recommend any resources for a quick study on
this technique?

Jon

On Fri, Sep 5, 2008 at 6:18 PM, SR Millis <srmillis@...> wrote:

> Jon,
>
> If you're uncomfortable treating your ordinal variable
> as though it were interval, you can always "dummy
> code" the ordinal variable---such that the 5-category
> variable become 4 separate variables---and direct
> comparisons can be made. This can work pretty well if you
> don't have a lot of ordinal vairables and if you're
> sample size is sufficiently large.
>
> Scott Millis
>
> > --- On Fri, 9/5/08, Justin Black
> > <justin.black@...> wrote:
> >
> > > From: Justin Black <justin.black@...>
> > > Subject: Re: Logistic Regression - Threshold effect
> > sizes?
> > > To: "SR Millis" <srmillis@...>
> > > Date: Friday, September 5, 2008, 6:13 PM
> > > Scott, thank you for following up.
> > >
> > > What's puzzling to me is the seemingly omnibus
> > nature
> > > of the effect. So, I
> > > could say that a 1-point increase in IV1 is associated
> > with
> > > a, e.g., 40%
> > > increase in the likelihood of the event occurring.
> > But
> > > that assumes that a
> > > 1-point increase in the IV has the same effect on the
> > DV
> > > regardless of the
> > > baseline level of the IV. I don't think that
> > > assumption is accurate in
> > > these particular data.
> > >
> > > I really feel like I'm missing something here,
> > just
> > > can't figure out what.
> > > A look back at Hosmer & Lemeshow didn't help
> > any.
> > >
> > > Thank you,
> > >
> > > Jon
> > >
> > > On Fri, Sep 5, 2008 at 6:00 PM, SR Millis
> > > <srmillis@...> wrote:
> > >
> > > > Jon,
> > > >
> > > > What is puzzling in the results?
> > > >
> > > > Have you examined the degree of collinearity
> > among the
> > > > predictors/covariates?
> > > >
> > > >
> > > >
> > > > Scott R Millis, PhD, MEd, ABPP (CN,CL,RP), CStat
> > > > Professor & Director of Research
> > > > Dept of Physical Medicine & Rehabilitation
> > > > Wayne State University School of Medicine
> > > > 261 Mack Blvd
> > > > Detroit, MI 48201
> > > > Email: smillis@...
> > > > Tel: 313-993-8085
> > > > Fax: 313-966-7682
> > > >
> > > >
> > > > --- On Fri, 9/5/08, Jon Bernard
> > > <jon563@...> wrote:
> > > >
> > > > > From: Jon Bernard <jon563@...>
> > > > > Subject: Logistic Regression - Threshold
> > effect
> > > sizes?
> > > > > To: SPSSX-L@...
> > > > > Date: Friday, September 5, 2008, 5:42 PM
> > > > > Fellow SPSSers,
> > > > >
> > > > > I am struggling with a logistic regression
> > issue
> > > and
> > > > > thought I'd put it out
> > > > > to the list for some clarity.
> > > > >
> > > > > The dependent variable of interest is a
> > binary
> > > event (0 =
> > > > > Did not happen, 1
> > > > > = Did happen). The independent variables of
> > > interest are
> > > > > ordinal
> > > > > attitudinal survey items, with responses on
> > a
> > > 5-point scale
> > > > > (1 = Strongly
> > > > > Disagree, 5 = Strongly Agree). I have been
> > using
> > > logistic
> > > > > regression for
> > > > > the analysis, but either I'm missing
> > > something in the
> > > > > results output or I'm
> > > > > using the wrong statistical technique. I
> > have an
> > > inkling
> > > > > that the intervals
> > > > > between categories of the independent
> > variables
> > > are not all
> > > > > equal. In other
> > > > > words, I think that the impact on the
> > dependent
> > > variable of
> > > > > an independent
> > > > > variable score of 3 vs. one of 2 is greater
> > than
> > > that of a
> > > > > score of 5 vs.
> > > > > one of 4. Is that clear? If so, what would
> > you
> > > recommend
> > > > > in order to test
> > > > > that hypothesis? Is there a class of
> > techniques
> > > designed
> > > > > particularly for
> > > > > this kind of test?
> > > > >
> > > > > Very many thanks in advance for your
> > assistance
> > > with this
> > > > > matter.
> > > > >
> > > > > Kind regards,
> > > > >
> > > > > Jon
> > > > >
> > > > > =====================
> > > > > To manage your subscription to SPSSX-L, send
> > a
> > > message to
> > > > > LISTSERV@... (not to SPSSX-L),
> > with
> > > no body
> > > > > text except the
> > > > > command. To leave the list, send the command
> > > > > SIGNOFF SPSSX-L
> > > > > For a list of commands to manage
> > subscriptions,
> > > send the
> > > > > command
> > > > > INFO REFCARD
> > > >
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> LISTSERV@... (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>

Fw: Re: Logistic Regression - Threshold effect sizes?

2008-09-05T15:18:55Z

Jon,

If you're uncomfortable treating your ordinal variable
as though it were interval, you can always "dummy
code" the ordinal variable---such that the 5-category
variable become 4 separate variables---and direct
comparisons can be made. This can work pretty well if you
don't have a lot of ordinal vairables and if you're
sample size is sufficiently large.

Scott Millis

Re: Logistic Regression - Threshold effect sizes?

2008-09-05T15:17:39Z

Scott, thank you for following up.

What's puzzling to me is the seemingly omnibus nature of the effect. So, I
could say that a 1-point increase in IV1 is associated with a, e.g., 40%
increase in the likelihood of the event occurring. But that assumes that a
1-point increase in the IV has the same effect on the DV regardless of the
baseline level of the IV. I don't think that assumption is accurate in
these particular data.

I really feel like I'm missing something here, just can't figure out what.
A look back at Hosmer & Lemeshow didn't help any.

Thank you,

Jon

On Fri, Sep 5, 2008 at 6:00 PM, SR Millis <srmillis@...> wrote:

> Jon,
>
> What is puzzling in the results?
>
> Have you examined the degree of collinearity among the
> predictors/covariates?
>
>
>
> Scott R Millis, PhD, MEd, ABPP (CN,CL,RP), CStat
> Professor & Director of Research
> Dept of Physical Medicine & Rehabilitation
> Wayne State University School of Medicine
> 261 Mack Blvd
> Detroit, MI 48201
> Email: smillis@...
> Tel: 313-993-8085
> Fax: 313-966-7682
>
>
> --- On Fri, 9/5/08, Jon Bernard <jon563@...> wrote:
>
> > From: Jon Bernard <jon563@...>
> > Subject: Logistic Regression - Threshold effect sizes?
> > To: SPSSX-L@...
> > Date: Friday, September 5, 2008, 5:42 PM
> > Fellow SPSSers,
> >
> > I am struggling with a logistic regression issue and
> > thought I'd put it out
> > to the list for some clarity.
> >
> > The dependent variable of interest is a binary event (0 =
> > Did not happen, 1
> > = Did happen). The independent variables of interest are
> > ordinal
> > attitudinal survey items, with responses on a 5-point scale
> > (1 = Strongly
> > Disagree, 5 = Strongly Agree). I have been using logistic
> > regression for
> > the analysis, but either I'm missing something in the
> > results output or I'm
> > using the wrong statistical technique. I have an inkling
> > that the intervals
> > between categories of the independent variables are not all
> > equal. In other
> > words, I think that the impact on the dependent variable of
> > an independent
> > variable score of 3 vs. one of 2 is greater than that of a
> > score of 5 vs.
> > one of 4. Is that clear? If so, what would you recommend
> > in order to test
> > that hypothesis? Is there a class of techniques designed
> > particularly for
> > this kind of test?
> >
> > Very many thanks in advance for your assistance with this
> > matter.
> >
> > Kind regards,
> >
> > Jon
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > LISTSERV@... (not to SPSSX-L), with no body
> > text except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the
> > command
> > INFO REFCARD
>

Re: Logistic Regression - Threshold effect sizes?

2008-09-05T15:00:51Z

Jon,

What is puzzling in the results?

Have you examined the degree of collinearity among the predictors/covariates?

Scott R Millis, PhD, MEd, ABPP (CN,CL,RP), CStat
Professor & Director of Research
Dept of Physical Medicine & Rehabilitation
Wayne State University School of Medicine
261 Mack Blvd
Detroit, MI 48201
Email: smillis@...
Tel: 313-993-8085
Fax: 313-966-7682

--- On Fri, 9/5/08, Jon Bernard <jon563@...> wrote:

> From: Jon Bernard <jon563@...>
> Subject: Logistic Regression - Threshold effect sizes?
> To: SPSSX-L@...
> Date: Friday, September 5, 2008, 5:42 PM
> Fellow SPSSers,
>
> I am struggling with a logistic regression issue and
> thought I'd put it out
> to the list for some clarity.
>
> The dependent variable of interest is a binary event (0 =
> Did not happen, 1
> = Did happen). The independent variables of interest are
> ordinal
> attitudinal survey items, with responses on a 5-point scale
> (1 = Strongly
> Disagree, 5 = Strongly Agree). I have been using logistic
> regression for
> the analysis, but either I'm missing something in the
> results output or I'm
> using the wrong statistical technique. I have an inkling
> that the intervals
> between categories of the independent variables are not all
> equal. In other
> words, I think that the impact on the dependent variable of
> an independent
> variable score of 3 vs. one of 2 is greater than that of a
> score of 5 vs.
> one of 4. Is that clear? If so, what would you recommend
> in order to test
> that hypothesis? Is there a class of techniques designed
> particularly for
> this kind of test?
>
> Very many thanks in advance for your assistance with this
> matter.
>
> Kind regards,
>
> Jon
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> LISTSERV@... (not to SPSSX-L), with no body
> text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the
> command
> INFO REFCARD

Re: Question on 16: production facility

2008-09-05T14:43:39Z

SPSS owns it but doesn't execute it. To execute it you have to run it from
the command line using the appropriate command line parameters or wrap it in
a bat file containing the command line.

-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of Hal
9000
Sent: Friday, September 05, 2008 3:38 PM
To: SPSSX-L@...
Subject: Re: Question on 16: production facility

Does anybody know what could account for this - when double-clicking a
production file (*.spj) or running one via schedule, SPSS will launch
but the file won't execute. (?)

Here's the syntax file the production job comprises:

* test production job *.
data list free /v1 v2.
begin data
1 1
2 2
3 3
end data.
save outfile = 'c:\temp\production job test.sav'.

Thanks,
-Gary

On Fri, Sep 5, 2008 at 11:57 AM, Hal 9000 <9000.hal@...> wrote:
> Cool! I just discovered that - thanks.
>
> On Fri, Sep 5, 2008 at 11:55 AM, Oliver, Richard <roliver@...> wrote:
>> XP has built-in task scheduler: Control Panel>Scheduled Tasks
>>
>> -----Original Message-----
>> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of
Hal 9000

>> Sent: Friday, September 05, 2008 1:48 PM
>> To: SPSSX-L@...
>> Subject: Re: Question on 16: production facility
>>
>> "Command line switches enable you to schedule production jobs to run
>> automatically at certain times, using scheduling utilities available
>> on your operating system."
>>
>> It'd be nifty to know which scheduling utilities we're supposed to use
>> for, say, Windows XP.
>> -Gary
>>
>> On Fri, Sep 5, 2008 at 11:42 AM, ViAnn Beadle <vab88011@...> wrote:
>>> Go to Help and type Production Jobs into the Index box--you'll find all

the

>>> details on how to define and run a production job. Job creation is now
>>> integrated into SPSS.
>>>
>>> -----Original Message-----
>>> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of
>>> Gene Maguin
>>> Sent: Friday, September 05, 2008 11:49 AM
>>> To: SPSSX-L@...
>>> Subject: Question on 16: production facility
>>>
>>> All,
>>>
>>> I just got 16 installed and while I'm certainly not looking forward to

it,
>>> there's no choice for site licenses.
>>>
>>> My question: in the program listing, there used to be an entry for
>>> 'production facility'. There is not now on my installation. The only
entry
>>> is for 'license authorization wizard'. I'm assuming the production
facilty
>>> hasn't been done away with so how do I now access it?
>>>
>>> After looking at the so-called legacy viewer, I noticed that the export
>>> feature has been stripped out. This seems like a rather stupid decision
as I
>>> can easily see needing to export chunks of 15 output to a text file. The
>>> other odd thing is why the legacy viewer was not incorporated into the
16
>>> file open output. I don't know anything about the underlying code but it
>>> would seem to be trivial in difficulty. Probably both decisions were
driven
>>> by marketing. I'm guessing that 17 is either in production release or
late

>>> beta. So, I'm curious, does 17 support 15 and before output files?
>>>
>>> Gene Maguin
>>>
>>> =====================
>>> To manage your subscription to SPSSX-L, send a message to
>>> LISTSERV@... (not to SPSSX-L), with no body text except the
>>> command. To leave the list, send the command
>>> SIGNOFF SPSSX-L
>>> For a list of commands to manage subscriptions, send the command
>>> INFO REFCARD
>>>
>>> =====================
>>> To manage your subscription to SPSSX-L, send a message to
>>> LISTSERV@... (not to SPSSX-L), with no body text except the
>>> command. To leave the list, send the command
>>> SIGNOFF SPSSX-L
>>> For a list of commands to manage subscriptions, send the command
>>> INFO REFCARD
>>>
>>
>> =====================
>> To manage your subscription to SPSSX-L, send a message to
>> LISTSERV@... (not to SPSSX-L), with no body text except the
>> command. To leave the list, send the command
>> SIGNOFF SPSSX-L
>> For a list of commands to manage subscriptions, send the command
>> INFO REFCARD
>>
>

Logistic Regression - Threshold effect sizes?

2008-09-05T14:42:50Z

Fellow SPSSers,

I am struggling with a logistic regression issue and thought I'd put it out
to the list for some clarity.

The dependent variable of interest is a binary event (0 = Did not happen, 1
= Did happen). The independent variables of interest are ordinal
attitudinal survey items, with responses on a 5-point scale (1 = Strongly
Disagree, 5 = Strongly Agree). I have been using logistic regression for
the analysis, but either I'm missing something in the results output or I'm
using the wrong statistical technique. I have an inkling that the intervals
between categories of the independent variables are not all equal. In other
words, I think that the impact on the dependent variable of an independent
variable score of 3 vs. one of 2 is greater than that of a score of 5 vs.
one of 4. Is that clear? If so, what would you recommend in order to test
that hypothesis? Is there a class of techniques designed particularly for
this kind of test?

Very many thanks in advance for your assistance with this matter.

Kind regards,

Jon

=====================
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Re: Question on 16: production facility

2008-09-05T14:38:00Z

Does anybody know what could account for this - when double-clicking a
production file (*.spj) or running one via schedule, SPSS will launch
but the file won't execute. (?)

Here's the syntax file the production job comprises:

* test production job *.
data list free /v1 v2.
begin data
1 1
2 2
3 3
end data.
save outfile = 'c:\temp\production job test.sav'.

Thanks,
-Gary

On Fri, Sep 5, 2008 at 11:57 AM, Hal 9000 <9000.hal@...> wrote:

> Cool! I just discovered that - thanks.
>
> On Fri, Sep 5, 2008 at 11:55 AM, Oliver, Richard <roliver@...> wrote:
>> XP has built-in task scheduler: Control Panel>Scheduled Tasks
>>
>> -----Original Message-----
>> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of Hal 9000
>> Sent: Friday, September 05, 2008 1:48 PM
>> To: SPSSX-L@...
>> Subject: Re: Question on 16: production facility
>>
>> "Command line switches enable you to schedule production jobs to run
>> automatically at certain times, using scheduling utilities available
>> on your operating system."
>>
>> It'd be nifty to know which scheduling utilities we're supposed to use
>> for, say, Windows XP.
>> -Gary
>>
>> On Fri, Sep 5, 2008 at 11:42 AM, ViAnn Beadle <vab88011@...> wrote:
>>> Go to Help and type Production Jobs into the Index box--you'll find all the
>>> details on how to define and run a production job. Job creation is now
>>> integrated into SPSS.
>>>
>>> -----Original Message-----
>>> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of
>>> Gene Maguin
>>> Sent: Friday, September 05, 2008 11:49 AM
>>> To: SPSSX-L@...
>>> Subject: Question on 16: production facility
>>>
>>> All,
>>>
>>> I just got 16 installed and while I'm certainly not looking forward to it,
>>> there's no choice for site licenses.
>>>
>>> My question: in the program listing, there used to be an entry for
>>> 'production facility'. There is not now on my installation. The only entry
>>> is for 'license authorization wizard'. I'm assuming the production facilty
>>> hasn't been done away with so how do I now access it?
>>>
>>> After looking at the so-called legacy viewer, I noticed that the export
>>> feature has been stripped out. This seems like a rather stupid decision as I
>>> can easily see needing to export chunks of 15 output to a text file. The
>>> other odd thing is why the legacy viewer was not incorporated into the 16
>>> file open output. I don't know anything about the underlying code but it
>>> would seem to be trivial in difficulty. Probably both decisions were driven
>>> by marketing. I'm guessing that 17 is either in production release or late
>>> beta. So, I'm curious, does 17 support 15 and before output files?
>>>
>>> Gene Maguin
>>>
>>> =====================
>>> To manage your subscription to SPSSX-L, send a message to
>>> LISTSERV@... (not to SPSSX-L), with no body text except the
>>> command. To leave the list, send the command
>>> SIGNOFF SPSSX-L
>>> For a list of commands to manage subscriptions, send the command
>>> INFO REFCARD
>>>
>>> =====================
>>> To manage your subscription to SPSSX-L, send a message to
>>> LISTSERV@... (not to SPSSX-L), with no body text except the
>>> command. To leave the list, send the command
>>> SIGNOFF SPSSX-L
>>> For a list of commands to manage subscriptions, send the command
>>> INFO REFCARD
>>>
>>
>> =====================
>> To manage your subscription to SPSSX-L, send a message to
>> LISTSERV@... (not to SPSSX-L), with no body text except the
>> command. To leave the list, send the command
>> SIGNOFF SPSSX-L
>> For a list of commands to manage subscriptions, send the command
>> INFO REFCARD
>>
>

Re: Question on 16: production facility

2008-09-05T11:57:47Z

Cool! I just discovered that - thanks.

On Fri, Sep 5, 2008 at 11:55 AM, Oliver, Richard <roliver@...> wrote:

> XP has built-in task scheduler: Control Panel>Scheduled Tasks
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of Hal 9000
> Sent: Friday, September 05, 2008 1:48 PM
> To: SPSSX-L@...
> Subject: Re: Question on 16: production facility
>
> "Command line switches enable you to schedule production jobs to run
> automatically at certain times, using scheduling utilities available
> on your operating system."
>
> It'd be nifty to know which scheduling utilities we're supposed to use
> for, say, Windows XP.
> -Gary
>
> On Fri, Sep 5, 2008 at 11:42 AM, ViAnn Beadle <vab88011@...> wrote:
>> Go to Help and type Production Jobs into the Index box--you'll find all the
>> details on how to define and run a production job. Job creation is now
>> integrated into SPSS.
>>
>> -----Original Message-----
>> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of
>> Gene Maguin
>> Sent: Friday, September 05, 2008 11:49 AM
>> To: SPSSX-L@...
>> Subject: Question on 16: production facility
>>
>> All,
>>
>> I just got 16 installed and while I'm certainly not looking forward to it,
>> there's no choice for site licenses.
>>
>> My question: in the program listing, there used to be an entry for
>> 'production facility'. There is not now on my installation. The only entry
>> is for 'license authorization wizard'. I'm assuming the production facilty
>> hasn't been done away with so how do I now access it?
>>
>> After looking at the so-called legacy viewer, I noticed that the export
>> feature has been stripped out. This seems like a rather stupid decision as I
>> can easily see needing to export chunks of 15 output to a text file. The
>> other odd thing is why the legacy viewer was not incorporated into the 16
>> file open output. I don't know anything about the underlying code but it
>> would seem to be trivial in difficulty. Probably both decisions were driven
>> by marketing. I'm guessing that 17 is either in production release or late
>> beta. So, I'm curious, does 17 support 15 and before output files?
>>
>> Gene Maguin
>>
>> =====================
>> To manage your subscription to SPSSX-L, send a message to
>> LISTSERV@... (not to SPSSX-L), with no body text except the
>> command. To leave the list, send the command
>> SIGNOFF SPSSX-L
>> For a list of commands to manage subscriptions, send the command
>> INFO REFCARD
>>
>> =====================
>> To manage your subscription to SPSSX-L, send a message to
>> LISTSERV@... (not to SPSSX-L), with no body text except the
>> command. To leave the list, send the command
>> SIGNOFF SPSSX-L
>> For a list of commands to manage subscriptions, send the command
>> INFO REFCARD
>>
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> LISTSERV@... (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>

Re: Question on 16: production facility

2008-09-05T11:55:19Z

XP has built-in task scheduler: Control Panel>Scheduled Tasks

-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of Hal 9000
Sent: Friday, September 05, 2008 1:48 PM
To: SPSSX-L@...
Subject: Re: Question on 16: production facility

"Command line switches enable you to schedule production jobs to run
automatically at certain times, using scheduling utilities available
on your operating system."

It'd be nifty to know which scheduling utilities we're supposed to use
for, say, Windows XP.
-Gary

On Fri, Sep 5, 2008 at 11:42 AM, ViAnn Beadle <vab88011@...> wrote:

> Go to Help and type Production Jobs into the Index box--you'll find all the
> details on how to define and run a production job. Job creation is now
> integrated into SPSS.
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of
> Gene Maguin
> Sent: Friday, September 05, 2008 11:49 AM
> To: SPSSX-L@...
> Subject: Question on 16: production facility
>
> All,
>
> I just got 16 installed and while I'm certainly not looking forward to it,
> there's no choice for site licenses.
>
> My question: in the program listing, there used to be an entry for
> 'production facility'. There is not now on my installation. The only entry
> is for 'license authorization wizard'. I'm assuming the production facilty
> hasn't been done away with so how do I now access it?
>
> After looking at the so-called legacy viewer, I noticed that the export
> feature has been stripped out. This seems like a rather stupid decision as I
> can easily see needing to export chunks of 15 output to a text file. The
> other odd thing is why the legacy viewer was not incorporated into the 16
> file open output. I don't know anything about the underlying code but it
> would seem to be trivial in difficulty. Probably both decisions were driven
> by marketing. I'm guessing that 17 is either in production release or late
> beta. So, I'm curious, does 17 support 15 and before output files?
>
> Gene Maguin
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> LISTSERV@... (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> LISTSERV@... (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>

Re: Question on 16: production facility

2008-09-05T11:48:14Z

"Command line switches enable you to schedule production jobs to run
automatically at certain times, using scheduling utilities available
on your operating system."

It'd be nifty to know which scheduling utilities we're supposed to use
for, say, Windows XP.
-Gary

On Fri, Sep 5, 2008 at 11:42 AM, ViAnn Beadle <vab88011@...> wrote:

Re: Question on 16: production facility

2008-09-05T11:42:42Z

Go to Help and type Production Jobs into the Index box--you'll find all the
details on how to define and run a production job. Job creation is now
integrated into SPSS.

-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@...] On Behalf Of
Gene Maguin
Sent: Friday, September 05, 2008 11:49 AM
To: SPSSX-L@...
Subject: Question on 16: production facility

All,

I just got 16 installed and while I'm certainly not looking forward to it,
there's no choice for site licenses.

My question: in the program listing, there used to be an entry for
'production facility'. There is not now on my installation. The only entry
is for 'license authorization wizard'. I'm assuming the production facilty
hasn't been done away with so how do I now access it?

After looking at the so-called legacy viewer, I noticed that the export
feature has been stripped out. This seems like a rather stupid decision as I
can easily see needing to export chunks of 15 output to a text file. The
other odd thing is why the legacy viewer was not incorporated into the 16
file open output. I don't know anything about the underlying code but it
would seem to be trivial in difficulty. Probably both decisions were driven
by marketing. I'm guessing that 17 is either in production release or late
beta. So, I'm curious, does 17 support 15 and before output files?

Gene Maguin

=====================
To manage your subscription to SPSSX-L, send a message to
LISTSERV@... (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

=====================
To manage your subscription to SPSSX-L, send a message to
LISTSERV@... (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
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Re: Modeling Death a Continuous Variable

2008-09-05T11:38:01Z

To weigh in late, with the advantage of reading other responses --

At 04:53 PM 8/28/2008, Max Gunther wrote:

>We are looking at the effect of a drug that was
>randomized between two groups. We would ideally
>like to operationalize this by using a
>continuous variable that we can call "severity
>of illness." Since many of the patients die
>while they are being studied, and they die at
>higher rates in the drug B group, it ends up
>making *the data look like drug B patients do
>better because there are no "severity of
>illness" ratings since they are deceased.*
>
>*I would ideally like to use death as a
>quantitative end point of the continuous
>variable "severity of illness" but am not sure how to do this.*

Let me restate this, as I understand it:

You have an operational measure "severity of
illness." You are satisfied that it is (or
measures) the underlying quantity of interest,
and that it is of scale level. It is the dependent variable in your analysis.

You wish to make deceased patients available for
analysis, by assigning them a "severity" score.
It looks like (this is less clear),

1. You are comfortable with giving all deceased
patients the same severity score

2. Your severity scale is closed-ended; that is,
there it has an inherent maximum value. You wish
to assign deceased patients some score higher than this maximum value.

3. You want the result to still be a valid scale-level value.

I suggest,
a. Simply assign deceased patients the maximum
severity score. You can then argue that, since
the 'correct' value is probably higher than this,
and group B has higher mortality, your analysis
is conservative in that it has a bias against finding group B inferior.

b. You can cut loose from your severity score and
use mortality as your outcome measure. You should
carry out and publish this analysis, in any case.

c. Finally, just how sure are you, that your
severity measure is scale-level in the first
place? A lot of people would consider ordinal
analysis in your situation; and for that, all you
need do is assign deceased patients some
convenient severity value above the top of the scale.

On SPSSX-L, I think of Marta García-Granero and
Anita van der Kooij as the experts on ordinal
analysis, far beyond my level; there are others,
as well. I don't know if anybody wants to weigh in on the idea.

-Best of good fortune,
Richard

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ICC for binary ratings (in SPSS)

2008-09-05T11:02:23Z

Hi
I tried to search the archives in vain - apologies if I missed anything..

My query:

I have three pairs of raters observing the presence/absence of a behaviour.
Each pair made about 30 observations. I understand that Kappa statistics are
commonly employed for examining inter-rater agreement. John Uebersax noted a
few concerns however and recommended that one could instead directly
calculate the intraclass correlation (Source:
http://ourworld.compuserve.com/homepages/jsuebersax/kappa.htm )

I did stumble upon about a paper explicating the use of ICC for binary data.
Ridout, M. S., Demetrio, C. G., & Firth, D. (1999). Estimating intraclass
correlation for binary data. Biometrics, 55(1), 137-148.

And another that appears to suggest similarly:
http://www.science.ulster.ac.uk/research/psychology/profiles/g_rae/equi_rater_kappa_statistics_inter_correl.pdf

I must confess that I do not have the ability to comprehend the mathematical
logic.. Can I can perform the usual ICC procedures in SPSS for binary
ratings? If so, is there anything I should note? I wish to assume that the
three pairs of raters were randomly selected so that I may generalise the
findings to a larger population of inidividuals who can perform the rating
task as well. I am using SPSS v11.5 and v12.

Any advice would be valuable - thanks so much!

chong

=====================
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Question on 16: production facility

2008-09-05T10:47:03Z

All,

I just got 16 installed and while I'm certainly not looking forward to it,
there's no choice for site licenses.

My question: in the program listing, there used to be an entry for
'production facility'. There is not now on my installation. The only entry
is for 'license authorization wizard'. I'm assuming the production facilty
hasn't been done away with so how do I now access it?

After looking at the so-called legacy viewer, I noticed that the export
feature has been stripped out. This seems like a rather stupid decision as I
can easily see needing to export chunks of 15 output to a text file. The
other odd thing is why the legacy viewer was not incorporated into the 16
file open output. I don't know anything about the underlying code but it
would seem to be trivial in difficulty. Probably both decisions were driven
by marketing. I'm guessing that 17 is either in production release or late
beta. So, I'm curious, does 17 support 15 and before output files?

Gene Maguin

=====================
To manage your subscription to SPSSX-L, send a message to
LISTSERV@... (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD