Dear List: Here is a situation that I am trying to work with. I am
trying to help a colleague with her analyses of clinical data. Clients
come to therapy and they are assessed for their levels l of functioning.
They can have up to 32 sessions. Session I results are compared to
session II results to see whether the client had clinical reliable
change. Individuals are then categorized into 1 -clinical reliable
change 0 -no clinical reliable change. This is continued until 32
sessions. However, most clients drop out from therapy some that have
shown clinical reliable change while others drop out without showing
clinical reliable change. Thus the number of sessions can vary from 1 to
32. Some clients may end therapy after 5 sessions and be classified as
clinical reliable change. Other clients might go 5 sessions and still
show no clinical reliable change. She wants to do Probit analysis but
I have never done one and I am not sure what the variables should be. I
have been able to figure out that the number of sessions is one of the
variables. Questions that I have are the following: In probit it asks
for Response Frequency [Select a response frequency variable. Each case
should contain the number of individuals that responded when exposed to
a particular stimulus level (or combination of stimulus levels, if you
have several stimuli], Total Observed [Select an observed frequency
variable. Each case should contain the total number of individuals
exposed to a particular stimulus level or combination of stimulus
levels], Factor [Estimates separate intercepts for subgroups. You must
indicate which factor levels you want to use by defining the factor
range], and Covariate. I am not exactly certain what variables to put
in. I figured if I can run an example data set with Probit I would be
able to figure out exactly what I need to extract from her data set. If
anyone has the time and the inclination I would appreciate advice.
Thanks, martin
Martin F. Sherman, Ph.D.
Professor of Psychology
Loyola College
Director of Masters Education: Thesis Track
Psychology Department
222 B Beatty Hall
4501 North Charles Street
Baltimore, MD 21210
Martin F. Sherman, Ph.D.
Professor of Psychology
Director of Masters Education: Thesis Track
Loyola College
Psychology Department
222 B Beatty Hall
4501 North Charles Street
Baltimore, MD 21210
410 617-2417 (office)
410 617-5341 (fax)
[hidden email]
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