I should investigate the relationship between the time-course of a variable (assessed by means of growth curve analysis) and the treatment outcome in a sample of about 69 therapies. I was wondering if I should rather (1) create a good vs. poor outcome groups based on the outcome questionnaire scores I have, or (2) to stay with the values of the questionnaire and to insert directly there into the analysis.
Thanks a lot!
Dear Omar, if you could create outcome groups based on criteria for meaningful (or clinically significant) change it would be the best choice..
BW,
Alberto
Dear Omar,
perhaps you already know, bot there is a lot of discussion about process-outcome research. Overviews about the current state as well as problems in defining clinically significant outcome and relevant literature, you find in "Bergin and Garfield's Handbook of Psychotherapy and Behavior Change, 2013, 6th Edition, by Michael J. Lambert, ISBN: 978-1-118-03820-8" as well as in older editions.
Regards Thomas
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