This is the Power Point for the Presentation on Thursday afternoon
Abstract: This paper describes the use of a single subject design (SSD n=1) for measuring individual client outcomes over time using the ipsative Z test developed by Mauser, Yarnold and Foy (1991) for autocorrelated data. This measure was tested using Global Appraisal of Individual Need(GAIN) data for 613 youth in outpatient drug treatment. The study examined changes over time (baseline, 3,6,12 months) for substance use, self reported criminal behavior and emotional problems. The result was identification of individual clients who significantly improved, significantly deteriorated, or displayed no significant change over time for these GAIN outcomes. This approach yields two advantages. First it can be used to test causation between an intervention and individual client change. Second it provides clinicians with information during an intervention that can be used to modify programs to better serve client needs. The paper includes the SPSS syntax used to compute the ipsative Z score per individuals.