CPP Cohort 4
Descriptive Statistics: Pre-treatment assessment measure means, standard deviations, and standard errors for the Parent’s Observation of Social Interactions (POSI)* questionnaire (ages 18 months through 34 months) are listed in the table below, as well as the range of possible scores and scores that indicate review is needed. Post-treatment assessment measure means, standard deviations, and standard errors are not provided for the POSI because data was missing for all clients at post-treatment.
POSI: Descriptive Statistics
Repeated Measures Analysis: Because the Parent’s Observation of Social Interactions (POSI) questionnaire was not administered at post-treatment, paired samples t-tests could not be conducted to examine pre-post group mean differences.
Individual Clinically Significant Change: At pre-treatment, 2 of 4 clients (50%) had POSI scores that indicated review was needed. Because this measure was not administered to any clients at post-treatment, individual clinically significant change was unable to be determined.
*Smith, N. J., Sheldrick, R. C., & Perrin, E. C. (2013). An abbreviated screening instrument for autism spectrum disorders. Infant Mental Health Journal, 34(2), 149-155