Cristal Aldrete


Dr. Dee Ray
Research Topic: 
The Development of Psychometric Properties of the Play Therapy Skills Checklist (PTSC)
"The Play Therapy Skills Checklist (PTSC) is an instrument used primarily in the training, supervision, and research of child centered play therapy; however, reliability procedures have not yet been conducted. This study represents the first psychometric exploration of the instrument through the establishment of inter-rater reliability lending validity to the application of PTSC in play therapy research. A free marginal multi-rater kappa was computed to check the reliability of raters' categorization of play therapy responses. The resulting kappa of .82 indicates that the raters categorized play therapy responses in a similar form. The intra-class correlation coefficient (ICC) indicates that the inter-rater reliability for the play therapists' ratings of play therapy response categories was .95, indicating high levels of inter-rater reliability. Our results indicate a strong agreement between the raters and the categories listed in the PTSC. It is recommended that researchers continue to explore the test-retest reliability, as well as other validity procedures."
Alma Mater: 
B.A. Psychology | University of North Texas 2016