Contemporary Research on Child-Centered Play Therapy (CCPT) Modalities: A Meta-Analytic Review of Controlled Outcome Studies Page: 2
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Lin, Yung-Wei (Dennis). Contemporary research on child-centered play therapy (CCPT)
modalities: A meta-analytic review of controlled outcome studies. Doctor of Philosophy
(Counseling), May 2011, 171 pp., 30 tables, 3 figures, 252 titles.
The present meta-analytic study estimated the overall effectiveness of child therapy
interventions using CCPT methodology and explored the relationships between study
characteristics and treatment effects. Fifty-two studies between 1995 and the present were
included based on the following criteria: (a) the use of CCPT methodology, (b) the use of control
or comparison repeated measure design, (c) the use of standardized psychometric assessment,
and (d) clear reports of effect sizes or sufficient information for effect size calculation.
Hierarchical linear modeling (HLM) techniques were utilized to estimate the overall
effect size for the collected studies and explore relationships between effect sizes and study
characteristics. Dependent variable included 239 effect sizes, and independent variables
included 22 study characteristics. The mean age of all child participants in the collected studies
was 6.7. In 15 studies, the majority of participants were Caucasian. An equal number of studies
were made up of non-Caucasian participants, including 3 with majority African American, 4
with majority Hispanic/Latino participants, 5 with majority Asian/Asian American participants,
and 3 with other ethnic populations. Study collection included 33 studies with majority of boys
and 11 studies with majority of girls.
HLM analysis estimated a statistically significant overall effect size of 0.47 for the
collected studies (p < 0.001). This result indicated that the overall improvement from pre to
posttreatment demonstrated by children in experimental groups was approximately 1/2 standard
deviation better than by children in control groups. A statistically significant amount (49.2%) of
between-study variance was found (p < 0.001), indicating the heterogeneity among the 52 studies.
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Lin, Yung-Wei (Dennis). Contemporary Research on Child-Centered Play Therapy (CCPT) Modalities: A Meta-Analytic Review of Controlled Outcome Studies, dissertation, May 2011; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc68001/m1/2/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .