Author ORCID Identifier:

https://orcid.org/0000-0002-0479-5002

Date of Graduation

7-2026

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Psychology (PhD)

Degree Level

Graduate

Department

Psychological Science

Advisor/Mentor

Quetsch, Lauren

Committee Member

Fugitt, Jessica

Second Committee Member

Kilmer, Michelle

Keywords

autism; developmental delays; Japan; PCIT-T

Abstract

Parent-Child Interaction Therapy for Toddlers (PCIT-T) is a toddler adaptation of Parent-Child Interaction Therapy designed to improve social-emotional development and parenting practices among children under two years of age. This study evaluated the effectiveness of PCIT-T among Japanese families and explored whether treatment outcomes differed between neurotypical toddlers and autistic children and/or children with developmental delays. Data was analyzed from 83 parent-child dyads who received PCIT-T in community-based agencies across Japan between 2018 and 2023. Results indicated significant improvements in children’s protective developmental factors, caregiver use of PRIDE skills, and reductions in Avoid skills following treatment. CARES skills did not demonstrate significant pre- to post-intervention changes. No significant differences in treatment outcomes were found between neurotypical children and autistic children and/or children with developmental delays, suggesting that PCIT-T was similarly effective across developmental groups. The results provide supporting evidence of the effectiveness of PCIT-T in Kapan, indicating that intervention may strengthen parent-child relationships, improve positive parenting practices, and promote children’s social-emotional development across diverse Japanese families.

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