This pilot randomized study examines the feasibility and preliminary effects of a Naturalistic Teaching (NT)-based group psychoeducation program for parents of autistic preschool children in Türkiye. After providing consent, parents are randomized to one of three conditions: (1) a 10-week NT-based group psychoeducation program delivered weekly (90 minutes per session), (2) a single-session general parenting seminar that does not include autism-specific content (attention control), or (3) a wait-list control group that receives access to intervention materials after the post-test. The primary outcome is parental self-efficacy, assessed using parent-report questionnaires. Outcomes are measured at baseline and post-test, and a later follow-up assessment is used to evaluate whether improvements are maintained. The study also tracks feasibility indicators such as retention and session attendance.