Dear colleges,

I am conducting a study comparing the effectiveness of two intervention models, ABA and ABA+Sensory Stimulation (SS), in reducing ASD symptoms and increasing Theory of Mind (ToM).

Research Question: Which intervention (ABA or ABA+SS) is more effective in reducing ASD symptoms and improving ToM?

Study Design:

• Two groups: ABA (n=15) and ABA+SS (n=15), with no other interventions provided.
• Two measurement points: Baseline and post-intervention (3 months apart).

What statistical methods would you recommend for analyzing this data? Specifically, which tests in SPSS would best evaluate intervention effectiveness within groups and between groups?

I would greatly appreciate your advice on the most suitable statistical approaches for this study.

Thank you!