TY - RPRT TI - How Well Does Structural MRI Classify Autism? A Leakage-Free, Site-Aware and Externally Validated Machine-Learning Evaluation in Two ABIDE Cohorts AU - Akar, B. AU - Elik, C. AU - Altıntas, T. PY - 2026 DO - 10.64898/2026.10.31.763319 UR - https://www.biorxiv.org/content/10.64898/2026.10.31.763319v1 ID - 10.64898/2026.10.31.763319 ER -