Fig. 3: Effects of group, target size, and distractor size on the four fitted parameters of the VP model.

A The mean resources as a function of target size, generated by the fitted initial resource (B) and decay exponent (C) values. D, E The fitted resource allocation variability and choice variability, respectively. The main group effect was found only in resource allocation variability (D). Specifically, SZ showed overall greater resource allocation variability than HC, and adding distractors increased the resource allocation variability only in HC but not in SZ, indicating that SZ are more resistant to distraction than HC. No group × distractor size interaction was observed for initial resource, decay exponent, and choice variability. Shaded areas in (A) and error bars in (B–E) denote ±SEM across subjects. Significance symbol conventions are *p < 0.05; **p < 0.01; n.s. non-significant.