Intrinsic Learning Rather than External Difficulty Dominates Decision Performance: Integrated Evidence from the Drift-Diffusion Model and Random Forest Analysis.

The main effect of Block was significant: with the increase in the number of experimental Blocks, the boundary parameter generally showed a decreasing trend, with only a slight rebound in Block 4 due to increased task complexity (See the Boundary Parameter (a) section in Table 3 for details).

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The main effect of Block was significant: with the increase in the number of experimental blocks, the drift rate generally showed an increasing trend, with only a slight fluctuation in Block 5 due to the fatigue effect (See the Drift Rate (v) section in Table 3 for details), which indicated that individuals’ information processing efficiency gradually improved during the task execution.

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