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The window narrowing produced by 2-AFC and 2-IFC training tasks are highly similar in dynamics and degree. Plotted are the average window sizes across the training week in 2-AFC (dark gray) and 2-IFC (light gray) subjects. Window size magnitude and degree of change do not significantly differ between the two groups, although the 2-AFC group reached significance from baseline one assessment earlier than those who underwent the 2-IFC task (asterisks). *p < 0.05, **p < 0.01.
