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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Neuropsychologia. 2015 Jul 18;77:19–34. doi: 10.1016/j.neuropsychologia.2015.07.019

Figure 1.

Figure 1

Diagrammatic representation of problem structure showing consecutive stimulus displays. After subjects applied a learned rule correctly for 4-7 trials, the rule was switched. Subjects were cued that it was time to switch in one of three manners: Feedback cued: there was no visual indication that subjects should switch in the stimulus displays; subjects merely began to receive negative feedback. Externally cued: the color of the box surrounding the stimuli changed color to indicate that subjects should switch rules. However, the stimuli continued to used the same color and letter features. Feature cued: The color and letter features of the stimui were changed.