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. Author manuscript; available in PMC: 2011 Jun 10.
Published in final edited form as: Neuron. 2010 Jun 10;66(5):796–807. doi: 10.1016/j.neuron.2010.05.005

Figure 1. Stimulus Set & Behavioral Task.

Figure 1

A: Morphing allowed parameterization of sample images. An example morph line between Cat prototype c1 and Dog prototype d2 displays images at the morph steps used for recording. Intermediate images were a mix of the two prototypes. Those images comprised of greater than 50% of one category (marked by the ‘Category Boundary’) where to be classified as a member of that category. B: Stimuli came from two independent category sets, Animals and Cars. The Animal category set was divided into “Cats” vs. “Dogs” and the Car category set had “Sports Cars” and “Sedans” categories. Both sets were comprised of four prototype images (two from each category as shown) as well as images along four between category morph lines. C: The delayed match to category task required monkeys to respond to whether a test stimulus matched the category of the sample stimulus. During the sample and delay periods, the monkeys must hold in memory the category of the sample stimulus but the outcome of the trial is unknown.