Figure 2.

Screening stimuli. (A) These are 2 examples of randomly generated “blobs” of the type used to screen for visual activity. Each blob was composed from a library of 64 strokes saved as alpha masks. Four randomly chosen strokes were randomly positioned and then colored with a randomly chosen texture. This gave us a method for screening for visual activity with images that were dissimilar from the photographic clip art images used for the familiar and novel test sets. (B) These are 2 of the familiar clip art images used for 1 of the monkeys. (C) Two novel images for 1 monkey on one day are shown. These came from the same photo clip art set as the familiar images.