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Welcome to the Compare 2 Arrays module, a module within the Evaluation Toolkit. The C2A module directly compares two lists of images, head to head. This module can be used in a modified round robin approach where the specific comparisons between the images are hard-coded into the two arrays. Or it can be used to create a 2AFC experiment where both the baseline and the test stimuli vary (so each test stimuli needs its own baseline for comparison).
In this image-based adaptation where the C2A module is used in the 2AFC method, a subject is shown a series of comparisons or image pairs. Each image pair includes the baseline image and its corresponding test image. The C2A module automatically randomizes the left/right appearance of the images and also randomizes the order in which the image pairs are shown.
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