Fig 1. (A) Six examples of MTS stimuli used during training and neuroimaging.

Each stimulus is designated by a letter–number combination. (B) Computer screen display for a MTS trial used during training and neuroimaging. (C) Screen display for a match relation control trial in which the sample and comparison were identical—match trials served as the sensorimotor control or baseline condition to evaluate increases in BOLD signal activation during discriminations of trained and derived relations.