Figure 2.

Correct responses to learn unit presentations of Participants A, B, and C while: (a) teaching them the match repertoire for their first set of pictures prior to the baseline; (b) providing the multiple exemplar instruction across point-to, pure tact, and impure tact responses for their second set of pictures (data points shown for each type of response); and (c) teaching them the match responses for their third set of pictures prior to the final probe for untaught speaker and listener responses. These data constitute measures of the implementation of the independent variable that was mastery of a subset of stimuli (Set 2 pictures) under MEI conditions.