In phase 1 of a choice experiment involving concurrent vi schedules, a human subject receives 25% of his reinforcers by making a left response. in phase 2, he receives 75% of his reinforcers by making a left response. the subject’s percentage of left responses is actually 25% in phase 1, and 75% in phase 2. this performance is an example

overmatching        

Explanation:

Overmatching: The term overmatching refers to the process of an unnecessary matching or participants in a case-control or cohort study. During the research, to enhance or increase the stratified analysis of an observational method of research then an experimenter should choose or match controls & cases or unexposed & exposed participants based on the characteristics of interest.

In the question above, the given statement signifies an example of overmatching.

answer; decoy;

answer; how people relate to each other and influence each other;