Methodological and assessment considerations in evaluating reinforcement programs in applied settings.

The extensive use of reinforcement programs in applied settings has led to experimentation that often fails to consider potential problems in design. The logic of the within-subject design is reviewed and specific designs employed in reinforcement programs are discussed. For each design (ABAB, or multiple-baseline design across behaviors, individuals, or situations), effects are discussed that make that design less powerful with respect to demonstrating the effect of the experimental variable. Problems in interpreting results of experiments in this area of inquiry are evaluated from the standpoint of internal and external validity. The issue of control groups is presented with considerations as to situations that require their use. Finally, the assessment strategy for evaluating operant programs is discussed and recommendations are made for measurement of behaviors in addition to the target response.