The behavior analyst has had good results with an intervention she designed that makes access to video games contingent upon playing with other children. She now wants to compare the effects of differing amounts of video game access time. She should conduct a

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A parametric study involves manipulating one or more variables and measuring the effects on behavior, which is exactly what the behavior analyst is planning to do by comparing the effects of differing amounts of video game access time. Option A, changing criterion study, involves gradually changing criteria for behavior change, and is not relevant to the behavior analyst's question. Option B, nonparametric study, involves analyzing data without making assumptions about the underlying distribution, and is not relevant to the behavior analyst's question. Option D, reversal study, involves evaluating the effects of removing an intervention or going back to a previous condition, and is not relevant to the behavior analyst's question.

The Behavior Analyst Has Had Good Results with an Intervention