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Results

#1. A Board Certified Behavior Analyst (BCBA) is analyzing a graph of a client’s behavior. The graph displays a pattern where, immediately following the delivery of reinforcement, there is a distinct period of no responding or very low responding, followed by a rapid and steady increase in the rate of behavior until the next reinforcement is delivered. This cycle consistently repeats, and the line segments depicting the increase in responding are generally straight rather than curved. Which basic schedule of reinforcement does this pattern most accurately represent?

Fixed Interval (FI)

Variable Interval (VI)

Fixed Ratio (FR)

Variable Ratio (VR)

The described pattern a postreinforcement pause followed by a high steady rate of responding is characteristic of a Fixed Ratio FR schedule In an FR schedule reinforcement is delivered after a specific fixed number of responses The pause often occurs because the individual can see the requirement for the next reinforcement eg I just got reinforced for 10 responses now I need to make another 10 Once responding resumes it tends to be at a high and steady rate to quickly meet the ratio requirement Fixed Interval FI schedules also produce postreinforcement pauses but the rate of responding typically accelerates gradually as the interval nears its end creating a scalloped pattern on a cumulative record Variable Ratio VR and Variable Interval VI schedules because of their unpredictable nature generally produce steady high rates of responding with very few or no postreinforcement pauses

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