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Cooper, J. O., Heron, T. E., & Heward, W. L. (2020).Applied behavior analysis. Pearson UK. Chapter 11, pages 277-280

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Reinforcer assessment refers to a variety of direct, data-based methods used to present one or more stimuli contingent on a target response and then measuring the future effects on the rate of responding. Researchers and practitioners have developed reinforcer assessment methods to determine the relative effects of a given stimulus as reinforcement under different and changing conditions and to assess the comparative effectiveness of multiple stimuli as reinforcers for a given behavior under specific conditions. Reinforcer assessment or analysis is often accomplished by presenting stimuli suspected of being reinforcers either "in the moment" or contingent on responding within concurrent, multiple, or progressive-ratio reinforcement schedules.¹⁴

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