Haoran (Matt) Wan

Journal article Journal of the experimental analysis of behavior · July 2026 The discounting of delayed rewards plays an important role in everyday decision making, and steep discounting is associated with numerous behavioral problems. Most tasks used to assess delay discounting, however, are far simpler than many everyday decision ... Full text Cite

Behavioral economic analysis of pigeons' token accumulation and reinforcer demand in a laboratory-based token economy.

Journal article Journal of the experimental analysis of behavior · March 2026 The present study examined pigeons' token accumulation and food reinforcer demand within a token economy using a behavioral economic approach. Six pigeons were exposed to a token reinforcement procedure, in which responses on a token-production key produce ... Full text Cite

Age, income, and the discounting of delayed monetary losses.

Journal article The journals of gerontology. Series B, Psychological sciences and social sciences · October 2025 ObjectivesPrevious studies failed to find age-related differences in the discounting of delayed, monetary losses, potentially due to their failure to examine the effects of income and their use of relatively small loss amounts. Accordingly, the pr ... Full text Cite

Discounting of probabilistic food reinforcement by pigeons.

Journal article Journal of the experimental analysis of behavior · July 2025 Two experiments examined pigeons' discounting of probabilistic food reinforcers using a concurrent-chains procedure within sessions combined with an adjusting-amount procedure across sessions. The study is the first to evaluate probability discounting func ... Full text Cite

Age-related differences in delay discounting: Income matters.

Journal article Psychology and aging · September 2024 Although the authors of a recent meta-analysis concluded there were no age-related differences in the discounting of delayed rewards, they did not examine the effects of income (Seaman et al., 2022). Accordingly, the present study compared discounting by y ... Full text Cite

Individual differences in degree of discounting: Do different procedures and measures assess the same construct?

Journal article Behavioural processes · May 2023 The present study compared the two most prominent procedures for measuring delay discounting, the Adjusting-Amount procedure and the Monetary Choice Questionnaire (MCQ). Of interest was whether the two procedures measure the same construct. Results obtaine ... Full text Cite

Social familiarity and reinforcement value: a behavioral-economic analysis of demand for social interaction with cagemate and non-cagemate female rats.

Journal article Frontiers in psychology · January 2023 Rats were studied in social reinforcement procedures in which lever presses opened a door separating two adjacent spaces, permitting access to social interaction with a partner rat. The number of lever presses required for social interaction was systematic ... Full text Cite

A behavioral-economic analysis of demand and preference for social and food reinforcement in rats

Journal article Learning and Motivation · February 1, 2022 Prior research has shown that responding can be maintained under concurrent food and social reinforcement in rats, but little is known about interactions between these reinforcers. In the present study, we approached the problem from a behavioral-economic ... Full text Cite

Failure to Find Altruistic Food Sharing in Rats.

Journal article Frontiers in psychology · January 2021 Prior research has found that one rat will release a second rat from a restraint in the presence of food, thereby allowing that second rat access to food. Such behavior, clearly beneficial to the second rat and costly to the first, has been interpreted as ... Full text Cite