Reading focus
Syllabus: How Do Consequences Shape Action?
Follow response allocation across two simultaneously available options and examine the role of the changeover delay.
Why you’re reading it. Introduce a quantitative relation between behavior and its alternatives, while keeping its procedural conditions in view.
A question to consider. Compare this experiment with Zuriff’s. Which change in the availability of alternatives prevents you from assuming that their response proportions should obey the same relation?
Why this reading
Choice brings the alternatives into the explanation. This experiment relates the share of responses allocated to each option to its share of obtained reinforcement, providing the original empirical formulation associated with the matching law.
Before you read
Concurrent variable-interval schedules make two options available together. Relative response rate is the fraction of all responses made on one option; relative reinforcement rate is the corresponding fraction of obtained reinforcements. A changeover delay temporarily prevents reinforcement just after switching options.
Read for
- Track which reinforcement rates vary and how the combined scheduled rate is held constant.
- Compare absolute response rates with response proportions, and distinguish an approximate aggregate relation from a rule specifying each individual choice.
- Examine the changeover delay and the author’s discussion of why switching requirements matter for the observed relation.
Consider afterwards
- An option supplies 75% of obtained rewards. What response allocation would simple matching predict, and why does that prediction not specify the next response or prove that the animal maximizes rewards?
Editorial context
This is a three-pigeon experiment under particular concurrent schedules, including a 1.5-second changeover delay. The author discusses procedural conditions that support matching rather than presenting it as inevitable. Baum (1974) extends the account to bias and departures in sensitivity. A useful quantitative description still needs an account of how behavior produces the observed relation and when it should fail.