Pigeons' responses in the presence of two concurrently available (initial‐link) stimuli
produced one of two different (terminal‐link) stimuli. The rate of reinforcement in the …

Pigeons' responses in the presence of two concurrently available (initial‐link) stimuli
produced one of two different (terminal‐link) stimuli according to identical but independent …

Pigeons' responses in the presence of two concurrently available (initial‐link) stimuli
produced one of two different (terminal‐link) stimuli according to identical but independent …

Pigeons' responses in the presence of two concurrently available (initial‐link) stimuli
produced one of two different (terminal‐link) stimuli. Entrance into the mutually exclusive …

The relative immediacy of reinforcement in concurrent‐chain schedules was varied while the
relative reduction in the overall average time to reinforcement associated with terminal‐link …

Pigeons' pecks in the presence of two concurrently available initial‐link stimuli occasionally
produced one of two stimuli associated with mutually exclusive terminal links. Pecks during …

In a two‐link, concurrent‐chain schedule, pigeons' pecks on each key during the initial link
occasionally produced a terminal link, during which only that key was operative. Responses …

Pigeons' responses on either of two concurrently available keys each associated with
variable‐interval 60‐sec schedules occasionally changed the schedule on that key to a …

Pigeons chose between fixed‐interval schedules of different durations presented in the
terminal links of concurrent‐chains schedules. The pair of schedules was always in the ratio …

The delay‐reduction hypothesis of conditioned reinforcement states that the reinforcing
value of a food‐associated stimulus is determined by the delay to primary reinforcement …