The behavior systems framework suggests that motivated behavior—eg, seeking food and
mates, avoiding predators—consists of sequences of actions organized within nested …

Abstract Amazon Mechanical Turk (MTurk) is a crowdsourcing marketplace providing
researchers with the opportunity to collect behavioral data from remote participants at a low …

Reinforcement learning inspires much theorizing in neuroscience, cognitive science,
machine learning, and AI. A central question concerns the conditions that produce the …

Paradoxical choices in human and nonhuman animals represent substantial deviations from
rational models of behavior; such deviations often demand models that incorporate multiple …

Rats' performance on a progressive-ratio schedule maintained by sucrose (0.6 M, 50 μl) and
corn oil (100%, 25 μl) reinforcers was assessed using a model derived from Killeen's (1994) …

The distribution of latencies and interresponse times (IRTs) of rats was compared between
two fixed-interval (FI) schedules of food reinforcement (FI 30 s and FI 90 s), and between two …

Two experiments were conducted to assess the effect of lever height on lever pressing that
was not explicitly reinforced–ie, operant-level responding. Two rodent species were used as …

Operant behavior can reflect the influence of goal‐directed and habitual processes. These
can be distinguished by changes to response rate following devaluation of the reinforcing …

Transition from the highest rate of lever-pressing activity during the unloading (extinction)
phase of a cocaine self-administration session to an extremely low activity rate during the …

Response bouts are clusters of responses that occur in rapid succession and are
punctuated by pauses during which the response does not occur. Under variable interval …