Time is a fundamental dimension of all biological events and it is often assumed that
animals have the capacity to track the duration of experienced events (known as interval …

The systematic anticipation and preservation errors produced by pigeons around the
reversal point in midsession reversal (MSR) learning experiments suggest that an internal …

The midsession reversal paradigm confronts an animal with a two-choice discrimination task
where the reward contingencies are reversed at the midpoint of the session. Species react to …

What are the mechanisms by which behavior is organized sequentially over time? The
recently developed mid-session reversal (MSR) task offers new insights into this …

We examined how biasing time perception affects choice in a midsession reversal task.
Given a simultaneous discrimination between stimuli S1 and S2, with choices of S1 …

The midsession reversal task involves a simultaneous discrimination between stimuli S1
and S2. Choice of S1 but not S2 is reinforced during the first 40 trials, and choice of S2 but …

In a 2-stimulus visual discrimination choice task with a reversal in reward contingencies
midway through each session, pigeons produce a surprising number of both anticipatory …

Inspired by Spence's seminal work on transposition, we propose a synthetic approach to
understanding the temporal control of operant behavior. The approach takes as primitives …

In a midsession reversal (MSR) task, animals are typically presented with a simple,
simultaneous discrimination (S1+, S2−) where contingencies are reversed (S1−, S2+) half …

Functionally distinct memory systems likely evolved in response to incompatible demands
placed on learning by distinct environmental conditions. Working memory appears adapted …