•  
  •  

Home > TPR > Vol. 50 (2000) > Iss. 1

 

Document Type

Article

Abstract

Two groups of rats were trained to press the lever in a serial
feature-ambiguous (FA) task. A feature stimulus (X) signaled
reinforcement during one target stimulus that was otherwise
nonreinforced (a feature-positive or FP discrimination component),
but X signaled nonreinforcement during another target stimulus
that was otherwise reinforced (a feature-negative or FN
discrimination component). Two different reinforcers, pellets and
sucrose solution, were employed for the FP and FN components
in a differential outcomes group, whereas they were randomly
chosen for the FP and FN components in a mixed outcomes
group. The differential group showed better discrimination
performance than the mixed group. Implications for underlying
mechanisms of the DOE in general and of conditioned modulation
are discussed.


Download

Share

COinS