Discriminative stimuli that follow a delay have added value for pigeons

Kelly A. Digian, Andrea M. Friedrich, Thomas R. Zentall

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Clement, Feltus, Kaiser, and Zentall (2000) reported that pigeons prefer discriminative stimuli that require greater effort (more pecks) to obtain over those that require less effort. In the present experiment, we examined two variables associated with this phenomenon. First, we asked whether delay of reinforcement, presumably a relatively aversive event similar to effort, would produce similar effects. Second, we asked whether the stimulus preference produced by a prior relatively aversive event depends on its anticipation. Anticipation of delay was accomplished by signaling its occurrence. Results indicated that delays can produce preferences similar to those produced by increased effort, but only if the delays are signaled.

Original languageEnglish
Pages (from-to)889-895
Number of pages7
JournalPsychonomic Bulletin and Review
Issue number5
StatePublished - Oct 2004

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)


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