Reinforcement omission in concurrent fixed-interval and random-interval schedules

Taku Ishii, Takayuki Sakagami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The present experiment examined overall and local effects of omission of reinforcers in a choice situation. Pigeons' key-pecking responses were reinforced under concurrent fixed-interval and random-interval schedules of food presentation. After some weeks of baseline sessions in which the probability of reinforcement was 1.00, approximately 25% of food presentations from the fixed-interval schedule were omitted and replaced by timeout periods. In such omission sessions, the overall relative rates of responding to the fixed-interval schedule became lower than those in the baseline sessions. On the other hand, when relative rates of responding to the fixed-interval schedule in the omission sessions were calculated separately for fixed-interval cycles preceded by timeout periods and those preceded by food presentations, the relative rates in the former type of fixed-interval cycles were higher than those in the latter type for three out of four pigeons. These results mean that relative rates of responding cannot always be regarded as reflecting a relative value of an alternative, and that the overall effect of the omission of fixed-interval reinforcers is not reducible to the local effect of omission.

Original languageEnglish
Pages (from-to)334-341
Number of pages8
JournalBehavioural Processes
Volume74
Issue number3
DOIs
Publication statusPublished - 2007 Mar

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pigeons
reinforcement
Appointments and Schedules
pecking
Columbidae
Food
food
rate
effect
experiment

Keywords

  • Choice behaviour
  • Key peck
  • Pigeon
  • Reinforcement schedule

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics
  • Behavioral Neuroscience

Cite this

Reinforcement omission in concurrent fixed-interval and random-interval schedules. / Ishii, Taku; Sakagami, Takayuki.

In: Behavioural Processes, Vol. 74, No. 3, 03.2007, p. 334-341.

Research output: Contribution to journalArticle

Ishii, Taku ; Sakagami, Takayuki. / Reinforcement omission in concurrent fixed-interval and random-interval schedules. In: Behavioural Processes. 2007 ; Vol. 74, No. 3. pp. 334-341.
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