English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this study, we examined the effects of introducing a delay of reinforcement on the rate and distribution of lever-pressing of eight rats under interval, ratio, and time reinforcement schedules (VI, VR, and VT). Following baseline conditions under immediate reinforcement, an unsignaled and nonresetting 5-s delay of reinforcement was introduced upon each of these schedules. Results showed that the delay was accompanied by a decrease in the rate of responses for all subjects, for all three schedules of reinforcement, most noticeable for VT, followed by the VI and then the VR schedules. A molecular analysis of the data revealed that, under VI, but not VR, the subjects' actual delay approximated the programmed value of 5 seconds. In general, results demonstrate that the effects of introducing a delay of reinforcement depend on the current reinforcement schedule. In the present study, in particular, response rate and response distribution under VI and VR, were followed by different effects of the delay when controlling respectively for time and ratio of responses.Keywords: contingency; contiguity; delay of reinforcement; schedules of reinforcement; rats

Contingência e contigüidade no responder de ratos submetidos a esquemas de razão, intervalo e tempo variáveis