Evidence map›Paper›PMID 19159161›Full record

ArticleJournal of experimental psychology. Animal behavior processes2009

Progressive ratio schedules of reinforcement.

Peter R Killeen, Diana Posadas-Sanchez, Espen Borgå Johansen, Eric A Thrailkill

Erratum issuedAbstract read
In one paragraph

Article in Journal of experimental psychology. Animal behavior processes, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

37 citing papers in PubMed.

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  6. Inhibition of striatal indirect pathway during second postnatal week leads to long-lasting deficits in motivated behavior.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2025
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  14. Conditioned enhancement of the nicotine reinforcer.Experimental and clinical psychopharmacology · 2021
    Article
  15. Article
  16. Review
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  20. Article
4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

4 authors.

Peter R KilleenDepartment of Psychology, Arizona State University, Tempe, AZ 85287-1104, USA. Killeen@asu.edu
Diana Posadas-Sanchez
Espen Borgå Johansen
Eric A Thrailkill

Funding

Dynamic Models of ReconditioningR01MH066860 · NIMH · ARIZONA STATE UNIVERSITY-TEMPE CAMPUS · PI KILLEEN, PETER R · 2003 to 2006
$637k
NIMH NIH HHS R01 MH066860NIMH NIH HHS R01MH066860
6 · The paper itself

Abstract

Pigeons' pecks produced grain under progressive ratio (PR) schedules, whose response requirements increased systematically within sessions. Experiment 1 compared arithmetic (AP) and geometric (GP) progressions. Response rates increased as a function of the component ratio requirement, then decreased linearly (AP) or asymptotically (GP). Experiment 2 found the linear decrease in AP rates to be relatively independent of step size. Experiment 3 showed pausing to be controlled by the prior component length, which predicted the differences between PR and regressive ratio schedules found in Experiment 4. When the longest component ratios were signaled by different key colors, rates at moderate ratios increased, demonstrating control by forthcoming context. Models for response rate and pause duration based on Bizo and Killeen (1997) described performance on AP schedules; GP schedules required an additional parameter representing the contextual reinforcement.

Indexed as

Reaction TimeReinforcement ScheduleAnimalsBehavior, AnimalColumbidaeMaleModels, Psychological

Identifiers

PMID19159161
PMCPMC2806234

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.