Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

The effects of morphine on fixed-interval patterning and temporal discrimination.

A L Odum1, D W Schaal

  • 1West Virginia University, USA. aodum@hopper.unh.edu

Journal of the Experimental Analysis of Behavior
|October 12, 2000
PubMed
Summary

Morphine impaired pigeons' ability to discern time intervals and alter their response patterns. These findings suggest drug effects on behavior are not solely due to altered time perception.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Skinner may be difficult, but..

The Behavior analyst·2012
Same author

Reflections on the glass ceiling: women in the experimental analysis of behavior.

The Behavior analyst·2012
Same author

D-Amphetamine reinstates behavior previously maintained by food: importance of context.

Behavioural pharmacology·2004
Same author

The effects of morphine on chained and clocked fixed-interval schedule performance in pigeons.

Behavioural pharmacology·2002
Same author

Needle sharing in opioid-dependent outpatients: psychological processes underlying risk.

Drug and alcohol dependence·2000
Same author

Nicotine gum as a substitute for cigarettes: a behavioral economic analysis.

Behavioural pharmacology·2000

Area of Science:

  • Behavioral pharmacology
  • Animal behavior studies
  • Neuroscience

Background:

  • Drug effects on behavior are often linked to altered temporal discrimination.
  • Fixed-interval schedules reveal patterns in response rates over time.

Purpose of the Study:

  • To investigate the impact of morphine on pigeons' temporal discrimination and response patterning.
  • To test the hypothesis that drug-induced changes in response patterns stem from altered time perception.

Main Methods:

  • Pigeons were trained on a fixed-interval schedule with interpolated temporal discrimination tasks.
  • Morphine was administered at doses ranging from 1.0 to 10.0 mg/kg.
  • Response patterning (index of curvature) and accuracy in temporal discrimination were measured.

Related Experiment Videos

Main Results:

  • Morphine decreased the index of curvature during fixed intervals.
  • Morphine reduced accuracy in temporal discrimination trials for both short and long durations.
  • Accuracy was impaired equally across different time intervals.

Conclusions:

  • Morphine disrupts both response patterning and temporal discrimination in pigeons.
  • The results challenge the interpretation that morphine's effects on response patterning are solely due to overestimating elapsed time.
  • Drug-induced behavioral changes may involve broader mechanisms than just temporal perception alterations.