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Psychopharmacologia

, Volume 11, Issue 5, pp 397–404 | Cite as

The effects of amphetamines upon judgments and decisions

  • Paul M. Hurst
  • Marianna Fry Weidner
  • Robert Radlow
Original Investigations

Summary

D-amphetamine sulfate, dl-amphetamine sulfate, and placebo were orally administered to 93 college student volunteers who served as their own controls in a Latin Square design. Dosages were adjusted to the two-thirds power of body weight with the proportionality constant set for 14 mg/70 kg with each drug. Effects were measured upon performances in a mathematical reasoning test, upon self-appraisals of these performances, and in a task which attached monetary payments to the accuracy of self-appraisals (“Decision Score”). The objectives of this research were (1) to reassess the biases in performance self-appraisals reported by Smith and Beecher (1964), and (2) to determine whether these biases represent mere verbal expansiveness or whether they are reflected by changes in decision behavior.

Smith and Beecher's effect upon self-appraisals was confirmed (at p<.02). Decision Score also was affected (at p<.01) in the predicted direction. Performance scores were not significantly affected.

Keywords

Sulfate Placebo Body Weight College Student Amphetamine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer-Verlag 1967

Authors and Affiliations

  • Paul M. Hurst
    • 1
  • Marianna Fry Weidner
    • 1
  • Robert Radlow
    • 1
  1. 1.Institute For ResearchState College

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