Journal of Abnormal Child Psychology

, Volume 6, Issue 1, pp 25–32 | Cite as

Dextroamphetamine and placebo practice effects on selective attention in hyperactive children

  • Mary Ann Fisher


Three groups of three boys referred to a hospital study unit for evaluation of hyperactive behavior were tested on a classification task involving selective attention while on either dextroamphetamine (D) or placebo (P). In two sessions, groups had D first, P second (DP), or PD, or PP. Amphetamine reduces response times in general and reduces interference due to orthogonally varying irrelevant information. Practice while on placebo improves performance in a subsequent placebo session. Practice while on amphetamine does not, however, improve performance in the subsequent session on placebo. Assessment of the extent of the drug-state-related practice effect is necessary for evaluation of long-term benefits of dextroamphetamine therapy in these children.


Placebo Response Time Amphetamine Selective Attention Classification Task 
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Copyright information

© Plenum Publishing Corporation 1978

Authors and Affiliations

  • Mary Ann Fisher
    • 1
  1. 1.Department of PsychologyUniversity of Maryland Baltimore CountyBaltimore

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