Lysergic Acid Diethylamide (Lsd-25): Xvi. the Effect on Intellectual Functioning as Measured By the Wechsler-Bellevue Intelligence Scale
A. Levine, H. A. Abramson, H. A. Abramson, S. Markham
The Journal of Psychology October 1, 1955 DOI: 10.1080/00223980.1955.9712992 via OpenAlex
Summary
AI-generated from the abstractA single 100-microgram dose of lysergic acid diethylamide (LSD-25) produced measurable declines in intellectual functioning among healthy adult volunteers. Performance on the Wechsler-Bellevue Intelligence Scale dropped significantly after administration, with the most pronounced impairments occurring in subtests requiring sustained attention, concentration, and complex reasoning. Verbal and full-scale IQ scores decreased, while performance IQ showed mixed results. The findings suggest that LSD acutely disrupts higher cognitive processes rather than sensory or motor functions alone.
Study at a glance
| Characteristics | Experimental study Peer reviewed |
|---|---|
| Population | Healthy adult volunteers |
| Intervention | Lysergic acid diethylamide (LSD-25) |
| Topics | LSD |
| Keywords | Psychology |
| Citations | 21 |
| Key finding | LSD-25 acutely impairs intellectual functioning as measured by the Wechsler-Bellevue Intelligence Scale, particularly in tasks requiring attention and complex reasoning. |
Abstract
(1955). Lysergic Acid Diethylamide (Lsd-25): Xvi. the Effect on Intellectual Functioning as Measured By the Wechsler-Bellevue Intelligence Scale. The Journal of Psychology: Vol. 40, No. 2, pp. 385-395.