Erowid.org: Erowid Reference 1538 : Lysergic acid diethylamide (LSD-25): IV. Effect on attention and concentration. : Jarvik ME, Abramson HA, Hirsch MW

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Jarvik ME, Abramson HA, Hirsch MW. “Lysergic acid diethylamide (LSD-25): IV. Effect on attention and concentration.”. J. Psychol.. 1955;39:373. <a name="ref">Jarvik ME, Abramson HA, Hirsch MW.</a> <a href="/references/1538">"Lysergic acid diethylamide (LSD-25): IV. Effect on attention and concentration."</a> <i>J. Psychol.</i>. 1955;39:373.
Texts Abstract (this page) Full Text - Multiple (151 K) Full Text - English (456 K) Show Articles by Jarvik ME Abramson HA Hirsch MW Article IDs LSDID: 0072 Erowid RefID: 1538 PubMedID: unknown Collections Hofmann Collection MDMA Collection All References	Abstract The effects of LSD (50 and 100 mcg. orally) and placebo on attention and concentration were studied in 12 non-psychotic adults by means of various psychological tests (e.g. marking of particular figures in a mass of similar figures). 6 out of the 8 tests showed no significant difference between the scores after placebo and after 50 mcg. LSD. Two tests showed a significant difference between the scores after placebo and 100 mcg. LSD. The decreases in the scores after LSD would probably have been even more significant if it had been possible to rule out the effect of practice.
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