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March 1959

Cognitive Changes Following Temporal Lobectomy for Relief of Temporal Lobe Epilepsy

AMA Arch NeurPsych. 1959;81(3):299-309. doi:10.1001/archneurpsyc.1959.02340150031004
Abstract

Problem  In a preliminary study by Meyer and Yates,1 it was reported that after temporal lobectomy some intellectual changes take place and that evaluation of the effects of the operation requires a breakdown into dominant and nondominant groups. The present investigation is an attempt to confirm the tentative findings of the preliminary study on larger samples of dominant and nondominant patients, to define more closely the nature of deficits, and to assess long-term effects.

Tests and Testing Procedures  The three intelligence tests described in the preliminary study, i. e., the Wechsler-Bellevue Intelligence Scale, the Mill Hill Vocabulary Test, and Raven's Progressive Matrices, have been retained. Six new learning tests were designed in order to answer the problems concerning learning ability. The New Word Learning and Retention Test (NWLT) has also been retained, as it is the original test on which the deficit was detected. This test involves learning of

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