Citation

Farah MJ, Soso MJ, Dasheiff RM. J. Exp. Psychol. Hum. Percept. Perform. 1992; 18(1): 241-246.

Affiliation

Department of Psychology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213-3890.

Copyright

(Copyright © 1992, American Psychological Association)

DOI

unavailable

PMID

1532190

Abstract

Do mental images occur in a spatially mapped (i.e., analog, or array-format) representational medium? Kosslyn's (1978) method was used to measure the visual angle of "the mind's eye" to estimate the extent of the imagery medium before and after unilateral occipital lobectomy. It was found that the overall size of the largest possible image was reduced following the surgery. In addition, only the horizontal extent, and not the vertical extent, of the imagery medium was reduced. Finally, it was determined that the subject understood the tasks, was not aware of our predictions, and was unaffected by a strong demand characteristic in a different imagery task. These results are consistent with the hypothesis that imagery occurs in a spatially mapped representational medium dependent on occipital cortex.

Language: en