Abstract
46 patients undergoing electric convulsion therapy (ECT) and 12 controls were tested by rearous-ing verbal responses to pictures resembling each other, either concrete illustrations or ambiguous representations. When the ECT patients were shown concrete pictures before treatment or during the early confusional period, they responded quickly to ambiguous pictures seen in the confusional state. Well oriented subjects responded more slowly to ambiguous pictures after having seen concrete ones than if the ambiguous ones were seen alone.

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