Neural correlates of cross-modal recognition memory by 8-month-old human infants.

Abstract

Examined the neural correlates of cross-modal recognition memory in 8-mo-old infants by using ERPs. Testing began by having all Ss feel (but not see) an object for 60 sec. Test trials then followed. Infants in Condition 1 received 15 presentations of a picture of the familiar object, followed by alternating pictures of that object and a novel object. Infants in Condition 2 received 15 presentations of a picture of the novel object, followed by the same test sequence as infants in Condition 1. Infants in Condition 3 were presented with 2 test trials during which looking times were recorded to pictures of the familiar and novel objects; they then received the same test sequence as infants in Conditions 1 and 2. Infants in Condition 4 were presented only with the same test sequence as infants in Conditions 1, 2, and 3. Only in Conditions 1 and 4 was a late positive slow wave invoked by the novel object (indicative of recognition memory), although infants in Condition 3 did show a significant looking preference for the novel object. These results are contrasted with previous studies examining the neural correlates of visual recognition memory.

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