![]() ![]() Proactive interference happens when old information hinders the recall of newly. Complementary data collected in a small sample of Korsakoff's amnesic subjects are also described. In cases of brain trauma or disease, forgetting may be due to amnesia. The distribution of errors made in learning the second list, as well as the correlations between performance in learning the second list and a Stroop test, suggest that sensitivity to PI in ACoA amnesics could be the consequence of an inability to suppress irrelevant information at retrieval due to defective inhibitory attentional mechanisms. Because older memories are often better rehearsed and more strongly cemented in long-term memory, it is often easier to recall previously learned information rather than more recent learning. I), even when performance of both groups in the learning of the first list was equated (Exp. Proactive interference is when older memories interfere with the retrieval of newer memories. It appeared that ACoA patients, like diencephalic and temporal amnesics, did indeed display a marked sensitivity to PI when compared to normals (Exp. ![]() proactive and retroactive inhibition remains relatively unimpaired (Barber, 1969. This question was reexamined by enrolling patients with an operated aneurysm of the anterior communicating artery (ACoA) and matched controls for an AB/AC learning task of two lists of 12 paired-associate words. Key words: posthypnotic amnesia, brain injury, simulation, memory. Moreover, it is an open question whether such sensitivity to PI is an obligatory feature of amnesia, or rather an incidental result of frontal damage often reported in amnesics. There exists considerable controversy about the nature of this sensitivity to PI. Diencephalic and temporal amnesics display an excessive sensitivity to proactive interference (PI) in memory tasks of the AB/AC kind.
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