Science Daily: Alcohol dependence damages both episodic memory and awareness of memory.
“While it is striking that the alcoholic group had deficits in memory for new information, FOK analysis indicated that they were fundamentally unaware of their deficit. The over-estimation by the alcoholics of their memory ability was related to low performance on tests of executive function, which could either inhibit awareness or impair ability to retrieve information. In either case, there was a disconnection between feeling of knowing and accuracy of this knowledge.” So it’s not just the alcohol that makes them cocksure; it’s an actual cognitive deficit caused by the alcohol that remains in effect when they’re not drunk.
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