Influence of encoding focus and stereotypes on source monitoring event related potentials
Source memory, memory for the origin of a memory, can be influenced by stereotypes and the information of focus during encoding processes. Participants studied words from two different speakers (male or female) using self focus or other focus encoding. Source judgments for the speaker's voice and Event Related Potentials (ERPs) were recorded during test. Self focus encoding increased dependence on stereotype information and the Late Posterior Negativity (LPN) The results link the LPN with an increase in systematic decision processes such as consulting prior knowledge to support an episodic memory judgment. In addition, other focus encoding increased conditional source judgments and resulted in weaker old/new recognition relative to the self focus encoding. The putative correlate of recollection (LPC) was absent during this condition and this was taken as evidence that recollection of partial information supported source judgments. Collectively, the results suggest that other focus encoding changes source monitoring processing by altering the weight of specific memory features.
Brain Research