Abstract：
:Recognition memory studies have shown that increased perceptual fluency results in more "old" responses and, presumably, increases familiarity. However, the exact neural mechanisms of these effects remain unresolved. We conducted two ERP experiments in which participants encoded words and performed a recognition test where fluency was manipulated by changing clarity of test words (half of them were clear or blurry). In the more demanding Experiment 1, we found a reversed effect of fluency on recognition (more hits for blurry words), which was accompanied by larger N400 and LPC old/new effects for blurry words. For high confidence responses, the topography of N400 shifted towards frontal electrodes (the FN400 for blurry words). In the less demanding Experiment 2, no behavioral differences between clear and blurry words were observed. However, there was a discrepancy in the ERP results, with the frontal FN400 for blurry words and the parietal N400 for clear words, suggesting that distinct neural pathways can support familiarity-based recognition for clear and blurry items. In both experiments, early perceptual fluency ERP effects were also observed. The results indicate that both semantic processing and familiarity can be enhanced by perceptual fluency and contribute to recognition judgments, depending on the interpretations of fluency.
journal_name
Brain Cognjournal_title
Brain and cognitionauthors
Stróżak P,Leynes PA,Wojtasiński Mdoi
10.1016/j.bandc.2020.105661subject
Has Abstractpub_date
2020-12-24 00:00:00pages
105661eissn
0278-2626issn
1090-2147pii
S0278-2626(20)30264-5journal_volume
147pub_type
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