Electrophysiological Dynamics of the Development of Automatic Reading.
Abstract: Previous ERP studies have mapped the time course of automatic visual
word recognition in adults (e.g., Holcomb & Grainger, 2006) and recent work extends
this research to children (Eddy, Grainger, Holcomb, Mitra, & Gabrieli, submitted). In
an ERP masked priming paradigm, we investigated sublexical and lexico-semantic processing
as indexed by the N250 and N400 repetition priming effect... read mores, respectively. We then used
multiple regression models of reading abilities to predict the size of these priming
effects. Children showed similar N250 and N400 priming effects to those seen in adults, but
the N250 priming effect started somewhat later in developing readers. Somewhat
surprisingly, developing readers did not show overall differences in the amplitude of the
N250 and N400 priming effects across age groups. However, the size of these priming effects
was predicted by reading skill. Adults' N400 effects were related to their reading fluency.
In children, orthographic skills predicted the size of their early and late N250 priming
effects and lexical/semantic knowledge predicted the size of their N400 effect. This
suggests that the changes in the component processes of word reading indexed by the ERP
waveform are more closely tied to the development of reading ability than to
Thesis (M.S.)--Tufts University, 2013.
Submitted to the Dept. of Psychology.
Advisor: Phillip Holcomb.
Committee: Marianna Eddy, and Katherine Midgley.
Keyword: Cognitive psychology.read less