Visual masking by light offset: An experiment in reply to Hogben and DiLollo.

Abstract
In an experiment with 6 normally seeing undergraduates, a lighted background field was shut off (MS) at varying intervals either before, during, or after presentation of a grapheme (TS). A forced-choice procedure was used. A performance decrement was observed when MS occurred at TS onset, as well as during and immediately after TS. J. Hogben and V. DiLollo's (see record) contention that light onset is responsible for masking in this paradigm is discussed. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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