漸次的マスク解除課題を用いた漢字二字熟語の認知における近傍語群の活性化過程に関する検討(<特集>高次視覚における認知と理解)

概要

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Japanese two-kanji compound words (Jukugo : e.g.,侵略"invasion") have two sets of neighbors : rear neighbors that share the same kanji in the front (e.g.,侵入"intrusion") ; and front neighbors that share the same kanji at the rear of the Jukugo (e.g.,侵略"strategy"). A neighbor of higher frequency is represented as a "+ neighbor", whereas a neighbor of a lower frequency is a "- neighbor". We investigated the neighborhood frequency effect of rear neighbors (R+/R-) and front neighbors (F+/F-) in Jukugo identification by using a progressive demasking task, where the pattern mask degraded the visibility of a presented Jukugo. The position of the pattern mask was either of four types : front, rear, whole, and no position. The results indicated that in the whole and the front mask conditions, Jukugo in the F-R+ condition yielded longer reaction times than those in the other conditions. In the rear mask condition however, a difference in reaction times for the F-R+ and F+R+ conditions was not observed. The results are discussed in terms of two activation processes : a local activation of a rear neighbor of higher frequency and a global activation of a front neighbor.
2007-09-30