This study developmentally approaches to the following questions in the recognition of letters: Recognizability of
Katakana,
Hiragana and
Kanji; sex difference; and horizontal and vertical compositions of letters. Experimental materials are three kinds of cancelling tests using three types of Japanese letters;
Katakana (straight-lined syllabary),
Hiragana (cursive syllabary) and
Kanji (idesgraph) referring to the same words composed of two letters. Results: (a) The order of better recognition achievement is
Hiragana,
Katakana and
Kanji during the age from six to eight years,
Hiragana,
Kanji and
Katakana at the age group of nine and ten years, and
Kanji,
Hiragana and
Katakana in and above the age of eleven years. (b) Female subjects are superior to males in recognition. (c) The horizontal composition is easier to be recognized than the vertical.
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