The aim of the present study was to examine background factors of non-attainment on a test of special notations in Japanese in relation to low performance on tests of phonological awareness, verbal short-term memory, and fluent searching of words printed in hiragana. The participants were 1,373 elementary school students from 6 schools in Tokyo. The test of special notations included items on
hatsu-on (pronunciation),
soku-on (double consonants),
yo-on (2-kana syllables), and
yocho-on (long vowels). Many of the children whose performance was in the 10th percentile of total scores on the test of special notations also made more errors on the
hatsu-on and
soku-on tasks, compared to the children whose performance was in the 11th to 20th percentile. Receiver Operating Characteristic (ROC) analysis indicated that the children whose results were at approximately the 10th percentile on the test of special notations were likely to be children who had been judged by their classroom teachers in the 1st and 3rd grades as having special educational needs with respect to special notations. The children whose performance was below the 10th percentile on the special notations test had lower performance on the less frequently used
yo-on and
yocho-on words compared to words used more frequently in first-grade Japanese-language-class textbooks. This suggests that the children whose performance was at the 10th percentile might not have applied the rules of constructing special notations to acquire
yo-on and
yocho-on, but, instead, relied on their experience of learning notation and sound as paired associates. An analysis of background factors of those children whose results showed non-attainment of special notations indicated that relatively common factors were found for each type of special notation. For the 1st graders, a low function of phonological awareness was a background factor. For the 2nd and 3rd graders, low performance on hiragana word-searching tests and verbal short-term memory were background factors. These results suggest that supportive instruction that considers children's background factors might be an effective way to teach them special notation.
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