Syoichi Iwasaki

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This study investigated the influence of positive affect on attentional blink (AB) with schematic faces. Results of Experiment 1 showed that the AB effect was smaller for both upright and inverted positive face icons than other face icons (neutral and angry faces) of corresponding orientations, confirming and extending the results of the earlier study by(More)
We assessed achromatic luminance and isoluminant chromatic contrast sensitivity functions of a 20-year-old male. He showed severe motor and intellectual disabilities after advanced adrenoleukodystrophy, which started at the age of 7. Optokinetic nystagmus (OKN) to drifting gratings was used to assess his contrast sensitivities. Although the achromatic(More)
In the present study, self-paced reading and event-related potential experiments were conducted to explore the roles commas play in reading complex sentences in Japanese, a language in which punctuation rules are less strictly imposed. The results strongly indicated that commas could immediately activate a complex-sentence structure and affect the(More)
We conducted two studies to develop a Japanese version of the Personal Growth Initiative Scale-II (PGIS-II), and examined its reliability and validity. PGIS-II was developed as a multidimensional measure of the multiple processes of the Personal Growth Initiative (PGI). The PGI describes an active, intentional engagement in the process of personal growth(More)
The six attentional-style subscales of the Test of Attentional and Interpersonal Style (TAIS, Nideffer, 1976) have been used mainly in the sport psychology area to investigate the relationship between attentional abilities and performance. This study assessed the validity of the Japanese version of the TAIS attentional-style subscales with 157 male and 163(More)
We attempt to evaluate the residual visual capacities of nine patients (seven males and two females; age range 4 to 35 years, mean 13.8 +/- 9.98) with cerebral visual impairment coupled with severe motor and intellectual disabilities by their contrast sensitivities to sine-wave gratings. Two methods were used for detecting the occurrence of ocular responses(More)
Six primary screening test items (grip strength, skin temperature, Nail-Press test, pain sense, and vibration sense at 125 Hz and at 250 Hz) for the vibration syndrome were assessed for validity and reliability using four measures: correlation with working time in years with vibrating tools; degree of relationship with four major complaints (Raynaud's(More)
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