28th International Congress of Psychology August 8 ... - U-netSURF

Ordinarily, it is not time when stimulus is displayed but that instructions for display are called.
Actually, both are asynchronous because of randomly interrupted programs for display by
multitask operating system and monitor scan restriction. Stimulus is not presented immediately
when instructions are implemented. Therefore an interval between stimulus display and timing
onset is made. Decreasing the interval can improve timing accuracy, but precision and
compatibility are dissatisfying. By getting stimulus display as timing onset, soft solution in this
paper makes stimulus display and timing onset synchronous.
1028.137 A software method for more effectively raising timing accuracy, Suhua Chen,
Shuiqing Xie, Zhongle Yang, South-central University for Nationalities, China
Timing accuracy is dissatisfying when keyboards and mouse are used directly in reaction time
experiments. Both low accuracy of DOS clock and time delay of Windows message response lead
to poor timing accuracy. External millisecond accuracy timer used to raise accuracy on DOS
brings inconvenience. Time delay of Windows message response cannot yet be avoided by many
methods for raising timing accuracy. In this paper, a new software method is presented, which
removes time delay of Windows message response by directly accessing input data of keyboards
and mouse. The result shows timing accuracy is raised to less than 1msec.
1028.138 Research on computerized adaptive test: How to estimate the level of one’s latent traits
in two points recorded test, Taofeng Zhou, Qingliang Chen, Wen Pei, Mingqin Chen, Weinan
Zeng, Guizhou Normal University, China
In recent years, Computerized Adaptive Test has developed rapidly. Many basic theories have
been appreciated by many psychologists, but it has not been very perfect. Especially, the problem,
how to estimate the level of one's latent traits with the Item Characteristic Function, has not been
resolved. Estimating the level of one's latent traits in two points recorded test is the simplest
circumstance, so the study on it is very important.
1028 POSTER
SENSORY AND MOTOR PROCESSES
1028.139 Auditory attention at periphery detected from human scalp potentials, Kazunari Ikeda 1 ,
Akiko Hayashi 1 , Takahiro Sekiguchi 1 , Shukichi Era 2 , 1 Tokyo Gakugei University, Japan;
2
Joetsu University of Education, Japan
In humans attention effects at the auditory periphery have been detected by measuring evoked
otoacoustic emissions. The present study tried to detect the peripheral attention effect from human
scalp potentials. To achieve this purpose, a new measure responsive to displacements of human
scalp potentials was developed. Twelve participants each experienced two conditions either
ignoring or attending to tones. The measure revealed a significant magnitude difference between
the two conditions within a 13-ms period after the stimulus onset. These results suggest that the
peripheral effect of auditory attention can be found from human scalp potentials.
1028.140 Deveploping a quality of life instrument for patients with leukemia, Qiang Li, Guoan
Yue, Zhongchao Han, Zhijian Xiao, China
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