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Volume 32 (2014)
- Issue 3 Pages 139-
- Issue 2 Pages 43-
- Issue 1 Pages 1-
Volume 32, Issue 1
Displaying 1-4 of 4 articles from this issue
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Shigeto MIKI, Hiroshi NITTONO2014 Volume 32 Issue 1 Pages 1-10
Published: April 30, 2014
Released on J-STAGE: March 19, 2015
Advance online publication: August 12, 2014JOURNAL FREE ACCESSWhen a viewer allocates more attention to a video clip, content-unrelated probe stimuli elicit a smaller P3 (P300) component of event-related brain potentials. In the present study, this finding was replicated and extended by calculating correlation coefficients between subjective interest ratings for short video clips and electroencephalographic measures. Fifteen university students watched 12 movie trailers (M=143 s). Meanwhile, a non-painful electric pulse (0.2 ms) was sent to their left middle fingers once every 5 to 7 s, for which a button press with the left thumb was required. After viewing each trailer, participants completed a questionnaire. The composite score of 6 visual analog scales (interesting, attention-getting, like, pleasant, arousing, and want to see the movie) was used as the “interest” score. A stepwise regression analysis showed that both the probe-evoked P3 amplitude (β=-.20) and the occipital alpha-band power during stimulus-absent periods (β=-.29) accounted for the interest score. The results suggest that the single-stimulus electric probe method can be a promising protocol to obtain an objective index of viewers' interest.View full abstractDownload PDF (765K) -
Ryuji TAKEYA, Yasuko OKUMURA, Tetsuko KASAI2014 Volume 32 Issue 1 Pages 11-17
Published: April 30, 2014
Released on J-STAGE: March 19, 2015
Advance online publication: August 12, 2014JOURNAL FREE ACCESSFigures with illusory contours (IC) elicit a specific electrophysiological response in comparison with control figures at around 90–200 ms after stimulus onset. Although such IC effects have been considered to reflect automatic perceptual processing of IC in visual cortical areas, examinations are not sufficient. The present study examined effects of cognitive task load on the IC effect in event-related potentials (ERPs). ERPs were recorded from 17 participants who were presented with random sequences of IC and control figures, and digits while engaged in counting of digits (low-load task) and calculations (high-load task). As a result, only in the low-load condition, more negative ERPs in response to the IC figure were observed during 110–160 ms over right occipital-temporal electrode sites. The result suggests that cognitive load associated with calculations affected IC processing, thus the perceptual processing of IC may not be fully automatic.View full abstractDownload PDF (628K) -
Fumie SUGIMOTO, Jun'ichi KATAYAMA2014 Volume 32 Issue 1 Pages 18-28
Published: April 30, 2014
Released on J-STAGE: March 19, 2015
Advance online publication: October 18, 2014JOURNAL FREE ACCESSThis study investigated whether the amplitudes of the P300 component of the event-related potential (ERP) elicited by somatosensory and auditory probe stimuli reflect the difficulty of a tracking task. We examined if there was a large difference in the effect of the task difficulty between the two modalities. In the experiment, participants performed a tracking task while performing a somatosensory or auditory oddball task as a secondary task. Electrical stimuli to participants' wrists and fingers or two types of tone were presented as standard (probability .80) and target (.20) probe stimuli. Participants were required to respond to the target probe stimuli by pressing a mouse button. The amplitude of the P300 elicited by both somatosensory and auditory target stimuli decreased while participants were performing a difficult tracking task compared with when the task was easy. The present study showed that the P300s elicited by the somatosensory and auditory probe stimuli were equally sensitive to the amount of attentional resources allocated to a main task when the probe stimuli were presented in a secondary task.View full abstractDownload PDF (715K) -
Yuya MARUO, Hiroaki MASAKI2014 Volume 32 Issue 1 Pages 29-40
Published: April 30, 2014
Released on J-STAGE: March 19, 2015
Advance online publication: November 13, 2014JOURNAL FREE ACCESSWe investigated the effect of punishment on performance monitoring by having participants perform a spatial Stroop task in both a non-punishment (i.e. control) and a punishment condition where they received one of two unpleasant noises (two 90 dB recordings of scratching a blackboard with nails) one second after an erroneous response. We examined both the error-related negativity (ERN) and the error positivity (Pe) amplitudes across conditions as well as correlations among scores on the behavioral inhibition/behavioral activation system (BIS/BAS) scales, performance indices, ERN, and Pe amplitudes. Although the ERN amplitudes did not differ between conditions, Pe amplitudes was larger in the punishment condition than in the non-punishment condition. In addition, there were moderate negative correlations between Pe amplitudes and BAS scores such that individuals with higher BAS scores exhibited smaller Pe amplitudes in general regardless of the condition. The present results suggest that the punishment of unpleasant-noise increased awareness of errors and supports the notion that the Pe may represent evaluation of error responses.View full abstractDownload PDF (775K)
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