The correlation between probe P3 amplitude and degree of interest in movie trailers
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1
Hiroshima University, Graduate School of Integrated Arts and Sciences, Japan
Aims: The amplitude of the P3 (P300) component of event-related potential (ERP) has been used as an index of the perceptual-central attentional resources allocated to eliciting stimuli. Using a secondary-task technique, a previous study showed that P3 amplitude elicited by auditory probe stimuli was lower when participants were viewing interesting movie clips than when they were viewing neutral movie clips. In our study, we examined whether P3 amplitude is proportionally related to the degree of interest in short movie clips. To eliminate stimulus masking at the perceptual level, somatosensory probe stimuli were used. Method: Fifteen university students were asked to watch 12 movie trailers (M = 143 s). Meanwhile, a non-painful electric pulse (0.2 ms) was sent to their left middle fingers once per five to seven seconds (M = 6 s). The participants responded with the left thumb as quickly as possible whenever they felt the stimulus. After viewing each trailer, participants completed subjective impression ratings on nine visual analog scales (0–100). A composite “interest” score and ERP waveforms in response to probe stimuli were calculated for each movie trailer. A temporal-spatial principal component analysis was applied to the ERP waveforms to obtain a component score corresponding to probe P3 amplitude for each trailer. Results: P3 was identified as a principal component peaking at 390 ms with a central scalp distribution. The component score of the P3 was negatively correlated with the composite interest score (r = -.22, p = .003). Conclusions: The results suggest that viewers allocate more attention to movie clips that interest them, as the amplitude of the P3 elicited by somatosensory probe stimuli is inversely related to the degree of interest in movie clips.
Keywords:
ERPs (Event-Related Potentials),
Interest,
Somatosensory Evoked Potentials (SEP),
movie,
P300
Conference:
ASP2013 - 23rd Annual meeting of the Australasian Society for Psychophysiology, Wollongong, Australia, 20 Nov - 22 Nov, 2013.
Presentation Type:
Poster Presentation
Topic:
Attention
Citation:
Miki
S and
Nittono
H
(2013). The correlation between probe P3 amplitude and degree of interest in movie trailers.
Conference Abstract:
ASP2013 - 23rd Annual meeting of the Australasian Society for Psychophysiology.
doi: 10.3389/conf.fnhum.2013.213.00028
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Received:
24 Oct 2013;
Published Online:
05 Nov 2013.
*
Correspondence:
Mr. Shigeto Miki, Hiroshima University, Graduate School of Integrated Arts and Sciences, Higashi-Hiroshima, Japan, shigeto-mst@hiroshima-u.ac.jp