Effects of angularity of the figures with sharp and round corners on visual evoked potentials

Ito, Motoo; Sugata, Tatsuya; Kuwabara, Hiroshi; Wu, Chiajong; Kojima, Kazuyuki

doi:10.1111/1468-5884.00108

Cited by 7 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the P2 component was consistently driven when the square figures were presented at the outer eccentricity, i.e., 12°. Ito and Sugata (1995), Ito et al (1997Ito et al ( , 1998Ito et al ( , 1999 reported that the amplitude of the component around 100 ms increased according to the sharpness of angularity, but did not offer an explanation about that of the later component above 200 ms. Studying contour perception, Brandeis and Lehmann (1989) reported that the perception of a subjective contour figure induced topographic changes in the anterior-posterior direction and an increase of field strength at latencies of 168-376 ms, even in passive looking.…”

Section: Pattern Recognition In Peripheral Vision Evaluated By Erp Tomentioning

confidence: 94%

“…The brain activity evoked by geometric figures has been examined in previous VEP studies (Ito and Sugata, 1995;Ito et al, 1997Ito et al, , 1998Ito et al, , 1999. These studies made clear that the sharpness of angularity is related to the amplitude of the early evoked potential.…”

Section: Pattern Recognition In Peripheral Vision Evaluated By Erp Tomentioning

confidence: 99%

“…Therefore, different retinal stimulation might also induce different neural activity in later time periods after stimulation. Ito and Sugata (1995), Ito et al (1997Ito et al ( , 1998Ito et al ( , 1999 reported that early evoked potentials around 100 ms were related to the degree of angularity. In other words, amplitude increased as the sharpness of angularity increased.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Topographic change in ERP due to discrimination of geometric figures in the peripheral visual field

Shoji

Ozaki

2006

International Journal of Psychophysiology

View full text Add to dashboard Cite

Section: Pattern Recognition In Peripheral Vision Evaluated By Erp Tomentioning

confidence: 94%

Section: Pattern Recognition In Peripheral Vision Evaluated By Erp Tomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Topographic change in ERP due to discrimination of geometric figures in the peripheral visual field

Shoji

Ozaki

2006

International Journal of Psychophysiology

View full text Add to dashboard Cite

“…A triangular pattern had an even higher response than a circle and a square [13]. Sharp corners in patterns had a quicker response than rounded corners [14,15]. Sharpness of patterns were also important; sharp patterns produce quicker visual 2 of 18 response than blurred ones [12].…”

Section: Introductionmentioning

confidence: 95%

The Concept of Psychotextiles; Interactions between Changing Patterns and the Human Visual Brain, by a Novel Composite SMART Fabric

Stylios

Chen

2020

Materials

View full text Add to dashboard Cite

A new SMART fabric concept is reported in which visual changes of the material are designed to influence different human emotions. This is achieved by developing a novel electrochromic composite yarn, knitted into pattern-changing fabrics, which has high response in temperature change and uniform contrast. The influence of these pattern-changing effects on the response of the human visual brain is investigated further by using event-related potential (ERP). Four SMART pattern-changing fabric pairs were used in this experiment. Each fabric presents two patterns interactively with different, but complementary or opposing, pattern attributes. 20 participants took part in the experiment, in which they were exposed to the patterns, while their visual brain activities were recorded. Comparisons of the three prominent ERP components; P1, N1, and P2 that correspond to the two patterns of each fabric have shown significant differences in the latency and amplitude of these components. These differences show that patterns and pattern-changing cause different visual impacts and that these changes influence our level of attention and processing effort. The study concludes that with the pattern changing ability of these thermochromic hybrid materials we can create designs with attributes that can directly manipulate user emotions, which we like to call ‘psychotextiles’. Our study also poses much wider questions of our image processing process in relation to design and art.

show abstract

“…A similar effect was shown on a positive (P2) wave (averaged peak latency: 240ms), although it was not as distinctive as in the N1 wave. Ito, Sugata, Kuwabara, Wu, and Kojima (1999) adopted the analytical approach and examined the effect of single-lined angular figures with sharp and round corners on transient VEPs. They found that the N1 amplitude tended to decrease as a function of angularity.…”

mentioning

confidence: 99%

Effects of the sharp and round parts of geometric figures on visual evoked potentials

Ito¹,

Sugata²,

Kuwabara³

1998

Jpn. J. Physiol. Psychol. Psychophysiol.

Self Cite

View full text Add to dashboard Cite

Following the studies of Ito et al. (1993Ito et al. ( , 1995, in which equilateral triangle elicited larger N1 responses compared to square and circle, we compared the effects of partial forms of triangle and circle, in order to understand the roles of three angular parts of triangle. Two groups of sharp or round figures were tachistoscopically presented to the lower visual field for eight subjects. One consisted of an equilateral triangle and its three sharp parts, the other of a circle and its three round parts. Transient VEPs were obtained monopolarly at five locations around occipital area.Subtracted waves between figure and control (blank) conditions were computed and analyzed. As a main result, any three sharp parts of triangle elicited significantly larger N1 amplitudes than did the corresponding round parts of circle, while the triangle was of a significantly larger N1 amplitude than the circle. Thus, the increase of the N1 response for equilateral triangle as compared to circle could be attributable to the N1 increases for all the three acute-angled parts of triangle.Key words: form perception, transient visual evoked potential, geometric figure, sharpness and roundness of parts, whole and parts 1) Main parts of the present data were presented at the 58th Annual Convention of the Japanese Psychological Association held at Nihon University, Tokyo, October 1994. 2) Thanks are expressed to Prof. K. Tsuji of Nagoya University and Prof. M. Kida of Aichi Gakuin University for their advice and encouragement and to Prof. W. B. Redekop of Aichi Gakuin University for his careful proofreading of this manuscript. E-mail may be addressed to motoogdpc.aichi-gakuin.ac.jp. 3) Now at Nagoya Welfare College (Nagakute-cho, Aichi-gun, Aichi 480-1100, Japan). 4) Now at Mie National Hospital (Osatokubota-cho, Tsu 514-0125, Japan).

show abstract

Effects of angularity of the figures with sharp and round corners on visual evoked potentials

Cited by 7 publications

References 11 publications

Topographic change in ERP due to discrimination of geometric figures in the peripheral visual field

Topographic change in ERP due to discrimination of geometric figures in the peripheral visual field

The Concept of Psychotextiles; Interactions between Changing Patterns and the Human Visual Brain, by a Novel Composite SMART Fabric

Effects of the sharp and round parts of geometric figures on visual evoked potentials

Contact Info

Product

Resources

About