Title:	EFFECTS OF LIGHT, TEXTURE, AND EXPERIENCE ON THE ERROR IN PERCEIVED LENGTH FOR A ROTATED THREE-DIMENSIONAL OBJECT
Author(s):	Kuo-Chen Huang
ISBN:	978-972-8939-74-8
Editors:	Yingcai Xiao
Year:	2012
Edition:	Single
Keywords:	Contexture, digital 3-D experience, distance estimation, light
Type:	Full Paper
First Page:	3
Last Page:	9
Language:	English
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Paper Abstract:	This study investigated the effects of light type (spot, directional, and point), forward-rotated stimulus angle (20°, 45°, and 70°), surface texture (wood, metal, transparent glass, dark brown leather, and translucent plastic), and three-dimensional (3-D) experience (experience and no experience) on the error in perceived length of an object. Forty-four female and 34 male Taiwanese college students [age range, 18–23 years (M = 20.2, standard deviation = 1.4] participated in the current study. Participants were asked to judge the vertical distance of an ellipse hole within a square plate that was displayed on an LCD monitor. Three interactive two-way effects were found and discussed: forward-rotated stimulus angle × subject group, forward-rotated stimulus angle × surface texture, and light type × subject group. We concluded that setting a spotlight at 45° was the best setting without a significant difference in the effects of surface texture and previous digital 3-D experience. These results have implications for the graphics-based design of interfaces, particularly with respect to digital 3-D product presentations, interior design, and the construction of geological models.
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