Titchener’s ⊥ with its lines tilted—A partial replication and extension of Cormack and Cormack (1974)
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- 作者：Klaus Landwehr
- 关键词：Visual illusion ; Symmetry ; Neural mechanisms ; Stimulus range effects
- 刊名：Attention, Perception, & Psychophysics
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：79
- 期：1
- 页码：223-229
- 全文大小：
- 刊物主题：Cognitive Psychology;
- 出版者：Springer US
- ISSN：1943-393X
- 卷排序：79
文摘
Following Cormack and Cormack (Perception & Psychophysics, 16, 208–212, 1974), modified versions of Titchener’s (Experimental Psychology, Vol. 1, Pt. 1, 1901) ⊥, in which the ⊥’s lines were tilted (Experiment 1), or tilted and dissected into two separate lines (Experiment 2), were used as stimuli. In Experiment 1, the overestimation of the length of the ⊥’s vertical, undivided line tended to decrease with its tilt relative to the horizontal, divided line. For ⊥s rotated 90° or 270°, the divided line was tilted, and the overestimation of the length of the now horizontal, undivided line vanished except for ⊥s with orthogonal lines. Separation of the ⊥’s lines in Experiment 2 led to an attenuation of the overestimation of the length of the undivided line for the default ⊥, and an underestimation of the length of this line for rotated ⊥s. Results only partly confirm Cormack and Cormack, probably because of the different psychophysical methods used. Findings support the notion of a T-schema as a coherent unit in midlevel visual processing, but also suggest medium- and long-range interactions between orientation-sensitive neural mechanisms.