![]() The children moved clockwise round the room, then anticlockwise. Bulletin of the Psychonomic Society, 15, 153–156.In the direction of the movement of the hands of a clock. Naming and categorization of tilted alphanumeric characters do not require mental rotation. Upward direction, mental rotation, and discrimination of left and right turns in maps. Unpublished manuscript, Yale University, New Haven, CT The perception of disoriented complex objects. Imagined spatial transformations of one’s hands and feet. Journal of Experimental Psychology General, 116, 172–191. Imagined spatial transformation of one’s body. Reading, writing, and speech problems in children. Sur la genèse des structures asymétriques chez I’embryon des oiseaux. The time taken to name disoriented natural objects Memory & Cognition, 13, 289–303. Long (Eds.), Attention and performance IX (pp. Decisions about identity and orientation of rotated letters and digits. Canadian Journal of Psychology, 23, 186–188.Ĭorballis, M. Latency to categorize dtsonented alphanumeric characters as letters or digits. Human Perception & Performance, 8, 215–224.Ĭorballis, M. Interaction between perceived and imagined rotation. Journal of Child Psychology & Psychiatry, 10, 318–327.Ĭorballis, M. ![]() The naming of disoriented letters by normal and reading-disabled children. Psychological Review, 95, 115–123Ĭorballis, M. Polegal (Ed.), Spanal abilities: Developmental and physiological foundations (pp 173–198). Human Perception & Performance, 1, 48–56.Ĭooper, M. Mental transformation in the identification of left and right hands. Chase (Ed.), Visual information processing (pp. Chronometric studies of the rotation of mental images In W G. (1976) Mental transformations and visual comparison processes: Effects of complexity and similanty Journal of Experimental Psychology: Human Perception& Performance, 2, 503–514.Ĭooper, L. Behavior Research Methods & Instrumentation, 12, 614–626.Ĭooper, L. Glasgow, Scotland: Fontana/Collins.Ĭavanagh, J. In Experiment 3, only a few subjects proved able to use an orientation-free, clockwise versus counterclockwise rubric in order to discriminate normal from backward letters.īateson, G. It was less so in Experiment 2, where direction of motion was indicated in a static display. This was most evident in Experiment 1, where the stimuli represented 1-h jumps of a hand on a clock face. Mental rotation was invoked less frequently in the case of the experimental tasks, suggesting at least limited access to an orientation-free code representing the difference between clockwise and counterclockwise. Analysis of reaction times suggested that, in the control tasks, the subjects generally rotated the stimuli mentally to the canonical orientation before making their decision. In each experiment, there was also a control condition in which the subjects were required to make mirror image judgments relative to some canonical orientation. ![]() In three experiments, subjects were timed as they judged whether stimuli, presented in different angular orientations, represented clockwise or counterclockwise directions.
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