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Animal Behavior and Cognition





Using a psychophysical approach coupled with eye-tracking measures, we varied length and width of shape stimuli to determine the objective parameters that corresponded to subjective determination of square/rectangle judgments. Participants viewed a two-dimensional shape stimulus and made a two-alternative forced-choice whether it was a square or rectangle. Participants’ gaze was tracked throughout the task to explore directed visual attention to the vertical and horizontal axes of space. Behavioral results provide threshold values for two-dimensional square/rectangle perception, and eye-tracking data indicated that participants directed attention to the major and minor principal axes. Results are consistent with the use of the major and minor principal axis of space for shape perception and may have theoretical and empirical implications for orientation via geometric cues.


©2017 Sturz, B; Boyer, T.; Magnotti, J.; and Bodily, K. All Open Access articles are distributed under the Creative Commons Attribution 3.0 License, which permits individuals to copy, reuse, reprint, modify, distribute, transmit, and adapt their work in any medium, so long as the original work is properly cited.