Odic D, Pratt J, 2010, "Differential-activation theory can account for the Ternus display: Rejoinder to Petersik" Perception 39(5) 711 – 717
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Differential-activation theory can account for the Ternus display: Rejoinder to Petersik
Darko Odic, Jay Pratt
Received 30 November 2009, in revised form 22 February 2010
Abstract. The Ternus display is a bistable apparent-motion display that has captivated researchers for decades. Recently, Odic and Pratt (2008, Perception 37 1790 – 1804) provided evidence against the well-known two-process theory of Braddick and Adlard [1978, Visual Psychophysics and Physiology (New York: Academic Press) pp 417 – 426] and provided an explanatory framework using the differential-activation theory of Gilroy et al (2001, Perception & Psychophysics 63 847 – 861). A comment by Petersik (this issue) challenges the methodology and theoretical implications of Odic and Pratt, and claims that the two-process distinction still has a role to play in the Ternus display. In this rejoinder, we examine the main points made by Petersik and expand on the differential-activation theory and its applicability to the Ternus display.
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