Howe Piers D L, Sagreiya Hersh, Curtis Dwight L, Zheng Chengjie, Livingstone Margaret S
Department of Neurobiology, Harvard Medical School, Boston MA 02115, USA.
Psychol Rev. 2007 Oct;114(4):1105-9; discussion 1111-4. doi: 10.1037/0033-295X.114.4.1105.
Recently, a double-anchoring theory (DAT) of lightness perception was proposed (P. Bressan, 2006), which offers explanations for all the data explained by the original anchoring theory (A. Gilchrist et al., 1999), as well as a number of additional lightness phenomena. Consequently, DAT can account for an unprecedented range of empirical results, potentially explaining everything from the basic simultaneous contrast display to subtle variations of the Gelb effect. In this comment, the authors raised 4 concerns that demonstrate serious theoretical and empirical difficulties for DAT.