Differing views on views: comments on Biederman and Bar (1999).

<p>In a recent article, <a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB7">Biederman and Bar (1999)</a> present several results to support “a class of theories [that] assumes that non-accidental properties (NAPS) might be exploited so that even novel objects can be recognized under depth rotation” — specifically, theories based on ‘geons’ (<a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB1">Biederman, 1987</a> and <a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB17">Hummel & Biederman, 1992</a>). Biederman and Bar likewise present results that they believe to be inconsistent with a “class of theories … based on generalization from templates specified by metric properties” — specifically, ‘view-based’ or ‘image-based’ theories (<a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB8">Bricolo, Poggio & Logothetis, 1997</a>,<a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB24">Poggio & Edelman, 1990</a>, <a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB30">Tarr & Bülthoff, 1995</a> and <a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB31">Tarr & Bülthoff, 1998</a>). Because our disagreements with Biederman's theoretical approach have been detailed in many other forums (<a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB15">Hayward & Tarr, 1997</a>, <a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB30">Tarr & Bülthoff, 1995</a> and <a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#BIB31">Tarr & Bülthoff, 1998</a>) we do not feel it is necessary to respond in kind. We do feel, however, that it is necessary to address a series of straightforwardly incorrect claims made by Biederman and Bar regarding our published results. Below we enumerate these claims, and our replies to each<a href="http://www.sciencedirect.com/science/article/pii/S0042698900001796#FN2">²</a>:</p>