In this reply to W. T. Maddox and E G. Ashby's (1998) commentary, the author argues that (a) Maddox and Ashby's current stance represents a marked departure from their previously published claims about the unimportance of selective attention in categorization, (b) they are inconsistent with their own work when they criticize S. C. McKinley and R. M. Nosofsky's (1996) tests of the linear-boundar...

(Ashby & Maddox, 1998). Whenever we define an object as a “kind” of thing, we are categorizing. In keeping with its important role in perception and cognition, several powerful theories have been proposed and model-based instantiations developed to predict categorization performance. These include, among others, prototype (Anderson, 1991; Homa, Dunbar, & Nohre, 1991; Reed, 1972), exemplar (see ...

on an exceedingly dull afternoon.’ [3]. He had abandoned Introduction wet collodion plates because he could not stand the smell of the ether necessary in their preparation. Maddox Physicians have been quick to appreciate the pleasures and applications of photography. In 1863 Oliver Wendell lamented that the pressures of clinical practice prevented further photographic experimentation. Although ...

in iran, onion plants are currently broadcast over the majority of onion fields and weeding and harvesting are done manually by seasonal workers. at harvest time, 40 worker-days are required to onion dig just one hectare. this cost could be saved if the operation could be carried out by machine. rear-mounted diggers can only be implemented if 40 cm spacing between rows is allowed for each tract...

Leaders create meaning out of events and relationships that devastate nonleaders. Even when battered by experience, leaders do not see themselves as helpless or find themselves paralyzed. They look at the same events that unstring those less capable and fortunate and see something useful, and often a plan of action as well. A powerful example is that of Vernon E. Jordan, civil rights pioneer an...