Categorical effects in visual search for colour

Redundant spoken labels facilitate perception of multiple items

“…Search among targets and distractors that are within these categories is slower than that between them, even though the differences in stimulus parameters remain constant. Daoutis, Pilling, and Davies (2006) obtained similar results using color categories with perceptual distances controlled. The guided search model (Wolfe, 1994) elegantly accounts for these findings through top-down effects of channels that have peak activations at the centers of these categories (e.g., the vertical channel responds maximally to vertical lines).…”

Continuous dynamics of color categorization

“…At the same time, it would allow for categories to emerge over time (Fonteneau & Davidoff, 2007) and even affect other processes (Daoutis, Pilling, & Davies, 2006;Hampton et al, 2005;Kulikowski & Vaitkevicius, 1997). Thus, a dynamic competitive approach may offer a better way to characterize the complex relationship between hue and category than do models emphasizing discrete categories and categorical perception.…”

What can we learn from toddlers about categorical perception of color? Comments on Goldstein, Davidoff, and Roberson

“…Third, when we decided to use this task, testing for CP with memory tasks was standard (e.g., . However, since that time, adult studies have used tasks that remove the memory component such as visual search (e.g., Daoutis, Pilling, & Davies, 2006;Gilbert, Regier, Kay, & Ivry, 2006;Roberson, Pak, & Hanley, 2008) and target detection tasks (Drivonikou et al, 2007;Franklin et al, 2008;Franklin, Pilling, & Davies, 2005b). When these tasks are used, it is clearer that any categorical effects are actually related to perceptual processes rather than to memory effects such as the shift toward prototype (Huttenlocher, Hedges, & Vevea, 2000).…”