Perceptual Unitization in Part-Whole Judgments
نویسندگان
چکیده
Categorization relies upon the vocabulary of features that comprise the target objects. Previous theoretical work (Schyns, Goldstone, & Thibaut, 1998) has argued this vocabulary may change through learning and experience. Goldstone (2000) demonstrated this perceptual learning during a categorization task when new features are added that create a single feature unit from multiple existing units. We present two experiments that expand on that work using whole-part judgments (Palmer, 1978) to elicit the feature representation learned through categorization. The implications for different classes of computational models of categorization are discussed.
منابع مشابه
Emergence of features in visual stimuli
It has been suggested that new perceptual features can be “created” when they are necessary for a particular task. For instance, by “unitization” (Goldstone, 2000), components which were previously processed separately become represented as a wholistic unit. Certain associative theories (McLaren, Kaye and Mackintosh, 1989) explain unitization as the establishment of connections between reliably...
متن کاملAn LDA Approach to the Neural Correlates of Configural Learning
The purpose of our current study is to employ linear discriminant analysis (LDA; Philiastides & Sajda, 2006) to characterize the changes in ERPs over the entire course of a perceptual learning task. Configural learning is the perceptual learning process by which participants develop configural processing strategies or representations characterized by extremely efficient parallel information pro...
متن کاملPerceptual learning.
Perceptual learning involves relatively long-lasting changes to an organism's perceptual system that improve its ability to respond to its environment. Four mechanisms of perceptual learning are discussed: attention weighting, imprinting, differentiation, and unitization. By attention weighting, perception becomes adapted to tasks and environments by increasing the attention paid to important d...
متن کاملUnitization, similarity, and overt attention in categorization and exposure.
Unitization, the creation of new stimulus features by the fusion of preexisting features, is one of the hypothesized processes of perceptual learning (Goldstone Annual Review of Psychology, 49:585-612, 1998). Some argue that unitization occurs to the extent that it is required for successful task performance (e.g., Shiffrin & Lightfoot, 1997), while others argue that unitization is largely inde...
متن کاملObject unitization and associative memory formation are supported by distinct brain regions.
While it has been established that the medial temporal lobe (MTL) is critical for successful memory formation, the precise contribution of one of the key MTL subregions, the perirhinal cortex (PrC), has been the subject of intense focus and debate. Although this region has been implicated in nonassociative item encoding, recent neuroimaging data have revealed that it also contributes to the bin...
متن کامل