Novelty Categorization Theory

Novelty Categorization Theory (NCT) attempts to predict when people perceive events as novel and how they process novel events across different domains. It is predicted that broad mental categories reduce the perception of an event being novel via inclusion processes, whereas narrow categories increase it via exclusion processes. Furthermore, based on a ‘motive to know’, when preparing for novel events, people broaden both perception and mental categories, because to understand novel information, it is essential to integrate it into pre-existing knowledge structures that are sufficiently broad. Over time, a ‘when-novel-then-process-globally’ routine develops that is automatically elicited when novelty is encountered. Self-protective motives can, however, counteract such processing styles so that threatening novelty leads to local processing. Relations to construal level theory and action identification theory and implications for future research are discussed.     

Mixture Models of Categorization

Many currently popular models of categorization are either strictly parametric (e.g., prototype models, decision bound models) or strictly nonparametric (e.g., exemplar models) (F. G. Ashby & L. A. Alfonso-Reese, 1995, Journal of Mathematical Psychology, 39, 216-233). In this article, a family of semiparametric classifiers is investigated where categories are represented by a finite mixture distribution. The advantage of these mixture models of categorization is that they contain several parametric models and nonparametric models as a special case. Specifically, it is shown that both decision bound models (F. G. Ashby & W. T. Maddox, 1992, Journal of Experimental Psychology: Human Perception and Performance, 16, 598-612; 1993, Journal of Mathematical Psychology, 37, 372-400) and the generalized context model (R. M. Nosofsky, 1986, Journal of Experimental Psychology: General, 115, 39-57) can be interpreted as two extreme cases of a common mixture model. Furthermore, many other (semiparametric) models of categorization can be derived from the same generic mixture framework. In this article, several examples are discussed and a parameter estimation procedure for fitting these models is outlined. To illustrate the approach, several specific models are fitted to a data set collected by S. C. McKinley and R. M. Nosofsky (1995, Journal of Experimental Psychology: Human Perception and Performance, 21, 128-148). The results suggest that semi-parametric models are a promising alternative for future model development.     

Dissimilarity in Creative Categorization

Theories of categorization need to account for ways in which people use their creativity to categorize things, especially in the context of similarity. The current three‐phase study is a preliminary attempt to understand how people group concepts together as well as to explore the role of similarity between concepts in creative categorization. Participants were asked to categorize a list of 100 words and the resulting categories were rated for creativity by another set of participants. In the last phase, similarity between words from all the categories was computed using latent semantic analysis. There was a significant correlation between similarity values and creativity ratings for all the categories. In addition, a new set of participants were asked to rate the similarity among the words in the least and most creative categories and there was a significant difference between the mean ratings of the two types of categories. The results indicate that creative categorization is characterized by grouping of dissimilar words. People use creative imagination to construct novel categories by linking apparently dissimilar words.     

Categorization of briefly presented objects

Two experiments investigated binary categorization of artificial, multidimensional objects that were presented for intervals between 33 and 200 ms. The experiments consisted of two stages. In the first stage, participants learned to categorize nine objects into two categories. In the second stage, the same objects were presented for categorization again, and the presentation duration of the objects was manipulated. The results show systematic effects of exposure duration on category choices. Three formal process models of perceptual categorization were applied to the choice data. The extended generalized context model, which is a dimension-sampling model of perceptual categorization, provided the best account of the data. Received: 31 October 1997 / Accepted: 1 June 1998     

Categorization in the wild

In studying categorization, cognitive science has focused primarily on cultural categorization, ignoring individual and institutional categorization. Because recent technological developments have made individual and institutional classification systems much more available and powerful, our understanding of the cognitive and social mechanisms that produce these systems is increasingly important. Furthermore, key aspects of categorization that have received little previous attention emerge from considering diverse types of categorization together, such as the social factors that create stability in classification systems, and the interoperability that shared conceptual systems establish between agents. Finally, the profound impact of recent technological developments on classification systems indicates that basic categorization mechanisms are highly adaptive, producing new classification systems as the situations in which they operate change.     

Categorization influences illusory conjunctions

Illusory conjunctions (ICs) provide evidence for a binding problem that must be resolved in vision. Objects that are perceptually grouped are more likely to have their features erroneously conjoined. We examined whether semantic grouping, determined by category membership (letter vs. number), also influences illusory conjunction rates. Participants were instructed to detect an “L” or a “7” among briefly presented character strings and to report its color. Despite high shape discrimination accuracy, participants often made color conjunction errors, reporting instead the color of a distractor character, “O”. This distractor could be ambiguously interpreted as a letter or a number. The status of the “O” was determined by other noncolored flanker characters, which were either letters or numbers. When both the target and flankers were of the same category, participants made more ICs than when the target and flankers were of different categories. This finding demonstrates that alphanumeric categorization can precede and subsequently influence binding.     

Categorization in compulsive hoarding

Based on hypothesizing about the role of information processing, and in particular, underinclusive categorization in compulsive hoarding, this study examined categorization processes in people with clinically significant compulsive hoarding problems. Twenty-one participants with primary compulsive hoarding, 21 with OCD without hoarding, and 21 non-psychiatric controls completed three categorization tasks. Hoarding and OCD participants reported significantly more distress prior to each of the three tasks than did controls. On tasks sorting common household items, the groups did not differ on the number of piles created nor on the amount of time taken to sort. However, on a task sorting personally relevant items, hoarding participants took more time, created more piles, and reported more anxiety than non-psychiatric controls. Hoarders also took more time than the OCD group, and tended to create more piles. Hoarding severity was correlated with the number of piles created, but only when the objects were personally relevant. Results support under-inclusive categorizing for people with compulsive hoarding, but the effect was largely confined to objects of personal relevance.     

Processing emotions in sounds: cross-domain aftereffects of vocal utterances and musical sounds

Nonlinguistic signals in the voice and musical instruments play a critical role in communicating emotion. Although previous research suggests a common mechanism for emotion processing in music and speech, the precise relationship between the two domains is unclear due to the paucity of direct evidence. By applying the adaptation paradigm developed by Bestelmeyer, Rouger, DeBruine, and Belin [2010. Auditory adaptation in vocal affect perception. Cognition, 117(2), 217–223. doi:10.1016/j.cognition.2010.08.008], this study shows cross-domain aftereffects from vocal to musical sounds. Participants heard an angry or fearful sound four times, followed by a test sound and judged whether the test sound was angry or fearful. Results show cross-domain aftereffects in one direction – vocal utterances to musical sounds, not vice-versa. This effect occurred primarily for angry vocal sounds. It is argued that there is a unidirectional relationship between vocal and musical sounds where emotion processing of vocal sounds encompasses musical sounds but not vice-versa.     

Social Categorization and Stereotyping: How Social Categorization Biases Person Perception and Face Memory

The current article offers a brief history of research and theory related to social categorization and stereotyping. We begin by outlining research focusing on category selection, category activation, and category application. We then discuss the consequences of social categorization, noting that one of the most important and ubiquitous effects of social categorization is homogenization or assimilation. We then extend this research related to the assimilative consequences of social categorization to the realm of face memory. Specifically, we introduce the Categorization‐Individuation Model (see also Hugenberg et al., forthcoming) as a new model of the Cross‐Race Effect, or the difficulty many perceivers have in recognizing members of other racial groups. The Categorization‐Individuation Model argues that the Cross‐Race Effect is due to the tendency to categorize out‐group members but individuate in‐group members. Finally, we summarize the extant research in support of this new model of person memory and close by discussing the current state of, and potential future directions for, social categorization research.     

Psychoacoustic evaluation of musical sounds

A review is given of several basic aspects of musical sounds, i.e., the perception of duration, the perception of sound impulses as events within temporal patterns, timbre, the equivalence of sensational intervals, roughness, and the pitch qualities of complex sounds. Selected examples illustrate how psychoacoustic results can contribute to the evaluation of musical sounds and to the understanding of the perception of music.     

Categorization and metaphor understanding.

Glucksberg and Keysar (1990) have proposed a class-inclusion model of metaphor comprehension. This theory suggests that metaphors are not understood as implicit similes but are seen as class-inclusion statements in which the topic of a metaphor is assigned to a diagnostic, ad hoc category, whereas the metaphor's vehicle is a prototypical member of that category. The author claims that verbal metaphors are not simply instantiations of temporary, ad hoc categories but reflect preexisting conceptual mappings in long-term memory that are metaphorically structured. Various evidence from cognitive linguistics, philosophy, and psychology are described in support of this claim. Evidence is also presented that supports, contrary to Glucksberg and Keysar's position, the role of tacit conceptual metaphors in the comprehension of verbal metaphors in discourse.     

Social Categorization Moderates Social Projection

When categorized into social groups, people view members of in-groups, but not members of out-groups, as being similar to themselves. In three experiments, social categorization moderated the spread of social projection in both minimal and value-tagged laboratory groups and regardless of whether individual perceivers judged both groups or only one. The categorization effect tracked changes in the perceiver's group status so that most perceivers projected only to present but not past in-groups. The lack of out-group projection supported an anchoring hypothesis, according to which self-referent information is engaged only when it is considered applicable to the judgment at hand. The induction hypothesis and the differentiation hypothesis, which predicted positive and negative out-group projection, respectively, were not supported. Implications for theories of intergroup perception and bias are discussed.     

Categorization processes in mental comparisons

Five experiments explore categorization and category-based congruity effects in mental comparisons. The first 4 experiments concentrate on categorization of infinite-set small items. The experiments vary the additional items presented and whether those items appear once (Experiments 1-2) or repeatedly (Experiments 3-4). Additional items include other small items (Experiment 1), relatively large items (Experiments 2-4), and items involving nonsize dimensions (Experiment 4). The critical small items show a complete congruity effect only in Experiments 1 and 3. Results suggest that categorization of infinite-set items may be based on range information alone (Experiment 1) but that multiple categorizations based on multiple ranges (Experiment 2) may require attentional effort. Results implicate categorization as a central process in mental comparison, despite differences in ease of categorization across paradigm.     

解释学分类及其他

本文之所以要讲解释学分类,因为研究、实施解释学的人往往有三个忽略:(一)不注意海德格尔为什么要中断解释学循环;(二)不反省现代人比古代人更好的理解古代人的启蒙教条;(三)还原解释经验比作为知识学的解释学更能面向事物(文本)本身.     

Tactile discrimination of competing sounds

Discriminably different sounds, concurrently presented from the left and right of the medial plane, were reduced in angular separation until subjects could no longer detect which sound was “left” and which was “right.” The procedure was repeated with hearing masked and judgments made on the basis of the tactile signals at two fingertip vibrators that received their inputs from two miniature microphones bilaterally located on the subject’s head. Auditory and tactile performance were compared under active (head movements permitted) and passive (head held still) conditions. Active and passive performance were not significantly different. Auditory and tactile performance became no better than chance at angular separations of 2.7° and 4.4°, respectively. Touch compared sufficiently well with audition to support arguments for the inclusion of sound localization information in devices which use the skin as a substitute for the ear. nt]mis|This research was conducted at the Smith-Kettlewell Institute of Visual Sciences, San Francisco, California. This institute provided the apparatus for the experiment. B. L. Richardson was on Staff Development Leave from the Applied Psychology Department of the Caulfield Institute of Technology, Melbourne, Australia.