An exploratory study probed the extent to which children rely on category membership to guide their inferences. A total of 60 children, 4 years of age, were shown 20 sets of pictures of various animals, plants, and minerals. Each set consisted of representations of three objects having two salient features: perceptual similarity/dissimilarity and…

G. Wolford's perturbation model of letter identification is designed to account for identification errors of briefly presented characters. Its chief assumptions are that features are extracted in parallel, that some of these features become perturbed or mislocalized, and that mislocalizations are more likely to occur in the direction of the fovea…

Recently, knowledge of the mechanisms of visual-spatial attention has improved due to studies employing single cell recording with alert monkeys and studies using performance analysis of neurological patients. These studies suggest that a complex neural network including parts of the posterior parietal lobe and midbrain are involved in covert…

Behaviorism cannot adequately explain language processing. A synthesis of the psycholinguistic and information processing approaches of cognitive psychology, however, can provide the basis for a speculative analysis of reading, if this synthesis is tempered by a perceptual learning theory of uncertainty reduction. Theorists of information…

Evaluation models are being developed for assessing artificial intelligence (AI) systems in terms of similar performance by groups of people. Natural language understanding and vision systems are the areas of concentration. In simplest terms, the goal is to norm a given natural language system's performance on a sample of people. The specific…

Thirty-six college students read a portion of a contemporary novel presented on a cathode ray tube while their eye movements were being monitored and recorded in an effort to determine how soon after the onset of a fixation during reading the mind begins to deal with characteristics of the language being perceived. The passage contained a total of…

The model of sentence perception proposed by Fodor, Bever and Garrett (1974) emphasizes the importance of grammatical cues signalling clause boundaries, and suggests that segmentation of a sentence into clauses precedes computation of the internal structure of those clauses. However, this model has nothing to say about the many sentences in which…

A previous study by Gibson et al. (1972) that investigated the effect of orthographic structure on letter search was replicated and extended in order to identify factors that might explain the apparent discrepancy between their results and those of comparable studies. Experiment one tested whether the discrepancy might be explained by difference…

A study investigated children's difficulty in learning color words and attempted to determine whether the difficulty was perceptual, conceptual, or linguistic. The subjects were 24 two-year-olds, half with knowledge of color words and half without, and a similar control group. The experimental subjects were given conceptual and comprehension tasks…

The reversal errors in the printing of 51 first grade students were examined. These children were asked to print a series of reversible target figures (letters and numbers, such as 2-s, p-q, p-9, and b-d) that were presented alone and with their mirror-image counterparts. To control for the possibility that the mere presence of another figure…

A study investigated whether a visual selective attention deficit with its presumed basis in slow visual processing referred to the same phonological recoding deficit, or whether they were two independent sources of reading disability. Subjects were children aged 7 to 15 referred to a university clinic (the Waterloo Child Assessment…