The primary purpose of this article is to describe, justify, and elaborate a preliminary quantitative model for a subset of the letter-identification process. (Author)

The primary concern in this study has been to interpret the ways in which perception of a letter depends on properties of other letters present in the same display. (Author)

An encoding algorithm uses empirically determined confusion matrices to activate units in an alphabetum and a lexicon to predict performance of word, orthographically regular nonword, or irregular nonword recognition. Performance is enhanced when decisions are based on lexical information which constrains test letter identity. Word prediction…

Discusses language comprehension and describes a technology for computer-aided text analysis called READWARE and software from the READWARE family called the Research Assistant that measures the relatedness of words or phrases by examining their letters. The theory of Letter Semantics is explained, and paradigms for text processing in information…

Using recognition rather than recall test procedures gives results which are inconsistent with the main features of the visual trace model for short-term memory. (Author)

Two strings of letters were presented. Subjects were instructed to indicate whether the second string contained the same elements as the first, regardless of position. Reaction time increased with the number of positions that the letters were displaced. Results indicate that order may be an important factor in retrieval from memory. (Author/BW)

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…

This research assesses whether the presence of noise elements in a visual display affects the detection of target letters at the perceptual or feature extraction level of information processing and whether (a) input or processing channels operate in an independent or interactive fashion and (b) how the spatial relation between signal and noise…

A model of context effects in perception is applied to perception of letters. Perception results from excitatory and inhibitory interactions of detectors for visual features, letters, and words. The model produces facilitation for letters in pronounceable pseudowords as well as words and accounts for rule-governed performance without any rules.…

Effects of target-noise similarity on the ability to discriminate between two target letters were investigated. Performance was low when the noise letter shared the same name as the target. Thus, interletter interference effects cannot be explained in terms of inhibition between visual features. A "cognitive masking" hypothesis is proposed.…

Article considers the motivation for perceptual recognition and cognition in evaluating the reasons for reading difficulties of children. (RK)

The duration and timing of the context is which letters occur is shown to influence the perceptibility of the target in experiments demonstrating that early on enhanced word presentations and pronounceable-pseudoword contexts increase letter perceptibility. The perceptibility of letters in strings sharing several or few letters with words is…

Three experiments report additional evidence that it is a mistake to account for all interletter effects solely in terms of sensory variables. These experiments attest to the importance of structural variables such as retina location, array size, and ordinal position. (Author/PN)

Examined effects of orthographic context on the letter recognition skills of dyslexic children, comparing their performance to that of adults and of chronological and reading age-matched groups. Results showed that the two matched groups showed strong word superiority effect (WSE) for words and pseudowords over nonwords. Dyslexic readers did not…