Secondary task performance was used to evaluate the attentional demands of encoding the first letter in a sequential letter-match task. Unlike earlier studies, comparing secondary task performance between two primary task conditions indicated that letter encoding involves attention. Performance during the intertrial interval varied with subjects'…

Using a combination of letter-detection and proofreading techniques, subjects searching for target letters in printed text made more errors on correctly spelled words than misspelled words. This word inferiority effect contrasts with the superior perception of letters in words over nonwords commonly found in tachistoscopic studies. (Author/CM)

In three experiments, this study addressed two basic questions about the detection of multiletter patterns: (1) How is the detection of a multiletter pattern related to the detection of its individual components? (2) How is the detection of a sequence of letters influenced by the observer's familiarity with that sequence? (Author/BW)

In three experiments, subjects read passages and circled misspelling in them. Results support the unitization hypothesis that common words are normally read in units larger than letters but are read in letter units when misspelled. (Author/CP)

The suggestion of Krueger (1973) and others that wholistic processes underlie certain perceptual judgments is taken up in this paper. (Editor)

Attempts to settle the question of whether reading units are ever larger than letters and considers the variables expected to influence the size of the reading unit. (Author/RK)

Although a feature detection theory of pattern recognition is consistent with many recent physiological findings, the specific rules governing the perception of the distinctive features of letters have not yet been determined. This article presents two new experimental procedures for determining these rules. (Editor)

This paper reports some experimental evidence on the viability of the preliminary letter recognition hypothesis. (Author)

A familiarity effect in these experiments is defined as a subject's ability to respond more rapidly to a familiar stimulus than to an unfamiliar stimulus. Evidence indicates that familiarity does not affect an initial encoding process, but it can affect a comparison process. (Editor/RK)

In two experiments, a probe technique required subjects to respond when the digit 7 appeared in one of five-letter positions in words or nonwords, inserted at the onset and 500 msec after letter and word processing. The focus of attention given to a letter has a smaller spatial extent. (Author/CM)

In four experiments, college students were presented with lists of either Armenian or English letters on a tachistoscope. The data indicate that extensive practice may be a necessary condition for capacity-free processing but may not be a necessary condition for involuntary processing. (Author/RD)

Reaction time and accuracy do not always reflect the same perceptual processes; therefore, the convergence of reaction time with accuracy within the context of a specific information processing model should be demonstrated empirically rather than assumed a priori. (Author/PN)

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)

Investigates the effects of linguistic context, more particularly, semantic context in the form of an incomplete sentence, on the ability of observers to classify letter strings as words or nonwords. (Author/RK)

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.…