The goal of the study was to examine the association between visual-attentional span and lexical decision in skilled adult readers. In the span tasks, an array of letters was presented briefly and recognition or production of a single cued letter (partial span) or production of all letters (whole span) was required. Independently of letter…

In this study of the project DyAdd, three aspects of visual attention were investigated in adults (18-55 years) with dyslexia (n = 35) or attention deficit/hyperactivity disorder (ADHD, n = 22), and in healthy controls (n = 35). Temporal characteristics of visual attention were assessed with Attentional Blink (AB), capacity of visual attention…

Binocular yoking of saccades is essential for single vision of words during reading. This study examines the quality of binocular coordination in individuals with dyslexia, independent of the process of reading. Fifteen dyslexia children (11.2 plus or minus 1.4 years) and 15 non-dyslexia individuals (8 children, aged 11.1 plus or minus 1.3 years,…

Participants report briefly-presented words more accurately when two copies are presented, one in the left visual field (LVF) and another in the right visual field (RVF), than when only a single copy is presented. This effect is known as the "redundant bilateral advantage" and has been interpreted as evidence for interhemispheric cooperation. We…

This experiment was designed to test the hypothesis that subjects must know the length of the viewing matter they will be scanning before the target is presented in order to scan efficiently. Adult subjects were required to scan visually for a predetermined item. Targets were one, two, or four letters in length and the pairs of slides shown on…

The functions of spaces between words in adult reading of text were investigated in three experiments. Results were consistent with a two-process theory in which filling parafoveal spaces disrupts guidance of the next eye movement and filling foveal spaces disrupts processing of the fixated word as well. (Author/RD)

The amount of print that 42 college students apprehended in 40 millisecond tachistoscopic flash presentations was monitored for strings of random letters, unrelated words, and words in context (sentences). The results indicated that mean apprehension spans per flash were 3.7 letters for random letters, 9.3 letters (2.0 words) for unrelated words,…

Research reports on the nature of speech, instrumentation for the investigation of speech, and practical applications of speech research are presented in this status report. The 18 reports deal with a variety of topics, including the following: (1) cyclic production of vowels in sequences of monosyllabic stress feet; (2) differences between…