Investigates the related characteristics of asynchronous learning material used for distance education and Web-based instruction and proposes a material characteristics model. Discusses the relationship among the degree of difficulty of the material, student characteristics, and student abilities; social factors; suitability of teaching materials…

The comparative translucency within and across 5 aided augmentative and alternative symbol systems for symbols representing 3 parts of speech (nouns, verbs, and modifiers) was investigated with 50 college undergraduates. Results indicated that translucency varies among systems or sets and among parts of speech. (Author/DB)

Under certain conditions it may be possible to determine the difficulty of previously untested test items. Although no recipe can be provided, reflections on this topic are presented, drawing on concepts of item banking. A functional constructive method is suggested as having the most potential. (SLD)

Two characteristics that determine problem difficulty--the nature of the move search space and its interaction with other aspects of the task--were investigated in experiments in which 26, 69, 42, and 42 community college students attempted to solve the Chinese Ring Puzzle. The origins and implications of difficulty are discussed. (SLD)

Forty elementary-school learning-disabled children completed a design assembly task and a vocabulary task. Results indicated a significant performance (success and failure)-by-maternal involvement (presence and absence) interaction for children's attributional ratings of effort, task difficulty, and luck, and for mothers' attributional ratings of…

The effects of semantic and syntactic complexity on the reading comprehension of content-area prose were investigated among 92 adolescents with learning disabilities. Subjects who read passages that had been modified syntactically or both syntactically and semantically exhibited improved comprehension. Semantic modifications alone did not affect…

Old and young adults participated in two experiments involving a standardized, hierarchically organized event. In interviews that assessed memory of the event, older subjects reported fewer event actions than did the young. Memory of old and young was influenced similarly by the hierarchical structure of the event. (RH)

This study of 114 children between seven and nine years used a procedure for directly observing child-produced and experimenter-produced strategies to examine the transitional period of strategy development. Findings revealed gradual changes in children's ability to produce, and to benefit from, a strategy of selective attention. (RH)

Violations of item unidimensionality on language tests produced distorted estimates of person ability, and violations of person unidimensionality produced distorted estimates of item difficulty. The Bejar Method was sensitive to such distortions. (Author)

The comparability of scores on test forms that are constructed through examinee item choice is examined in an item response theory framework. The approach is illustrated with data from the College Board's Advanced Placement Test in Chemistry taken by over 18,000 examinees. (SLD)

Discusses subject searching and describes a study that evaluated the match between the named terms and the expected subject headings by examining the subject search terms generated by students. Highlights include nonsemantic properties in evaluating search terms, including concreteness, complexity, and syndeticity; and metacognitive naming skills…

Sixty elementary students with learning disabilities were interviewed about parallel domains of uncontested and contested knowledge on the topic of space, including questions of morality and questions of empirical law. Students clearly distinguished between uncontested and contested knowledge, suggesting that they are capable of working with…

Twenty-two subjects with autism were tested on three perspective-taking tasks. Subjects were successful on two tasks that required them to make relatively direct connections between eating and hunger or visual access and knowledge. They failed a task which used stimuli of a more transient nature and less predictable reactions of the protagonists.…

Reliabilities and information functions for percentile ranks and number-right scores were compared using item response theory, modeling standardized achievement tests. Results demonstrate that situations exist in which the percentage of items known by examinees can be accurately estimated, but the percentage of persons falling below a given score…

A study was conducted with 782 elementary school students to determine whether the Homan-Hewitt Readability Formula could identify the readability of a single-sentence test item. Results indicate that a relationship exists between students' reading grade levels and responses to test items written at higher readability levels. (SLD)