Subjects were required to discriminate previously learned "standard" versions of angular shapes from randomly perturbed "distrator" versions that varied in similarity to the standard. (Editor)

Effects on the event-related potential (ERP) waveform of differences in stimuli (task difficulty) and threshold were studied with 35 undergraduates performing a visual inspection time task and 30 performing a pitch discrimination task. In both tasks, ERP differences related to threshold were temporally localized differences in waveform shape. (SLD)

Studied item calibration stability in relation to response time and the levels of item difficulty between different response groups on a sample of 389 examinees responding to 6 subtest items of the Perceptual Ability Test of the Dental Admission Test. Results show that scores were equally useful for all groups, and different sources of item…

Discusses how human evolution affects the achievement of flow experiences, including the role of complexity, or people's need to take on a greater range of challenges and opportunities to increase their skill level. Describes evolutionary obstacles to complexity, such as genetic instructions to conserve energy, and ways to overcome these…

Reviews assumptions underlying approaches to research into speaking task difficulty and questions the view that test scores always vary with task conditions or discourse variation. Offers a new approach to defining task difficulty in terms of the interaction between pragmatic task features and first language cultural background. Results of a study…

Examined gaze aversion in 5- and 8-year-olds when answering verbal reasoning and arithmetic questions of varying difficulty. Found that older children increase gaze aversion from the face of the adult questioner in response to both verbal and arithmetic difficult questions. Young children responded less consistently to cognitive difficulty.…

Studied five factors that can affect the equating of scores from two tests onto a common score scale through the simulation and equating of 4,860 item data sets. Findings indicate three statistically significant two-way interactions for common item length and test length, item difficulty standard deviation and item distribution type, and item…

The study examined the possible existence of a perceptual hierarchy which is systematically affected by the onset of adventitious visual impairment. Results with 80 persons with partial vision indicated a demarcation of difficulty between the simpler and more complex levels of the hierarchy. (DB)

Findings indicated that: (1) 10- and 13-year-olds had difficulty accepting contrary-to-fact premises as a basis for reasoning; (2) 15- and 18-year-olds found reasoning correctly more difficult with contrary-to-fact premises; and (3) among 5- and 7-year-olds, a fantasy context decreased the extent to which empirical knowledge interfered with…

Four vocabulary lists were used to generate a basic spelling list for students with learning disabilities and other poor spellers. Each word was assigned a grade placement (one through three) based on pattern of occurrence in children's writing and placement on current vocabulary lists and spelling materials. The resulting spelling list of 335…

This study examined the ability of 30 adults with mild or moderate mental retardation to monitor their comprehension while performing a direction-following task. The 60 directions included 6 with trouble sources (ambiguous directions, unintelligible words, and compliance problems). Ability to monitor comprehension varied with type of trouble…

Focuses on the nature of understanding by detailing the process of clinical interviewing. Examples from experiential learning in curriculum and teacher development lead to discussion of curriculum activity that celebrates the complexity of subject matter and the value of engaging learners in pursuing their own learning. (SK)

This study found that 13 autistic subjects performed less well on cognitive than on visual perspective-taking tasks at two levels of difficulty. Autistic subjects performed as well as 13 intellectually handicapped controls and 13 normal controls on visual perspective-taking tasks but more poorly than controls on cognitive perspective-taking tasks.…

A comprehensive review is given of evidence, with a bearing on the recommendation to avoid use of complex multiple choice (CMC) items. Avoiding Type K items (four primary responses and five secondary choices) seems warranted, but evidence against CMC in general is less clear. (SLD)

Discusses dictionaries for learners of English as a foreign language and reveals typical problems of syntactic complexity, idiomaticity, and cultural specificity that inappropriate explanations and examples may pose for learners. (Author/VWL)