Study extends research on the interspersal procedure using standardized mathematics subtests with different task demands. Results showed that the interspersal procedure enhanced academic performance on a Mental Computation subtest, but not a Multiplication subtest. Results indicate that the efficacy of the interspersal procedure is affected…

Issues that must be addressed to develop a cognitive multisource learning theory for educational research are addressed. It is proposed that a constitutive problem for educational learning theory is the explanation of difficult learning. A unit of analysis, called a "contextual module," is applied to this problem. (TJH)

A framework is described for exploiting auxiliary information about test items within item response theory models to enhance parameter estimates. The method also provides diagnostic information about items' operating characteristics. An empirical Bayesian estimation of Rasch item difficulty is used to illustrate the principles involved. (TJH)

The investigation compared the transparency of 11 different types of symbols with 40 nonspeaking mentally retarded subjects (ages 4-20). Analysis indicated a hierarchy of difficulty with actual objects the easiest and Blissymbols and written words the hardest to understand. Results have implications for selecting initial symbol systems for…

A study showed that 5- to 15-year-old children first employed Heider's commission rule, then his intentionality rule, and finally the foreseeability rule at about 11 years of age. Results suggest that both the Heider and Piaget attribution research traditions were correct in part. (RH)

Children between the ages of three and six years were asked to predict their success or failure in two tasks, each of which had five difficulty levels. Tasks were presented either simultaneously or successively. Results indicated that children made realistic assessments of their chances for success at the difficulty levels. Performance factors are…

Responses to a 50-item, 4-choice test were simulated for 1,000 examinees under conventional formula-scoring instructions. Based on 192 simulation runs, formula scores and expected formula scores were determined for each examinee allowing and not allowing for inappropriate omissions. (TJH)

Forty-eight individuals sorted picture cards according to basic (easy) or superordinate (difficult) categories, while being measured on response time to auditory probes (as an index of attention to the primary task). Subjects without mental retardation allocated more attention to difficult tasks. Those with mental retardation gave similar…

Analyzes the distribution of 33 linguistic markers of complexity across 23 spoken and written registers of English. Identifies a five-dimensional model and uses it to describe the complexity characteristics of spoken and written registers. Finds that, whereas written registers exhibit profiles differing widely in extent and kind of complexity,…

A variation of the Mantel Haenszel procedure is proposed that improves detection rates of nonuniform differential item functioning (DIF) without increasing the Type I error rate. The procedure, which is illustrated with simulated examinee responses, involves splitting the sample into low- and high-performing groups. (SLD)

This study examined how five normally developing two-year-old children manage the relationship between phonetic production and production of word combinations in their spontaneous speech. Results revealed tradeoffs between complexity of word combinations and both accuracy of consonant production and phonetic complexity of individual lexical items.…

Fifty-two subjects competed on a task against themselves, a difficult competitor, and an easy competitor. Certainty, ability attribution, and task satisfaction for those with low self-esteem were affected by perceived goal difficulty but not for those with high self-esteem. Low self-esteem groups had lower goals, certainty, and task performance.…

Analyzed the growth of a theoretical-research program in information needs and seeking studies by reconstructing the logical structure of the theories and by comparing conceptual and factual similarities. Found the program to be progressive in terms of empirical support and precision of theories, and elaborative in its growth pattern. Presents…

Examined the assumption that matching difficulty levels of test items with an examinee's ability makes a test more efficient and challenged this assumption through a class of one-parameter item response theory models. Found the validity of the fundamental assumption to be closely related to the van Zwet tail ordering of symmetric distributions (W.…

This study examined the influence of argument-MA-structure complexity on the omission of auxiliary "be" verbs in 30 children with specific language impairment (SLI). Results indicated that the children with SLI and controls matched for mean length of utterance were more likely to omit the auxiliary forms when attempting sentences with greater…