The purpose of this article is to point out some of the problems that arise in the use of calculators to illustrate derivatives, due to rounding or truncation, by the calculator. Several illustrations of numerical differentiation techniques are also given. (Author/MP)

Examines fourth grade children's memory for information contained in target sentences presented 24 hours earlier. Examines the occurrence of interference by presenting multiple choice response options consisting of a correct word, a new word, and a word which occurred in a previous sentence. Attempts to extend the principles of frequency theory.…

As children progress, they want their responses to make sense and they learn to use strategies based on meaning and language. (JM)

The pronunciation of stop consonants in consonant-vowel-consonant words by 45 preschool children (15 with speech disorders) was evaluated. In the speech-disordered group, errors in initial position differed from those in final position. Voicing errors occurred most frequently in initial position, and glottal stop realizations in final position.…

Catalogs a variety of common grammatical errors that have entered the English language and become entrenched during this past generation, primarily through the fault of the mass media. (NKA)

The study investigated types of errors made by learning disabled children by analyzing written responses to multiplication and division problems. Error classifications are discussed, and possible causes are suggested. The importance of thorough investigation of errors by teachers is stressed. (Author/DB)

The ability of 22 phonologically disordered and normally speaking children's ability to process (phonologically, syntactically, and semantically) spoken language was evaluated. No differences between groups was found in number of errors, pattern of errors, or reaction times when monitoring sentences for target words, irrespective of sentence type.…

Analyzes generalization failures. A format is provided for categorizing errors and linking them to stimulus characteristics present during training. Stimulus control serves as the pivotal concept that directs this error analysis, and provides the bridge between infrahuman research on generalization and the broader applied issue of obtaining…

A probablistic approach to classification and diagnosis of erroneous rules of operations that result from misconceptions ("bugs") in a procedural domain of arithmetic is introcuced. Variability of response errors is explicitly treated through item response theory. As a concrete example, a signed-number subtraction dataset is analyzed.…

In a modified replication study, a general question intended to capture spontaneous detection of inconsistent information found neither good nor poor comprehenders successful. In response to a specific question, however, good comprehenders evinced far superior error detection than poor comprehenders. Reasons are speculated upon. (Author/MT)

The need for developing a technology of teaching that equals current sophistication of microcomputer technology is addressed. The importance of principles of learning and behavior analysis is emphasized. Potential roles of stimulus control and precise error analysis in educational program development and in prescription of specific learning…

Findings suggest that semantic knowledge for concrete objects is represented and organized in similar ways in autistic, retarded, and normal children. Previous findings on cognitive deficits in autistic children are more likely related to their inability to use cognitive representations in an appropriate and flexible manner. (Author/RH)

First examines German modal verbs with respect to multiple meanings and synonymy, finding that "implications," especially presuppositions, account for important differences in their uses. The same approach is used on French modals. Common features and differences are studied, and typical errors are predicted and classified. (Text is in…

Special issue devoted to neurolinguistics and neuropsychology. (VM)

The author argues that a knowledge of mathematical structure is only helpful to the high ability student. (MM)