This study explores the effects of the "presence of external representations of a mathematical object" (ERs) on problem solving performance associated with short double-choice problems. The problems were borrowed from secondary school algebra and geometry, and the ERs were either formulas, graphs of functions, or drawings of geometric…

The results of this study support the assumption that long-term memory is not modified when a person performs a task utilizing an automatic process. Twelve university students performed an incidental learning task which consisted of scanning lists of words for either their own name, first names other than their own, words representing a unit of…

Two experiments found that integration of facts alleviates interference only when a person can perform a memory task by making a consistency judgment and can avoid the need to retrieve a specific fact. People judge themes rather than facts: the more themes associated with a concept, the greater the interference. (Author/RD)

This examination of retrieval interference in memory theories argues that relevant world knowledge can reduce interference by integrating factors learned about a concept. Three recognition experiments were conducted and two hypotheses were considered to account for the results: human associative memory and script analysis. (Author/RD)

A target paragraph was embedded in one passage where the target was of major importance, and one where it was of minor importance. Free recall, reading time, and usage of cognitive capacity were measured. There was greater recall when the target was important. The selective-attention hypothesis was not supported. (Author/GDC)

The effect of the sensory discriminability of targets from nontargets on depth of nontarget processing was examined. Depth of nontarget processing was measured by semantic overlap between targets and nontargets, reaction time, and nontarget recall. Depth of processing decreased as sensory discriminability increased, supporting multiple-loci…

Ratcliff's theory of memory retrieval which posits parallel processing and Sternberg's serial processing explanation of memory scanning are reviewed and contrasted. Discrepancy between the two theories may arise because they focus on different aspects of the data. If scanning without comparisons takes place, the two views may be reconciled.…

Fifty-five recent studies of individual differences (IDs) in elementary cognitive tasks (ECTs) are reviewed. Twenty-five data sets are examined, analyzed, or reanalyzed by factor analysis. The following promising dimensions are identified: basic perceptual processes, reaction and movement times, mental comparison and recognition tasks, retrieval…

This study demonstrated an aptitude-strategy interaction in linear syllogistic reasoning; specifically, that the efficiency of each of four alternative strategies for solving linear syllogisms would depend on subjects' verbal and spatial abilities. The four strategies, as well as research methods in aptitude-treatment interaction, are discussed.…

This study deals with word retrieval problems of aphasic patients. This word-finding difficulty is a common characteristic of aphasics and many methods have been used by aphasia clinicians to attempt to remediate word retrieval skills. Cueing, one of the methods used, presumably facilitates word-finding by supplying additional information to the…