Intelligence and short-term memory: A clandestine relationship

Five possible mechanisms are considered as being responsible for the systematic variation of serial STM with IQ, namely rehearsal maintenance, chunking, access, encoding of item and/or order information, and trace persistence. A STM/IQ correlational study is reported. It was concluded from analysis of a correlation matrix, and from earlier reported data, that the encoding of items-in-order into an already loaded store appears to be the critical mechanism in determining IQ-related individual differences in STM performance, at least in children. The implications of individual difference data for models of STM are also discussed.     

The Tacit–Explicit Connection: Polanyian Integrative Philosophy and a Neo-Polanyian Medical Epistemology

The purpose of this paper is to introduce an approach to clinical practice aiming to resolve the dilemma of choosing between a mechanistic and a phenomenological model. The approach is an extension of Polanyi's epistemology. Michael Polanyi (1891–1976), devised an epistemology of science which overcomes the problem of detachment, inherent in the L42306017G7N37/xxlarge8220.gif" alt="ldquo" align="MIDDLE" BORDER="0">mechanisticL42306017G7N37/xxlarge8221.gif" alt="rdquo" align="MIDDLE" BORDER="0"> approach, and resolves the problem of subjectivity troubling phenomenologists. His epistemology is known as Personal Knowledge. An extension of this epistemology, a Neo-Polanyian proposal, is offered as a more successful model for clinical practice than previous suggestions addressing the dilemma.     

Toward quality criteria for collective judgments

While most organizational and social decision making is done in a group or collective mode, there are few guides or evaluative criteria for judging when a high-quality outcome has been reached. Most past studies of group decision making have been conducted in laboratories using student subjects and factual problems with correct answers as means for judging outcome quality. Such proxies are rough approximations at best of real-world conditions where value differences can be intense and problems have no correct or best answer. Drawing upon the existing literature, evaluative criteria are proposed including process, content, and outcome concerns. An instrument based upon these criteria is then applied retrospectively to six cases of ad hoc collective decision making. Using dimensional analyses, a set of more detailed evaluative factors is derived from actual participant responses. The results provide some insights into the nature of high-quality collective judgments as well as the most effective procedures for their achievement.     

Overshadowing and blocking of the orientation-contingent color aftereffect: Evidence for a conditioning mechanism

Orientation-contingent color aftereffects have been interpreted by nonassociative mechanisms (adaptation of neural units that are both color and orientation specific) and by associative mechanisms (conditioning resulting from the pairing of pattern and hue). To evaluate associative accounts, contingent aftereffects were induced by exposing subjects to compound chromatic grid patterns consisting of two component gratings: one was horizontal or vertical, and the other a left- or right-learning diagonal. The ability of a component grating to elicit a color aftereffect depended on the relative salience and the aftereffect training history of the grating components. That is, orientation-contingent color aftereffects, like other conditional responses, display overshadowing and blocking. The results suggest that conditioning contributes to these aftereffects.     

Is there a disposition to avoid the fundamental attribution error?

Two studies investigated the possibility that personality variables might relate to the magnitude of the cognitive attributional error. In the first, participants received either a pronuclear or anti-nuclear weapons essay, and were asked to rate the writer's personal beliefs (attitude attribution). As expected, certain Myers-Briggs Type Indicator indices of cognitive processing preferences did not predict variations in attribution in the Choice condition, but did so in the Constraint condition. In the Constraint condition, subjects expressing the Intuitive Thinking preference showed no significant attributional error (i.e., no tendency to rate in line with essay content). Other subjects in this condition showed the usual attributional error. These findings were generally replicated in the second study, which used the Constraint condition only. The Self-Monitoring scale was added as a predictor; it did not relate to the attributional error. It was suggested that measures of cognitive processing style may be more relevant to attribution than the various measures of sensitivity to environmental variation.     

Children's perception of melodies: the role of contour, frequency, and rate of presentation

Children 4 to 6 years of age were exposed to repetitions of a six-tone melody, then tested for their detection of transformations that either preserved or changed the contour of the standard melody. Discrimination performance was examined as a function of contour condition, magnitude of contour change, rate of presentation, and the presence of novel frequencies. Performance was superior for transformations that changed contour compared to those that did not, for greater changes in contour, and for faster presentation rates. Melodies transformed by a reordering of component tones were no less discriminable than those transformed by the addition of novel frequencies.     

Mirror reading in right and left handers: Are sinistrals really superior?

While left handers, where they do in fact appear to differ from right handers in cognitive function, have generally been found to be slightly inferior on verbal tasks, there are some reports of a sinistral superiority for nonverbal or spatial abilities. Tankle and Heilman (Brain and Language, 1982, 17, 124-132) report a sinistral superiority in (obligatory) reading of left-right mirror-reversed text. However, in an investigation which included various other forms of geometrical transformation of the written word, we find that strong familial sinistrals are either not different from or even slightly inferior to dextrals in reading most transformations, including left-right mirror reversals.