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Biomedical subjects

S Dickman

Publications and source records attributed to S Dickman.

At least 109 records · Page 6Linked to original sources
PubMed1985

Impulsivity and perception: individual differences in the processing of the local and global dimensions of stimuli.

There appears to be an association between a "global" mode of perceptual processing and a cluster of personality traits, one of which is impulsivity. The goal of the present study was to clarify this relationship. Subjects differing in impulsivity (as measured by a self-report inventory) performed speeded cardsorting tasks. They sorted stimuli consisting of large letters made up of smaller letters. Highly impulsive subjects had no more difficulty than other subjects in ignoring the large, "global," letters when they tried to attend to the smaller, "local," letters of which they were composed, nor were they more vulnerable than other subjects to Stroop-like response interference produced by the global letters. High impulsives did have particular difficulty when the task required that they integrate the information provided by the local and global letters. This finding can be explained in terms of individual differences in the value placed on speed relative to accuracy in information processing.

Attention↗
PubMed1984

Glutathione peroxidase, glutathione reductase and superoxide dismutase in the aging lens.

Glutathione reductase (GR) and glutathione peroxidase (GPx) show in bovine lenses a decrease in specific activity; furthermore, the heat lability of both enzymes increases with age monitoring structural changes of the molecules. GR activity was correlated with type of cataract in human lenses. Its decrease is significantly connected with cortical opacities. Superoxide dismutase activity declines in aging and cataractous lenses. These results support the assumption that in old lens tissue the capacity of the antioxidative scavanger system is diminished.

Adult↗