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Biomedical subjects

S Coren

Publications and source records attributed to S Coren.

At least 37 records · Page 2Linked to original sources
PubMed1987

Left sidedness and sleep difficulty: the alinormal syndrome.

Four indexes of laterality: handedness, footedness, eyedness, and earedness, were assessed in a sample of 1274 subjects. Left- and right-sided groups were compared on two aspects of self-reported sleep difficulty: trouble falling asleep and frequent night wakenings. The incidence of sleep difficulty was found to be elevated in the left-sided groups. The results are discussed in terms of a possible complex of behavioral deviations from the statistical norm, called the alinormal syndrome.

Adult↗
PubMed1987

Reporting the visual acuity of groups: the relation among alternate measures.

There are often large disparities in the way in which visual acuities are reported for groups. A survey of 156 reports published within the last 5 years shows that some researchers report binocular acuity, others best eye, monocular, or mean monocular acuities. Some of these measures may be confounded further with accommodation distance. To ascertain the relation among the various measures of acuity reported commonly, data were obtained from 702 observers. The results indicate that there is a high degree of concordance among the various measures used to report the visual acuity of groups, with many of the correlations in the 0.9 range. It is further shown that a composite measure, based upon mean binocular or best eye acuity, may be a useful means of conveying group differences in visual resolution.

Adolescent↗
PubMed1987

A rapid method to assess crystalline lens pigment density in vivo.

A procedure for rapidly estimating lens pigment density, based upon metameric matches on the D & H Color Rule, is described. A computational nomograph to convert settings to lens densities is provided. This procedure was validated in a sample 126 normal observers, and shown to produce data comparable to more complex laboratory testing procedures. The speed and simplicity of this procedure suggest that it may be useful for monitoring changes in lens pigment density in groups exposed to high levels of environmental, laboratory or industrial ultraviolet light.

Aging↗
PubMed1986

Sighting dominance and egocentric localization.

Theories of the perception of visual direction use, either a hypothetical "projection center" midway between the two eyes, or the line of sight of the sighting dominant eye, as a reference point for egocentric localization. Seventy-five observers made judgments of the visual straight ahead. Their judgments varied as a function of both viewing condition and eye dominance. Judgments were biased toward the side of the viewing eye during monocular exposure, while binocular judgments were intermediate in their placement. Both monocular and binocular judgments were shifted in the direction of the sighting dominant eye, suggesting that the reference point for visual localization lies between the midpoint of the interocular axis and the line of sight of the sighting eye.

Depth Perception↗
PubMed1985

Birth stress and self-reported sleep difficulty.

Difficulty in falling asleep and frequency of night wakenings were assessed in 1,272 college-aged individuals for whom birth histories (based on retrospective maternal reports) were available. A history of birth complications was associated with reports of sleep difficulties as an infant. Birth stressors, such as breech birth, prolonged labor, low birth weight, and multiple births, were predictive of disrupted sleep patterns in the young adult.

Adolescent↗
PubMed1984

Writing hand posture and four indexes of lateral preference.

The relationship between writing hand posture and lateral preference for hand, foot, eye, and ear was examined in a sample of 3709 college undergraduates. A markedly different pattern of lateral preferences was observed in left-handed males and females as a function of hand posture. Left-handed male inverters displayed a tendency toward more leftward lateral preferences in all four indexes; while it was found that hand inversion during writing in left-handed females reflected, if anything, a tendency toward more rightward lateral preferences.

Ear↗