PubMed Health⌕ Search

Biomedical subjects

D K Charman

Publications and source records attributed to D K Charman.

6 recordsLinked to original sources
PubMed1980

Note on a failure to find hemispheric asymmetries for a small sample of strongly left- and right-handed males and females using verbal and visuo-spatial recall.

A column of letters was presented to the left, right, or center of the visual field of 10 male and 10 female subjects. 5 of each sex were either strongly left- or right-handed. The subjects' task was to position correctly the letters on a recall sheet. No significant hemispheric asymmetries emerged, a result that reflects other negative findings. The 10 females were significantly better at verbal identification; this was copngruent with the literature. The 10 males and 10 females were equal in visuo-spatial (positioning) judgments; this did not support the literature. The 5 right-handed males were significantly inferior to the 5 left-handed males and the 10 females at positioning judgments, a result that remained unexplained. The findings were discussed in terms of other contradictory findings.

Adolescent↗
PubMed1979

An examination of relationship between subliminal perception, visual information processing, levels of processing, and hemispheric asymmetries.

A sublimiinal letter was exposed to the left or right hemisphere for either 15 or 30 msec. Subjective guesses were more accurate for visuo-spatial positional recognition made to presentations in the right hemisphere whereas verbal recognition was more accurate to presentations in the left hemisphere. The 30-msec. exposure increased the accuracy of the guesses. These findings were discussed in terms of differential triggering mechanisms for levels of hemispheric processing.

Adult↗