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Biomedical subjects

R D Nebes

Publications and source records attributed to R D Nebes.

67 records · Page 4Linked to original sources
PubMed1976

Verbal-pictorial recoding in the elderly.

Older individuals have been reported to use imagery mediation less often than the young in remembering verbal material. To determine whether this is due to a decrease with age in the speed with which verbal stimuli are recoded into pictorial representations, the reaction time of 12 old (63-78) and 12 young (17-25) subjects for matching verbal description to geometric shapes was measured. While the elderly were generally slower, they were identical to the young in being faster at determining whether or not two simultaneously presented shapes were the same than they were a printed description of a shape and a shape. Also, in both age groups, when 1 or more sec elapsed between the presentation of the description and that of the shape, matching times were as quick as when both stimuli were shapes, suggesting that, for the old as well as the young, 1 sec was sufficient time to recode the description into a pictorial form.

Adolescent↗
PubMed1975

Patterns of hand preference in a student population.

The handedness of 1599 college students was assessed using a modification of Annett's (1967) inventory. The addition of a strength of preference scale makes the "mixed" classification a better indicator of ambidexterity than in the original inventory by eliminating from it subjects who show preference for the same hand for nearly all tasks. Contrary to previous reports, sex was not significantly related to handedness. It was found that a family history of left-handedness was significantly related to the handedness of the subject. The present form of the Annett inventory provides an easily scorable inventory for determining handedness of large groups as well as for use in individual testing situations. A further advantage of the present inventory is the ease with which data may be transferred by key-punch operators prior to special analysis or sorting procedures.

Adolescent↗
PubMedDate not supplied

A positron emission tomography (PET) study of autobiographical memory retrieval.

Memory for the experiences of one's life, autobiographical memory (AM), is one of the most human types of memory, yet comparatively little is known of its neurobiology. A positron emission tomography (PET) study of AM retrieval revealed that the left frontal cortex was significantly active during retrieval (compared to memory control tasks), together with activation in the inferior temporal and occipital lobes in the left hemisphere. We propose that this left frontal lobe activation reflects the operation of control processes that modulate the construction of AMs in posterior neocortical networks.

Adult↗