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Biomedical subjects

L Leiber

Publications and source records attributed to L Leiber.

7 recordsLinked to original sources
PubMed1982

Interhemispheric effects in short-term recognition memory for single words.

Twenty undergraduate men participated in a short-term recognition memory experiment in which single words of four types, classified by high and low imagery value and high and low Thorndike-Lorge frequency, were each presented twice unilaterally to the right and left visual fields (RVF, LVF). Stimuli were projected either to the same or to the opposite visual field on successive presentations. Results showed that: (1) imagery value affected responses to initial presentations, but not to repetitions; and (2) the speed and accuracy of recognizing repetitions in the LVF were the same whether the stimuli had been presented initially to the LVF or the RVF, whereas speed and accuracy in the RVF were significantly poorer for words initially presented to the LVF than for words initially presented to the RVF. The latter findings are consistent with differential encoding or with asymmetrical storage of verbal information in the two hemispheres, but not with the hypothesis that the memory store for words is confined to the language-dominant hemisphere.

Adolescent↗
PubMed1981

Not all sinistrality is pathological.

Information regarding age, sex, birth stress, and handedness was obtained form 762 university faculty members and 1869 undergraduate and medical students, who also provided age, sex, and handedness information for their first-degree relatives. In addition, students reported the occupations and educational levels of their parents. Analyses of the effects of birth order, reported birth stress, and maternal, paternal, and joint parental age showed that an increased incidence of sinistrality was only rarely associated with high birth risk; in all cases, the effects were confined to male subjects, most frequently male faculty members. Sinistrality was not associated with low socioeconomic status; on the contrary, there were significantly more sinistrals among parents of high than of low educational and occupational levels. The pathogenic hypothesis has other implications which fail to find support in the current literature, thus casting further doubt on the proposition that all sinistrality is pathological in origin.

Adolescent↗
PubMed1978

Classification of random forms and distortions presented to the left or right visual field.

Twenty right-handed undergraduate men were taught in free vision to categorize distortions of prototypic random forms and were then tested in a Go/No Go task with lateralized tachistoscopic presentations of previously sorted (old) distortions, new distortions, the prototypes, and unrelated forms. Accuracy of performance on positive items increased in the order New less than Old less than Prototype. More false alarms occurred to unrelated items in the right than in the left visual field, suggesting that the trace systems generated during training had different characteristics in the two hemispheres.

Discrimination Learning↗
PubMedDate not supplied

The communication of affection between cancer patients and their spouses.

Thirty-eight patients receiving chemotherapy for advanced cancer and 37 of their spouses were studied to assess changes since illness in the desire for affection (sexual, physical, and verbal) and changes in actual affectional behavior. Each participant in the study was interviewed and then completed the Beck Depression Inventory and an Affectional Needs and Behavior Scale. Results indicated that patients and spouses of both sexes experienced simultaneously an increase in the desire for physical closeness and a decrease in the desire for sexual intercourse. Women patients and their husbands were in greater agreement regarding the changes assessed than were men patients and their wives. In addition, women patients reported the highest level of depression, but were more likely than the other groups to have their affectional needs met. Interpretations of these findings and implications for the management of patients in advanced stages of life-threatening illness are discussed.

Depression↗