Search PubMed⌕ Search

Biomedical subjects

J Vaid

Publications and source records attributed to J Vaid.

31 records · Page 2Linked to original sources
PubMed1989

Mirror writing: an advantage for the left-handed?

It has been claimed that left-handed individuals are better than right-handers at writing in a mirror script (R. Tankle & K. Heilman, 1983, Brain and Language, 19, 115-123). We tested this claim by comparing the mirror writing ability of normal right- and left-handed adults as a function of hand used and hand use order. Our results do not support the notion of a left-hander superiority in mirror writing since, in two different experiments, right-handed individuals were found to be as good as left-handers. Instead, we obtained evidence for an order effect such that in both experiments, mirror writing was faster in those who started the task with their right hand.

Adult↗
PubMed1988

Asymmetries in tachistoscopic word recognition: scanning effects re-examined.

To investigate the role of scanning biases in visual half field studies, native readers of Hindi (a language written and read from left-to-right) and Urdu (a language written and read from right to left) were tested in a language analogue of the Stroop paradigm. Subjects had to identify the script (Hindi vs. Urdu) in which the words referring to the two languages Hindi and Urdu were presented. Greater RVF than LVF interference was obtained in both groups, indicating a left hemisphere specialization for lexical functioning independent of scanning biases.

Dominance, Cerebral↗
PubMed1988

Erythrocyte membrane alterations in enzootic bovine hematuria.

Erythrocyte membrane enzymes and chemical constituents were studied in animals presenting enzootic bovine hematuria (EBH) and in normal animals. Mg2+-ATPase, Na+, K+, Mg2+-ATPase and ouabain insensitive Na+, K+, Mg2+-ATPase activity were decreased significantly in the affected animals. Cholesterol:phospholipid and sialic acid:phospholipid ratios also decreased in animals suffering from EBH. No significant changes were found in acetylcholinesterase, sialic acid, sulfhydryl groups and cholesterol in membranes of affected animals.

Animals↗
PubMed1987

Visual field asymmetries for rhyme and syntactic category judgments in monolinguals and fluent early and late bilinguals.

A tachistoscopic study investigated hemispheric specialization among monolingual and fluent French-English bilingual adults for speeded rhyme and syntactic category matching. A right visual field superiority was obtained for both types of verbal judgments. This effect was more pronounced in late bilinguals than in early bilinguals or monolinguals. In addition, bilingual subgroup differences in response latency and strategy were found, suggesting a preference for semantic processing among early bilinguals and for surface processing among late bilinguals, consistent with previous findings. Possible theoretical implications of these differences are outlined.

Adult↗
PubMed1986

Methodological issues in the use of the concurrent activities paradigm.

This paper presents a critical analysis of one type of dual-task procedure, the lateralized concurrent activities paradigm. Extrinsic and intrinsic factors that may influence the interpretation of results obtained with this paradigm are isolated and methodological refinements in experimental design and analysis are suggested.

Age Factors↗
PubMed1981

Chronic aflatoxicosis in cattle.

Pathological, hematological and plasma enzymatic studies were made on milk cattle affected by chronic aflatoxicosis caused by the prolonged feeding of concentrate feed mixtures containing contaminated groundnut cake having aflatoxin B1 (110 ug/kg groundnut cake at the time of sampling), B2, G1 and G2. Clinical and necropsy observations on liver included proliferation of connective tissue along portal triads leaving small group of hepatocytes intact. Liver function tests showed liver damage in three of the four affected animals studied.

Aflatoxins↗
PubMedDate not supplied

Reading/writing vs handedness influences on line length estimation.

Left- and right-handed school children with differing reading/writing experiences (unidirectional left-to-right vs bidirectional) were asked to draw 3-cm lines from right-to-left or from left-to-right with each hand. With either hand, lines drawn from left to right were more accurate than those drawn from right to left, particularly for right-handed left-to-right users; bidirectional readers showed no directional bias. Moreover, bidirectional readers were more accurate than unidirectional readers. The findings support a greater influence of directional scanning effects than handedness on the task of line length estimation.

Child↗