Biomedical subjects

Michal Lavidor

Publications and source records attributed to Michal Lavidor.

23 records · Page 2Linked to original sources

PubMed2002

Orthographic neighborhood effects in the right but not in the left cerebral hemisphere.

Two lexical decision experiments investigated orthographic neighborhood effects in the hemispheres. In the first experiment, lexical decision was affected by orthographic neighborhood size when stimuli were presented to the right hemisphere (RH) but not to the left hemisphere (LH). In a four-field masked-prime lexical decision task (Experiment 2), a larger shared orthographic neighborhood between prime and target facilitated lexical decision in the RH but not in the LH. The patterns of activation invoked in the two cerebral hemispheres by a written word and its orthographic neighbors may be qualitatively different.

Adolescent↗

PubMed2002

Word length and orthographic neighborhood size effects in the left and right cerebral hemispheres.

Previous studies have reported an interaction between visual field (VF) and word length such that word recognition is affected more by length in the left VF (LVF) than in the right VF (RVF). A reanalysis showed that the previously reported effects of length were confounded with orthographic neighborhood size (N). In three experiments we manipulated length and N in lateralized lexical decision tasks. Results showed that length and VF interacted even with N controlled (Experiment 1); that N affected responses to words in the LVF but not the RVF (Experiment 2); and that when length and N were combined, length only affected performance in the LVF for words with few neighbors.

Adolescent↗

PubMed2002

Case alternation and length effects in lateralized word recognition: studies of English and Hebrew.

Effects of CaSe AlTeRnAtIoN were studied in two lateralized visual lexical decision experiments. We manipulated word length and letter case (UPPER, lower and MiXeD) in both English (Exp. 1, N=60) and Hebrew (Exp. 2, N=60). The previously reported visual field and word length interaction was found for upper and lower case presentation, but not for MiXeD CaSe, where both fields were affected by word length. The effects of case alternation are discussed in light of a new lateralized word recognition theory.

Adolescent↗

PubMed2002

Multidimensional fatigue, somatic symptoms and depression.

OBJECTIVES: Assess the moderating role of somatization on depression in the perception of fatigue for a healthy adult population. DESIGN: Correlational survey. METHODS: Several fatigue questionnaires, a mental health inventory, somatic complaints and demographic data were collected from a targeted, randomly selected adult sample (N = 278). RESULTS: Depression levels were positively and significantly related to all aspects of fatigue except fatigue that responds to rest and sleep (i.e. tiredness). When high levels of depression were coupled with somatization, fatigue complaints were more severe. CONCLUSIONS: Even within a non-patient population, somatization and depression had interactive effects on fatigue. Somatization increased fatigue level for the relatively dysphoric individuals.

Journal Article↗

PubMedDate not supplied

An examination of the lateralized abstractive/form specific model using MiXeD-CaSe primes.

CaSe AlTeRnAtIoN effects on the two cerebral hemispheres were studied in a lateralized visual lexical decision task with 32 right-handed participants. The study aimed to compare two well-known lateralization theories, the two processing modes and the abstractive/form-specific theories, that differ in the predictions regarding case alternation effects on the hemispheres. The experiment employed the masked priming paradigm, where prime and target words were presented in mixed case. The results of the experiment demonstrated no hemispheric differences in priming size when prime and target were similar in (mixed) case, thus were in line with the two modes theory. However, a new interpretation to the abstractive/form-specific model may also account for the results.

Adolescent↗