Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 2

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  LATERALIZATION
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

The influence of lateral implicit visual affective stimuli on the evaluation of neutral stimuli in humans

100%
Kobylinska D., Karwowska D.
|
EN
It is now well established that implicit affect influences explicit judgments. Findings from neurobiological studies indicate a relationship between the functioning of the human cerebral hemispheres and emotions. The aim of the present research was to examine: (1) the direction of influence on neutral targets of suboptimal primes exposed for a duration of 16 ms, (2) whether the influence of affective suboptimal primes on neutral targets depends on the hemisphere to which the prime is directed. We predicted that affective primes exposed centrally would influence the evaluation of neutral target stimuli in a direction opposite to that of their explicit effect. Second, we posited that the influence of primes on the evaluation of neutral target stimuli would be different depending on the visual field in which the primes were exposed. We present combined data from four experiments, conducted in a visual affective priming paradigm. Neutral target stimuli (ideographs exposed for a duration of 2 seconds) were sub-optimally primed by photographs of faces expressing joy or disgust exposed in either the LVF, RVF or CVF. Subjects were asked ?to state how negative/positive the character trait that is represented by a given ideograph is'. The hypotheses were supported. The evaluation of ideographs after negative priming was more positive than the evaluation of ideographs after positive priming (indicating a contrast effect). This effect appeared only when affective priming stimuli were exposed in the central visual field. The evaluation of ideographs differed depending on the visual field of prime exposure conditions: exposure of affective primes in the right visual field resulted in more positive evaluations of ideographs than ideographs following primes in the left visual field.
2
Content available remote

Categorization of unilaterally presented emotional words: an ERP analysis

80%
Schapkin S. A., Gusev A. N., Kuhl J.
Acta Neurobiologiae Experimentalis
|
2000
|
vol. 60
|
issue 1
17-28
EN
This study is intended to clarify the functional role of different ERP components as indicators of the processing of emotions. The effect of emotional connotation of words on hemispheric lateralization is also explored. Visual ERPs were recorded to unilaterally presented positive, negative, and neutral words that should be categorized according to their emotional connotation. The P2 amplitude was larger to positive than to negative words whereas P3 amplitude was larger to positive words compared with neutral ones. The slow positive wave (SPW) was influenced by words emotionality at anterior and posterior sites differently. The amplitude of the N1 component was larger in the left hemisphere to contralaterally presented words. The P2 and P3 components were larger over the left hemisphere whereas the N3 and N4 components were larger over the right hemisphere to ipsilateral stimulation. The results support our hypotheses on the functional role of positive ERP components in the processing of an affective words connotation: the P2 wave reflects a general evaluation of emotional significance, the P3 a task-related decision, and the SPW an additional decision control in the context of the emotional experience of an individual. Neither the 'right hemisphere hypothesis' nor 'valence hypothesis' on lateralization of the processing of emotions were confirmed. Each hemisphere seems to exert its effect on emotion through specific hemispheric resources that are unequally allocated along the different stages of task processing and may cause alternation of hemispheric dominance.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.