| Looking for the GAP effect in manual responses and the role of contextual influences in reaction time experiments. | |
| | |
MedLine Citation:
|
PMID: 15273818 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
When the offset of a visual stimulus (GAP condition) precedes the onset of a target, saccadic reaction times are reduced in relation to the condition with no offset (overlap condition) - the GAP effect. However, the existence of the GAP effect for manual responses is still controversial. In two experiments using both simple (Experiment 1, N = 18) and choice key-press procedures (Experiment 2, N = 12), we looked for the GAP effect in manual responses and investigated possible contextual influences on it. Participants were asked to respond to the imperative stimulus that would occur under different experimental contexts, created by varying the array of warning-stimulus intervals (0, 300 and 1000 ms) and conditions (GAP and overlap): i) intervals and conditions were randomized throughout the experiment; ii) conditions were run in different blocks and intervals were randomized; iii) intervals were run in different blocks and conditions were randomized. Our data showed that no GAP effect was obtained for any manipulation. The predictability of stimulus occurrence produced the strongest influence on response latencies. In Experiment 1, simple manual responses were shorter when the intervals were blocked (247 ms, P < 0.001) in relation to the other two contexts (274 and 279 ms). Despite the use of choice key-press procedures, Experiment 2 produced a similar pattern of results. A discussion addressing the critical conditions to obtain the GAP effect for distinct motor responses is presented. In short, our data stress the relevance of the temporal allocation of attention for behavioral performance. |
| | |
Authors:
|
A J P Faria; W Machado-Pinheiro |
Related Documents
:
|
18531128 - Acoustic communication in panthera tigris: a study of tiger vocalization and auditory r... 20232128 - Sensory information in local field potentials and spikes from visual and auditory corti... 1556308 - The detection of temporal gaps as a function of frequency region and absolute noise ban... 9566328 - "central" auditory gap detection: a spatial case. 6438998 - Labelled leucine uptake in the visual cells and pigment epithelium of young albino rats... 10677548 - Gamma rhythms and beta rhythms have different synchronization properties. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2004-07-20 |
Journal Detail:
|
Title: Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas / Sociedade Brasileira de Biofísica ... [et al.] Volume: 37 ISSN: 0100-879X ISO Abbreviation: Braz. J. Med. Biol. Res. Publication Date: 2004 Aug |
Date Detail:
|
Created Date: 2004-07-26 Completed Date: 2005-04-04 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 8112917 Medline TA: Braz J Med Biol Res Country: Brazil |
Other Details:
|
Languages: eng Pagination: 1175-84 Citation Subset: IM |
Affiliation:
|
Laboratório de Neurofisiologia do Comportamento, Departamento de Fisiologia e Farmacologia, Instituto Biomédico, Universidade Federal Fluminense, Niterói, RJ, Brazil. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Analysis of Variance Attention / physiology* Female Humans Male Photic Stimulation / methods* Reaction Time / physiology* Saccades / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Relative contribution of expectancy and immediate arousal to the facilitatory effect of an auditory ...
Next Document: Antagonist G-mediated targeting and cytotoxicity of liposomal doxorubicin in NCI-H82 variant small c...