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Titolo:
GAP EFFECT AND REACTION-TIME DISTRIBUTION - SIMPLE VS CHOICE MANUAL RESPONSES
Autore:
MACHADOPINHEIRO W; GAWRYSZEWSKI LG; RIBEIRODOVALLE LE;
Indirizzi:
UNIV FED FLUMINENSE,INST BIOMED,DEPT FISIOL,RUA HERNANI MELLO 101 BR-24210130 NITEROI RJ BRAZIL UNIV FED FLUMINENSE,INST BIOL,DEPT NEUROBIOL BR-24210130 NITEROI RJ BRAZIL UNIV SAO PAULO,INST CIENCIAS BIOMED,DEPT FISIOL & BIOFIS BR-05508 SAOPAULO BRAZIL
Titolo Testata:
Brazilian journal of medical and biological research
fascicolo: 10, volume: 31, anno: 1998,
pagine: 1313 - 1318
SICI:
0100-879X(1998)31:10<1313:GEARD->2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIXATION-POINT OFFSETS; HUMAN EXPRESS SACCADES; VISUAL-ATTENTION; WARNING SIGNALS; HAND MOVEMENTS; EYE-MOVEMENTS; LATENCY;
Keywords:
ATTENTION; REACTION TIME; GAP EFFECT; VISION; EXPRESS RESPONSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
W. Machadopinheiro et al., "GAP EFFECT AND REACTION-TIME DISTRIBUTION - SIMPLE VS CHOICE MANUAL RESPONSES", Brazilian journal of medical and biological research, 31(10), 1998, pp. 1313-1318

Abstract

It is well known that saccadic reaction times (SRT) are reduced when the target is preceded by the offset of the fixation point (FP) - the gap effect. Some authors have proposed that the FP offset also allows the saccadic system to generate a separate population of SRT, the express saccades. Nevertheless, there is no agreement as to whether the gap effect and express responses are also present for manual reaction times (MRT). We tested the gap effect and the MRT distribution in two different conditions, i.e., simple and choice MRT. In the choice MRT condition, subjects need to identify the side of the stimulus and to select the appropriate response, while in the simple MRT these stages are not necessary. We report that the gap effect was present in both conditions (22 ms for choice MRT condition; 15 ms for simple MRT condition), but, when analyzing the MRT distributions, we did not find any clearevidence for express manual responses. The main difference in MRT distribution between simple and choice conditions was a shift towards shorter values for simple MRT.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 02:18:14