Pesquisa de referências
Centro de Documentação

Using cerebral hemovelocity to measure workload during a spatialised auditory vigilance task in novice and experienced observers
Recurso electrónico / electronic resource
Registro MARC
Tag12Valor
LDR  00000cab a2200000 4500
001  MAP20130032634
003  MAP
005  20131008170708.0
008  131008e20130805esp|||p |0|||b|spa d
040  ‎$a‎​MAP‎$b‎​spa‎$d‎​MAP
084  ‎$a‎​875
24500‎$a‎​Using cerebral hemovelocity to measure workload during a spatialised auditory vigilance task in novice and experienced observers‎$c‎​Tyler H. Shaw...[et.al]
520  ‎$a‎​This experiment was designed to assess cognitive load using transcranial Doppler sonography during the performance of a 40-min communication vigilance task in which messages were presented in different spatial locations or across a single monaural radio channel. In addition, some observers received 14 hours of practice to determine whether the neurophysiological measure was sensitive to a potential attenuation of workload. Critical messages were detected more frequently in the spatialised audio presentation mode condition, but there were no performance differences between experienced and novice observers. Neurophysiological data show that activation was greater in the novice condition than in the experienced condition, suggesting that novice observers expended greater effort. Furthermore, the neurophysiological measure showed more activation in the monaural radio condition than in the spatialised audio condition. The results support a resource account of vigilance and suggest that cerebral blood flow velocity can be used to diagnose the degree of attentional resource utilisation during vigilance tasks.
7730 ‎$w‎​MAP20100019818‎$t‎​Ergonomics : the international journal of research and practice in human factors and ergonomics‎$d‎​Oxon [United Kingdom] : Taylor & Francis, 2010-‎$x‎​0014-0139‎$g‎​05/08/2013 Volumen 56 Número 8 - agosto 2013 , p. 1251-1263