Artículos de revistas
Effects of intensity and positional predictability of a visual stimulus on simple reaction time
Fecha
2011Registro en:
NEUROSCIENCE LETTERS, v.487, n.3, p.345-349, 2011
0304-3940
10.1016/j.neulet.2010.10.053
Autor
CARREIRO, Luiz Renato Rodrigues
HADDAD, Hamilton
BALDO, Marcus Vinicius Chrysostomo
Institución
Resumen
The influence of visual stimuli intensity on manual reaction time (RT) was investigated under two different attentional settings: high (Experiment 1) and low (Experiment 2) stimulus location predictability. These two experiments were also run under both binocular and monocular viewing conditions. We observed that RT decreased as stimulus intensity increased. It also decreased as the viewing condition was changed from monocular to binocular as well as the location predictability shifted from low to high. A significant interaction was found between stimulus intensity and viewing condition, but no interaction was observed between neither of these factors and location predictability. These findings support the idea that the stimulus intensity effect arises from purely sensory, pre-attentive mechanisms rather than deriving from more efficient attentional capture. (C) 2010 Elsevier Ireland Ltd. All rights reserved.