Abstract
Three experiments were run to test effects of extraversion and self-report arousal on high event rate visual sustained attention tasks in which stimuli were degraded. Such tasks tend to show rapid perceptual sensitivity decrements, attributable to depletion of attentional resources. Across the three experiments, type of discrimination (simultaneous vs successive), type of task (sensory vs cognitive), and signal discriminability were manipulated. Results showed that higher self-report arousal consistently facilitated those sensory and simultaneous cognitive tasks which showed a significant sensitivity decrement. These findings support the hypothesis that increases availability of resources for sustained attention. In contrast, effects of extraversion on performance were inconsistent, and may depend on task-specific processing structures and strategies.
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