Behavioural accuracy (A) and response time (B) in the discrimination task.

<p>Bars show grand average behavioural accuracy as percentage correct (A) and grand average response time in seconds (B) within each condition (easy near, easy far, difficult near, difficult far). Markers indicate individual subject averages where each unique marker (combination of colour and shape) represents the same subject. On average subjects were less accurate with longer response times in the difficult conditions than in the easy conditions. No significant differences were found between behavioural accuracy or response time in the near and far spatial attention conditions for equal difficulty level.