Further studies found that task-irr

Further studies found that task-irrelevant VPL, at least in a setting similar to that in the 2001 study by the Watanabe group, does not occur without the involvement of reinforcing factors. Task-irrelevant VPL occurs only when the exposed 5% coherent motion direction is paired with a target in an RSVP task (Seitz&Watanabe 2003) and only when subjectsmake correct detections on targets, which might cause internal reward or satisfaction (Seitz et al. 2005a). Furthermore, VPL of the task-irrelevant 5% coherent motion direction occurs when the feature is paired with a reward and does not occur without a reward