Figure 13.

Attention sampling from a fixed location. A channel opens for transfer of information from location 1, but it has a minimum duration or dwell time before it can close again, typically no less than 200 ms (Duncan et al., 1994; Theeuwes, Godin, & Pratt, 2004). During that time, the alternating stimulus cycles between the two values and the resulting interruptions degrade the ability to identify and combine the colors and motions appropriately.