Centre-of-Gravity Fixations in Visual Search: When Looking at Nothing Helps to Find Something
Figure 3
Effects of void fixations on stimulus fixations within a cluster. (a) The mean number of stimulus fixations within a cluster, depicted separately for instances in which there were no void fixations, one central or peripheral void fixation, and both central and peripheral void fixations into the cluster. Error bars depict 1 SEM and may be smaller than the plotting symbol. (b) The mean proportion of stimulus fixations within a cluster, depicted separately for instances in which 0, 1, 2, 3, 4, 5, or more stimulus fixations were made into a cluster. Results are depicted separately for the wide and narrow spacing conditions. (c) The mean dwell times of stimulus fixations within a given cluster, when observers had made 1, 2, or 3 stimulus fixations into a cluster, depicted separately for instances in which no void fixations, a central void fixation, or peripheral void fixations have been made into the cluster.
