Skip to main content
Fig. 11 | Attention, Perception, & Psychophysics

Fig. 11

From: Feature integration theory in non-humans: Spotlight on the archerfish

Fig. 11

Mean reaction-time slopes per species per task. (A) Mean human reaction-time slopes for each task: color 0.9 ± 0.67 ms/item, size 1.1 ± 0.2 ms/item, orientation 1.3 ± 0.7 ms/item, motion 0.4 ± 0.7 ms/item, Disk vs. PacMen 2.8 ± 0.8 ms/item, Qs vs. Os 0.96 ± 0.28 ms/item, large-and-blue 3.7 ± 0.5 ms/item, small-and-blue 8.8 ± 1.6 ms/item. Black dashed line at 5 ms/item splits the bars into two search mode groups. This threshold is based on the slope intervals suggested by Wolfe (Wolfe, 1998a). (B) Mean fish reaction-time slopes per task: color -1.7 ± 5.4 ms/item (N = 9), size 11.8 ± 6.4 ms/item (N = 8), orientation 14.2 ± 11.6 ms/item (N = 4), and motion 22.9 ± 3.3 ms/item (N = 3), Disk vs. Pac Men 76.7 ± 17.6 ms/item (N = 3), Q vs. Os -3.1 ± 14.9 ms/item (N = 3), large-and-blue 10.3 ± 7.7 ms/item (N = 4), small-and-blue 81.3 ± 6.9 ms/item (N = 3). Black dashed line at 45 ms/item splits the bars into two search mode groups. This threshold was obtained by applying Otsu's method (Otsu, 1979) as well as k-means (with k=2) clustering (MacQueen, 1967) on the histogram of all search slopes obtained in our experiments on fish. This threshold splits the slope population into efficient and inefficient slope searches

Back to article page