| number.intersections {ForagingOrg} | R Documentation |
Counter for the number of intersections of non-consecutive trajectories between targets among a scanpath in a foraging task.
Description
This function counts the number and rate of intersections between non-consecutive targets in a scanpath.
Usage
number.intersections(x, y)
Arguments
x |
A vector with the x coordinates of the targets collected in a foraging task. |
y |
A vector with the y coordinates of the targets collected in a foraging task. |
Details
The number of intersections between non-consecutives scanpaths in a foraging task is taken as a foraging organization measure (Ólafsdóttir et al., 2021; Woods et al., 2013). Here we developed an algorithm based on function analysis and Bolzano's Theorem (e. g. Apostol, 1974) to calculate the number of intersections.
Value
A numeric value with the number of intersections in a scanpath.
Author(s)
Marcos Bella-Fernández
References
Apostol, T. M. (1974) Mathematical Analysis (2nd Edition). Addison Wesley Longman.
Ólafsdóttir, I. M., Gestdóttir, S., & Kristjánsson, Á. (2021) The development of foraging organization. Attention, Perception, & Psychophysics, 83, 2891-2904.
Woods, A. J., Göksun, T., Chatterjee, A., & Zelonis, S. (2013) The development of organized visual search. Acta Psychologica, 143, 191-199.