Not all fixations are created equal: The benefits of using ex-Gaussian modeling of fixation durations.

ABSTRACT: Various cognitive and perceptual factors have been shown to modulate the duration of fixations during visual exploration of complex scenes. The majority of these studies have only considered the mean of the distribution of fixation durations. However, this distribution is skewed to the right, so that an increase in the mean may be driven by a lengthening of all fixations (i.e., a right shift of the whole distribution) or only the relatively longer ones (i.e., a longer right tail of the distribution). To determine which factor is at play, the distribution can be modeled with an ex-Gaussian distribution, which is a convolution of a Gaussian and an exponential distribution. Here we demonstrate the usefulness of applying the ex-Gaussian model to empirical distributions of fixation durations an

SUBMITTER: Guy N 

PROVIDER: S-EPMC7545065 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature