Magnitude-sensitive reaction times reveal non-linear time costs in multi-alternative decision-making
Fig 7
(A) Stimuli example for human psychophysical experiments: Participants were requested to decide as fast and accurately as possible which of the three stimuli was brighter; they were asked to maintain fixation on the cross at the centre of the screen and minimise distraction for the short duration of the experiment. Unknown to participants, conditions of interest were conditions for which the stimuli had equal mean brightness. (B) Photograph showing a slime mould that chose one food alternative among three equal ones. The slime mould was placed in the centre of a petri dish (60 mm ⌀) filled with agar gel (10 g.L−1) at a distance of 2 mm from each food alternative.