Vitesse du processus et temps partagé : planification et concurrence attentionnelle

Summary : Process speed and time-sharing : Planning and attentional concurrence. This experiment, carried out on a dynamic microworld described to the subjects as the command of units fighting against forest fires, reproduces the results of a previous experiment (Hoc & Moulin, 1994), which showed a stability in performance between a high and a low process speed. By interposing a medium speed between the two extreme speeds, the present experiment showed an optimum effect that provides us with more evidence in favour of a strategy shift. Performance stability can be interpreted as the result of shifting from a reactive strategy to an anticipative one progressively reaching the subjects' competency limit. On the other hand, by introducing conditions of time-sharing task management (several fires), a progressive improvement in performance was shown in relation to the reduction of attentional concurrence at the planning step.