Wason's rule discovery task

We investigated whether thinking in opposites can facilitate the solution process in Wason’s rule discovery task. Participants were exposed to three conditions: training prompting an analysis of the properties characterising the initial seed triple; training prompting the same action but subsequently demanding the identification of the opposites of each property and using it in the testing phase; and a no-prompt condition. Thinking in opposites turned out to be beneficial, almost doubling success rate.