Execution in selection task depends on Chrysippus’ criterion for the conditional

Wason’s selection task is a current cognitive problem. It is a reasoning task including a conditional sentence that only sometimes is correctly solved by participants. It has been claimed that the versions of the task that are often properly executed are only those in which the conditional sentence fulfills the criterion given by Chrysippus of Soli for the conditional. In this paper, this point is checked by considering a relevant number of versions of the aforementioned task in order to review whether or not their conditionals meet Chrysippus’ requirement.