Jonckheere's trend tests on the results show a reliable trend in the inferences from the counterfactual in isolation, the counterfactual in the context of a story-without-counterexamples, and the counterfactual in the context of a story-without-if-only, for modus ponens (86%, 68% and 42%, J = 942, N = 63, p = .001), modus tollens (81%, 59%, 48%, J = 865, p = .007), affirmation of the consequent (63%, 44%, 39%, J = 815, p = .043) and the denial of the antecedent inferences (58%, 41%, 32%, J = 819, p = .036).
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