Abstract
This article investigated a method encouraging leaners to apply the rule that if a plant has flowers then it has seeds(called“p]an-reproduction rule”). Concretely, We proposed teaching a rule that if a plant-A resembles a plant-B in shapes of flowers, they would also resemble each other with respect to the shape of fruits and seeds (called “plant-shape rule”) in rule is considered an attribution rule. University students participated in the experiment. The main results were as follows. (1) The experimental group judged whether the pants having flowers have seeds and whether the pants having seeds have flowers more correctly than the control group. (2) In the experimental group many of those who couldn’t accept the converse of the plant-reproduction rule even succeeded in the latter judgment. The obtained results were discussed from the view-point of the abductive reasoning and availability of the rule.
