Abstract
When the value of alternatives was even, which is easy for us to select the best one or the worst one? In order to explore the effect of the instruction for decision-making, we performed experimental study using a selection paradigm. The experiment was made up of two steps. In the first step, the subjects were asked to choose best three items from ten alternatives. In the second step, the subjects were asked to choose or discard the items from the three alternatives in four conditions: “choose one item”, “choose two items”, “discard one item” and “discard two items”. The results indicated that subjects took longer time in “discard two” condition than “choose two” condition. In addition, participants answered that ”two throw away” was more difficult than the other instructions in introspection. These results imply that discarding behaviour take much psychological load rather than choosing behaviour.
