受試者在認出單一向度和連言概念的屬性時，並非根據一組刺激型態，而是根據一個屬性列表。受試者係每次選擇一個屬性（單一向度概念）或兩個屬性（連言概念）來檢驗其策略。實驗者預先選定正確策略，然後按照策略選擇理論就受試者所選策略為正確、錯誤、或無關，而給予適當的反饋。以呈現一組刺激型態的控制組為基準，實驗組的受試者須要更多次的嘗試才可認出概念屬性。結論是受試者可在連續嘗試中比較所選取的刺激，而能更有效地處理有關訊息，這表示正確、錯誤以及無關策略的選擇機率會在作業過程中突然改變。

　　　　　Subjects were given the attribute-identification task of unidimensional and conjunctive concepts under a condition in which a list of attributes instead of an array of stimulus patterns was available. Subjects tested their strategies by selecting one attribute (unidimensional concepts) or two attributes (conjunctive concepts) at a time. Since a correct strategy was chosen by the experimenter in advance, an appropriate feedback could be given depending on subjects' selecting a correct, a wrong, oran irrelevant strategy as specified by the strategy-selection theory. In comparison with a control condition in which an array of stimulus patterns was shown, subjects took a greater number of trials to reachthe criterion. It was concluded that subjects seemed to process information quite efficiently by comparing the stimuli selected on the successive trials to arrive at the correct strategy in the usual condition of attribute identification. This means that the selection probabilities of a correct, a wrong, or an irrelevant strategy may change suddenly in the course of the task.