The Experimental Research On Delayed-JOL Effect

There are two kinds of hypotheses regarding to delayed-JOL effect, which are memory hypothesis and metamemory hypothesis. We devise two experiments which are aimed at the controversy between memory hypothesis and metamemory hypothesis,and the controversy about one of metamemory hypothesis called MDM hypothesis(short for monitoring-dual-memories hypothesis), respectively.Both the memory hypothesis and the metamemory ackonwledge that the accuracy of JOL increases when in delayed-JOL than immediate-JOL. However, the explanation of these two hypotheses on the mechanism of this phenomenon differ substantially. The metamemory hypothesis believes that delayed–JOL effect is because of its improvement of metamemory while the memory hypothesis suppose that delay-JOL simply affect memory, not metamemory. Through these research before, we believe these two hypotheses are not either-or. Namely, delay-JOL affect memory as well as metamemory.In the first experiment, we remove the memorial difference between delay-JOL and immediate-JOL by setting in a preliminary test between JOL and final test. The result show the memory scores in immediate-JOL set in a preliminary test and delayed-JOL has no significant difference. However, the accuracy of delayed-JOL substantially is high than the accuracy of immediate-JOL set in a preliminary test. This result confirms that the delayed-JOL indeed improves the accuracy of metamemory, it affects memory as well as metamemory.Now that we have proved the delayed-JOL improve metamemory in the first experiment, we continue to study the mechanism of this improvement in the second experiment. There are three types of metamemory hypothesis of which the MDM hypothesis is most influential and controversial. There are many researches supporting this hypothesis, but Kelemen and Weaver′s study has challenged it. But in the condition of traditional procedure they could only judge the removement of STM by imagination or presumption. When setting in distractive assignment, whether the STM is removed or not and the extent of removement can not be measured. By using PRAM method, we can observe the score of pre-judgment recall. The result of this experiment manifest G-Word distractive assignment can′t remove STM effectively. Through correlation analysis, we find the accuracy of JOL is correlated to the removement of STM. The accuracy improves with the extent of removement in STM. So we believe the delayed-JOL effect actually because of its almost thoroughly removement of STM. Our study has confirmation as well as generalized the MDM hypothesis.