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The role of novel semantic association in the promoting effect of insight on memory

suitable answer to the Chengyu riddle from four options; after one week, in the testing phase they were asked to recall the answer that they chose in the learning phase. The novel association and normal association condition were distinguished according to the selections of participants. The paradigm used in Experiment 2 was similar to that of Experiment 1. Additionally, the functional Magnetic Resonance Imaging (fMRI) was used to record the neural activity in the learning phase. The results of Experiment 1 showed that the score of Aha experience in the learning phase and accuracy in the testing phase were significantly higher in the novel association condition compared to the normal association condition. In addition, Experiment 2 showed that the activity in the brain regions related to insight, including the hippocampus, amygdala, middle frontal gyrus, superior temporal gyrus and middle temporal gyrus, were significantly greater in the successful recall compared to the failed recall in novel association condition. Further analysis indicated that successful recall of novel association involved more activity in the right hippocampus compared to the recall of normal association. The current study verified the promoting effect of insight on memory, and indicated that forming novel semantic associations and related activity in the hippocampus may underlie this effect.