3 RESULTS
3.1 Odor familiarity test
As shown in Table 1, the odor familiarity of 70 kinds of odor descriptors was <75 points. Among the 64 odor descriptors in SSOI, 31 odor descriptors had a familiarity of <75 points; 23 distractors with odor familiarity >75 were selected to randomly replace the distractors with low familiarity in the first modification.