Madigan N K, Ehrlichman H, Borod J C
Department of Psychology, Queens College, City University of New York, Flushing 11367-1597.
Percept Mot Skills. 1994 Aug;79(1 Pt 1):27-32. doi: 10.2466/pms.1994.79.1.27.
Pleasant and unpleasant odors were presented to 20 subjects in two same-valence blocks, i.e., all pleasant ones first, all unpleasant ones second, or vice versa, and in alternation. Hedonic ratings increased for the second block of odors which followed the first block of oppositely valenced odors. Alternation did not appear to affect hedonic ratings. These findings suggest that presentation of odors can alter hedonic ratings, producing a contrast effect when odors are given in a blocked fashion.
向20名受试者呈现愉快和不愉快的气味，分为两个相同效价的组块，即先呈现所有愉快的气味，再呈现所有不愉快的气味，或者反之，且交替进行。与第一组块中效价相反的气味之后的第二组块气味的享乐评分有所增加。交替呈现似乎并未影响享乐评分。这些发现表明，气味的呈现可以改变享乐评分，当以组块方式呈现气味时会产生对比效应。
