A type of psychophysical measurement method. Subjects are presented with pairs of stimuli and asked to rate or select the magnitude of their sensory impressions, whether they like it or not, in order to quantify the subjective value of the stimuli. This method is highly valued as a sensory test method in fields where there are no other measurement methods available other than human sensory judgment. It is assumed that there exists a sensory quantity that fluctuates by chance as a basis for comparison, and LL Thurston's law of comparative judgment is applied. Judgments can be biased depending on the time, order, and combination of stimulus presentation, so various experimental design methods and methods for calculating scale values have been devised. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
精神物理学的測定法の一種。被験者に刺激を2つずつ組にして提示し,感覚的印象の大小や好嫌などについて評定あるいは選択させ,刺激の主観的価値を計量化する方法。人間の感覚的判断以外に計測法がないような分野において官能検査法の一つとして重用されている。比較の基礎として偶然的な変動をする感覚量が存在すると仮定し,L.L.サーストンの比較判断の法則などが適用される。刺激提示の時間,順序,組合せ方によって判断にバイアスがかかるので,実験計画法や尺度値の計算法にいろいろの考案がなされている。
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