d′ and variance of d′ for four-alternative forced choice (4-AFC).

作者: JIAN BI , HYE-SEONG LEE , MICHAEL O'MAHONY

DOI: 10.1111/J.1745-459X.2010.00301.X

关键词:

摘要: The four-alternative forced choice (4-AFC) is one of a family m-AFC tests used in Psychology. Based on detection-theoretic model, for given d′ it slightly more powerful than the 3-AFC and 2-AFC. Although its potential use sensory food science limited, there are occasions when will be used. Accordingly, tables values proportions correct responses (pc) along with corresponding B, computing variances, this paper. Power comparisons also made between 2-AFC, 4-AFC tests. PRACTICAL APPLICATIONS For difference testing, test depend several factors such as statistical power well various physiological cognitive effects. Because wide variation effects that personal product stimuli can have judges, important to variety methods available. Therefore, even less common need considered. certainly suitable visual judgments. method, appropriate B variances.

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