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首页> 外文期刊>Food Quality and Preference >The four-interval, two-alternative forced-choice (4I2AFC): A powerful sensory discrimination method to detect small, directional changes particularly suitable for visual or manual evaluations
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The four-interval, two-alternative forced-choice (4I2AFC): A powerful sensory discrimination method to detect small, directional changes particularly suitable for visual or manual evaluations

机译：四间隔，双替代强制选择（4i2AFC）：一种强大的感官辨别方法，用于检测小，定向变化特别适用于视觉或手动评估

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The four-interval, two-alternative forced-choice (4I2AFC) is a paired version of the 2-AFC with AB and BA pairs as two alternatives, where A is a signal or a stronger stimulus and B is a noise or a weaker stimulus. The task of the subject in 4I2AFC is to select the pair (AB) with decreasing stimuli change. The 4I2AFC is a powerful sensory discrimination forced-choice method to detect small, directional changes of stimuli particularly suitable for visual or manual evaluations with less sensory fatigue. This paper explores the 4I2AFC method and includes an applied illustrative case study for measuring facial skin smoothness visually using the method. An analytical psychometric function is derived. The performances of the 4I2AFC in both difference testing and similarity/equivalence testing are compared with those of the conventional sensory discrimination forced-choice methods. The 4I2AFC is theoretically more powerful than any of the published conventional methods including the tetrads.
机译：四个间隔，双替代强制选择（4i2AFC）是2-AFC的配对版本，AB和BA对作为两个替代方案，其中A是信号或更强的刺激，B是噪音或较弱的刺激 。 4i2AFC中的主题的任务是选择对刺激变化的降低。 4i2AFC是一种强大的感官辨别强制选择方法，用于检测刺激的小，定向变化，特别适用于具有较小感觉疲劳的视觉或手动评估。 本文探讨了4I2AFC方法，包括应用说明性案例研究，用于使用该方法在视觉上测量面部皮肤平滑度。 派生分析心理学函数。 将4i2AFC在差异测试和相似性测试中的性能与传统感官辨别强制选择方法的比较进行了比较。 4i2AFC在理论上比任何公开的传统方法都更强大，包括四边形。

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