Related Experiment Video
Updated: Jul 9, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
Published on: March 1, 2022
Twin analysis on paired comparison data
1Japan Science and Technology Agency, 2-22-23-505 Higashi-Nakano Nakano-ku, Tokyo 164-0003, Japan. kouken@totcop.jp
Abstract:
Current behavior genetic models can only employ limited types of phenotypic data, such as Likert scale data or continuous data, as variables. Here, a new method employing paired comparison data is presented within the framework of behavior genetic models. This model facilitates the estimation of genetic, shared environmental, and non-shared environmental contributions to paired comparison variables. Paired comparison methods are sensitive to differences in preferences between items, even when the true preferences are markedly similar. An extended model that combines Likert variables, and which enables the estimation of genetic, shared environmental, and non-shared environmental correlations, is also presented. Simulations are then performed to demonstrate the characteristics of these models. Finally, a real data example is introduced. Mplus script is included in the appendix.
Related Concept Videos
Sign Test for Matched Pairs
To conduct the sign test, we first calculate the differences in value between...
Comparing Experimental Results: Student's t-Test
Friedman Two-way Analysis of Variance by Ranks
Wilcoxon Signed-Ranks Test for Matched Pairs
Multiple Comparison Tests
It would be easy to compare two samples using a significance alpha level of 0.05. In other words, there is only one sample pair to be compared. However, it would be difficult to identify a significantly different sample if the number...
Two-Way ANOVA
The two-way ANOVA analysis initially begins by stating the null hypothesis that there is an interaction effect between the two factors of a dataset. This effect can be visualized using line segments formed by joining the means for...

