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. 2017 May 18;8:806. doi: 10.3389/fpsyg.2017.00806

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Copyright © 2017 Xiao, Liu and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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RMSE-values for estimated standard errors (SEs) of two type of parameter estimates (thresholds and factor loadings of forced-choice items). Each column presents the change tendency of one type of estimated SEs as the percentage of Likert items increases in different conditions.The panels (A–C) correspond to the RMSE for thresholds' SEs as a function of percentage of Likert items in different conditions of three factors. The panels (D–F) correspond to the RMSE for SEs of forced-choice items' loadings as a function of percentage of Likert items in different conditions of three factors.