Differential item functioning of the Chinese version of the somatosensory amplification scale among adolescents across grade levels

K. H. Barry TAM, Wing Sze WONG

Research output: Contribution to conferencePapers

Abstract

Introduction: Tam et al. (2011)[1] recently reported the invariance of the one-factor model of the Chinese version of the Somatosensory Amplification Scale (ChSAS). The objective of this paper is to further examine the item-level equivalence of the ChSAS in a sample of Chinese adolescents across grade levels. Methods: The ChSAS was administered to 500 Chinese adolescents. Differential item functioning (DIF) analysis was performed to identify any uniform and non-uniform differences on the 10 ChSAS items among adolescents across different grade levels. Results: After a Bonferroni adjustment of p value (=0.0007, i.e., 0.05/70), results of DIF analyses showed that there is no uniform (all Fs ranging from 0.17–2.15, ps > 0.09) or non-uniform (all Fs ranging from 0.47–1.76, ps > 0.02) difference on the 10 ChSAS items. Conclusions: The four different grade level groups used the scale comparably, without showing any difference on item properties. These findings further substantiate the use of ChSAS as a valid and reliable instrument among adolescents across grade levels. Copyright © 2013 Elsevier Masson SAS.
Original languageEnglish
Publication statusPublished - Apr 2013

Citation

Tam, B. K. H., & Wong, W. S. (2013, April). Differential item functioning of the Chinese version of the somatosensory amplification scale among adolescents across grade levels. Paper presented at the 21st European Congress of Psychiatry (EPA 2013), Acropolis, Nice, France.