A Critical Study on the EASI: Factor Structure and Measurement and Structural Invariance between the Parent’s Gender, the Child’s Age and Two Measurement Time Points

Background: The EASI (Emotionality, Movement, Sociability and Impulsivity measurement) is a commonly used instrument to assess the temperament of children. However it has seldom studied its factor function and its calculation and structural invariances. The goal of our analysis is to report the EASI factor structure in a larger population in Japan in search of the model that matches the data adequately as well as the measurement and structural invariance of the final model. Methods: 531 mothers and 369 fathers of 3- to 4-year-old Japanese children gathered data from a net survey. A test-retest sample of 173 mothers and 127 fathers from the first group of participants was conducted. Results: An appropriate fit was shown by the original 4-factor structure (excluding 6 items) with a general factor (influencing E and I). Measurement and structural invariance between fathers and mothers, boys and girls, 3- and 4-year-olds, and times 1 and 2 have also been fulfilled by this model. In terms of the means of certain factor scores, differences arose between mothers and fathers. Conclusion: Our research showed that the factor structure of the EASI was invariant in terms of the gender of parents and children, age of children and opportunities for measurement. This is promising as it encourages the use of EASI in both clinical and research environments. As well as a compo-site score of E and I, we suggest the use of 4 subscale ratings.

Author(s) Details

Yukiko Ohashi
Josai International University, Togane, Chiba, Japan and Kitamura Institute of Mental Health Tokyo, Tokyo, Japan.

Toshinori Kitamura
Kitamura Institute of Mental Health Tokyo, Tokyo, Japan, Kitamura KOKORO Clinic Mental Health, Tokyo, Japan, T. and F. Kitamura Foundation for Studies and Skill Advancement in Mental Health, Tokyo, Japan and Department of Psychiatry, Graduate School of Medicine, Nagoya University, Nagoya, Japan.

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