The dimensionality of the Edinburgh Handedness Inventory: An analysis with models of the item response theory

摘要: Handedness is frequently measured with sum scores or quotients taken from laterality questionnaires like the Edinburgh Inventory (EHI). In classical test theory such data cannot be used to confirm either unidimensionality (i.e., quantitative differentiation poles left-handed and right-handed) multidimensionality typological between left-, right-, mixed-handers) of this personal characteristic. This study uses item response models construct validity EHI on an level in order gather empirical support for handedness as well appropriateness items format. The was given 540 participants (303 male 237 female) aged 17-37 years. Results mixed-Rasch analyses revealed that best model a two-class solution; is, left- right-handers (types) differences persons. Hence, unlike earlier tests, rejects both need consider so-called mixed-handers. It proposed should applied more other extensive questionnaires.