Abstract
This study empirically evaluates the psychometric properties of a new mother-answered developmental instrument for toddlers, the Toddler Language and Motor Questionnaire (TLMQ). Mothers of 1132 15- to 38-month-old children filled out a 144-item instrument, tapping the toddlers’ competences in five language and motor subtests. Concurrent validity was investigated in an independent sample by administering the McCarthy Scales of Children's Abilities (MSCA) individually to 47 children and the TLMQ to their mothers. A two-factor solution emerged in principal axis factor analyses with a promax rotation, with motor subtests loading high on one of the factors and the language subtests on the other. Toddlers’ genders significantly affected outcome on all of the five subtests. Divergent and convergent correlations emerged between the TLMQ's motor composite and scales of the MSCA. Partially convergent and divergent correlations emerged between the TLMQ's language composite and scales of the MSCA. The findings show that young children's motor and language development can be reliably and validly assessed by using a psychometrically constructed questionnaire completed by mothers.
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