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The purpose of this study was to test the construct validity using factor analysis on the assessment instrument early childhood language development. This research was conducted with models of Research and Development with twice tried. The first test performed on 80 early childhoods and the second trial conducted on 160 children younger children in Karanganyar, Central Java Indonesia. In the first attempt succeeded factor analysis extracted seven factors, which corresponds to the number of factors that are estimated in accordance with the theoretical study, and none of the items that pass the "cut off point" <0.30. Obtained internal consistency reliability coefficient alpha of 0.950. Likewise, the second trial successfully extracted 7 factors in accordance with the theoretical study and none of the items that pass the "cut off point" <0.30 and obtained internal reliability coefficient alpha of 0.936. It can be concluded that the instrument assessment early childhood language development is developed has good construct validity and internal consistency reliability coefficient is very high. Keywords—validity; analysis; factors; instruments

Construct Validity Testing Using Factor Analysis on Language Development Assessment Instruments of Early Childhood Utsman