Construct Validity Assessment: Convergent Type for Stanford Binet and Wechsler Intelligence Scale for Children in Tehran

Abstract

Among the subset of construct validity is convergent validity which explore the relations hips between two instruments that claim same construct assessment. This study aimed to assess the concurrent validity of the Fourth Edition of Wechsler Intelligence Scale for Children and Fifth Edition of Stanford-Binet Intelligence Scale. The study s ample cons is ted of 91 primary school students in the first to fifth grade which is 6-11 years old and selected thourgh convenience sampling method. The Fourth Edition of Wechsler Intelligence Scale for Children and Fifth Edition of Stanford-Binet Intelligence Scale have been used in this study. Data analysis have been done with emphasis on CHC theory as the same theoretical foundation of both instruments. The study results shown that there are significant relationship between FSIQ, working memory, perceptual reasoning, and fluid reasoning scores as the factors with similar theoretical foundation. Also, there are not any significant relationship between knowledge and verbal comprehension despite their similar underlying theoretical foundation. In addition, processing speed, as a factor that as sess different ability according to CHC theory, had no significant relations hip with any of the factors and IQs in the SB5.