Objective:The aim of this study was to examine the psychometric properties of the Early Childhood Behavior Questionnaire (ECBQ), including internal consistency, content validity, construct validity, cross validity, and concurrent validity with Buss and Plomin's Emotionality-Activity-Sociability (EAS) scale. Methods: The ECBQ is a caregiver-report measure designed to provide a detailed assessment of temperament in toddlers (age 13-36 months). Two groups of participants were included to check cross validity. The first group of participants included 111 toddlers and their mothers. The second group of participants included 90 toddlers and their mothers. Results: First, the ECBQ subscales demonstrated adequate internal consistency. Second, exploratory and confirmatory factor analyses of the ECBQ scale reliably resulted in a three-factor solution, indicating three broad dimensions of temperament: extraversion/surgency, negative affectivity, and effortful control. Third, the concurrent validity of the ECBQ correlated with the EAS scale. Conclusion: The ECBQ is a reliable and valid temperament instrument for toddlers and is recommended for evaluating temperament in toddlers.

Objective: This study aimed to review scales and tests developed for or validated with children and their families that were published in the Korean Journal of Child Studies from 1984 to 2016. Specifically, the purpose of the present study was to analyze the contents and format of the selected instruments, as well as to evaluate their psychometric properties. Methods: Using several databases and journal archives from the Korean Journal of Child Studies, searches were implemented using the key terms: instrument, scale, development, and validation. Instruments from 76 selected studies were reviewed based on several characteristics, such as assessment areas, contents, respondents, responding types, and psychometric properties. Results and Conclusion: First, a majority of the reviewed instruments were developed for infants and children, whereas only one was developed for adolescents. With regard to their specific measurement domains, many instruments focused on social emotional development among children. Second, with a few exceptions, the selected studies provided appropriate evidence for the reliability of the instrument, including its internal consistency, inter-rater reliability, and spilthalf reliability. Many studies also reported on the criterion-related or construct validity of the instrument to establish its validity. Future studies need to develop instruments across diverse developmental areas that collect information from multiple sources and raters. In addition, more evidence on the reliability and validity of the reviewed instruments should be provided to demonstrate their psychometric qualities.