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Evaluating the NIH Toolbox for Cognitive Change in Intellectual Disabilities
Psychological Measurement and Testing

Evaluating the NIH Toolbox for Cognitive Change in Intellectual Disabilities

Shields et al. (2023) examined the effectiveness of the National Institutes of Health Toolbox Cognition Battery (NIHTB-CB) in identifying cognitive development and changes in individuals with intellectual disabilities (ID). The study focused on groups with fragile X syndrome (FXS), Down syndrome (DS), and other forms of intellectual disability (OID), offering …

Evaluating Coefficient Alpha and Alternatives in Non-Normal Data
Statistical Methods and Data Analysis

Evaluating Coefficient Alpha and Alternatives in Non-Normal Data

Leifeng Xiao and Kit-Tai Hau’s article, “Performance of Coefficient Alpha and Its Alternatives: Effects of Different Types of Non-Normality,” examines how coefficient alpha and other reliability indices perform under varying conditions of non-normality. The study offers critical insights into how these measures behave across different data structures, providing useful recommendations …