Psychometrics

Different norming methods provide different precision levels norm estimates, under different conditions of particular sample size, violations of normality and homoscedasticity. The quality of the norms was estimated with multiple indexes such as …

1 WHAT IS PARALLEL ANALYSIS 2 METHODOLOGY 3 PARALLEL ANALYSIS IN R Recently, my colleague asked me to review a state assessment tech report. In the tech report, a section-“Parallel Analysis” really caught my eyes. I have done parallel analysis multiple times in the past. However, I have never thought about this topic in a systematical way. It is always a good memory refreshing opportunity. Therefore, I take this tech report reviewing opportunity to dig down the parallel analysis.

This study investigated the factorial invariance of the Wechsler Intelligence Scale for Children-Fifth Edition (WISC-V) between samples of male and female children. A higher-order 5-factor model was tested on a nationally-representative sample of …