Reliability
ADD symptoms
The data sample consists of children (N=1162) who were rated by their parents on nine 5-point Likert-scale (0-4) items about attention deficit disorder (ADD) symptoms (Keulers & Hurks, 2021). The ordered response categories, 0, 1, 2, 3, and 4 represent the prevalence of a specific symptomatic behavior, ranging from 0 (never) to 4 (very often). For the ADD scale, a higher sum score indicates more ADHD symptoms. The file demonstrates the use of the score-related standard error of measurement.
ASRM - Mania Scale
Responses of 78 participants to the Altman Self-Rating Mania Scale (ASRM), from Nicolai & Moshagen (2018). The file demonstrates the use of a Bayesian unidimensional reliability analysis
Fear of Statistics
Responses of 2571 students on an SPSS Anxiety Questionnaire.
Fictional data from Andy Field.
Interrater Data from Shrout and Fleiss (1979)
Hypothetical data set from a paper on ICCs by Shrout and Fleiss (1979). The file demonstrates the use of classical intraclass correlation coefficients