Why is it necessary to test, retest, and test again? This originally statistics-related concept is called t est-retest reliability, and it refers to the way repeated testing ensures a more ...

This study aimed to test the convergent validity and test–retest reliability of a measure of happiness questionnaire; the authentic happiness inventory questionnaire (AHI), with a convenience sample ...

The primary aim of this study was to evaluate the test-retest reliability of the FAQLQ-CF, -TF and -AF. Methods One hundred and one Dutch patients (31 children, 34 adolescents and 36 adults) completed ...