Answers are grounded in this paper and cite their sources.
The test-retest reliability and inter-rater reliability of the Griffiths III were investigated using a sample of 53 children in the United Kingdom and the Republic of Ireland. Correlations indicated very high reliability of the scales over a two- to four-week period (.969 to .991), as well as between raters (.967 to .996). Variations in mean scores were observed for the Gross Motor subscale, which is consistent with literature on intra-individual differences in this domain. It is recommended that the study be repeated on larger samples, at more extended testing intervals, and on samples from different countries.
No takes yet. Share an insight, caveat, or question.
Cronje et al. (2022) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: