Author(s)

Johan H. Cronje^1,2*, Elizabeth M. Green^1,2, Louise A. Stroud^1,2

¹Department of Psychology, Nelson Mandela University, Gqeberha, South Africa.
²Association for Research in Infant and Child Development, Birmingham, UK.

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.

Griffiths III, Child Development, Test-Retest Reliability, Inter-Rater Reliability

Cronje, J. , Green, E. and Stroud, L. (2022) Stability Reliability of the Griffiths Scales of Child Development (3rd Edition). Psychology, 13, 353-360. doi: 10.4236/psych.2022.133022.