Test-retest reliability of the YCREATIVE-CRITICALS was conducted in two studies. Chua, Komari,
Amirruddin and Rorlinda (2007) tested 281 students of a teacher training programme and retested the same students
three months later on the YCREATIVE-CRITICALS. The product-moment reliability coefficients were .90 (total
score), .81 (critical thinking style), and .85 (creative thinking style), all of them were at the level of significance p<
.01. The second test was conducted on 23 form sixth students (18 years old) from the Seri Serdang Secondary
School in a range of six months. The product-moment reliability coefficients were .91 (creative thinking style) and
.87 (critical thinking style), both at the level of significance p< .01.