Originally Posted by notnafnaf
2 years? I thought it was just 1 year, or is that 1 year restriction only for the WPPSI?
It's two years for repeating any cognitive measure. (Years ago, it was one year, but research has found that re-test effects are still noticeable at one year.) But if you have the WPPSI at age 5, there's no restriction on having the WISC a year later.

...pronounced like the long vowel and first letter of the alphabet...