Neuropsychological Score Converter

Understanding Score Types: Neuropsychological tests frequently employ different scoring systems—the most common being standard scores (IQ/index; mean = 100, SD = 15) and scaled scores (e.g. WAIS subtests; mean = 10, SD = 3). Broadly, these are alternative ways of describing the same information and can be converted into other formats. This tool helps you convert between systems and visualise where a score falls on the normal distribution.

Scaled scores are commonly used for subtests. Subtests are inherently less reliable than composite scores and have larger measurement error, so very fine-grained outputs (e.g., exact percentiles) can be misleading.

Use caution when converting from less sensitive scales (e.g. scaled scores) to more fine-grained outputs (e.g., percentiles). Reporting ranges (e.g. NZSIGN/APS/AACN) or confidence intervals is often preferable.

Enter any test score (except raw) to see equivalent scores across systems and a location on a normal curve.