Name of score What the score means
Raw score This is a simple count of the number of items for which the child has supplied correct answers.
It is of little use in reporting on a child’s performance.
Standard score Standard scores are transformations of raw scores, and usually range between 55 and 145, with an average of 100.
Percentile rank The percentile rank indicates the percentage of the relevant class or age group which has scored equal to
or lower than this child’s score. It does not mean the percentage of test items the child answered correctly.
STen score STen scores are a ten-point scale with 1 representing the lowest category and 10 the highest.
These are derived from standard scores. (See Table 3, p. 63 for descriptors for explaining STen scores.)