| Raw scores |
e.g., 25 out of 40
e.g., 75% |
| does not provide much meaningful information regarding
performance |
| |
|
| Developmental scores |
--Age Equivalent |
| e.g. 8-4 |
| indicates performance at a
level typical of a person 8 years and 4 months of age |
|
| -Grade Equivalent |
| e.g. 8.5 |
| indicates performance at a
level typical of a person |
|
| |
|
|
| Average |
Mean +/- one standard deviation |
| Middle 68% of the distribution |
| Scores
of Relative Standing |
z-score-- (Mean of zero and a
standard deviation of 1. Thus 68% of the scores fall between -1 and
+1) |
| Standard Score--(For example: a
mean of 60 and a standard deviation of 10. Thus 68% of the scores
fall between 50 and 70) |
|
|
|
| Standard Score--(With a
mean of 100 and a standard deviation of 15, 68% of the scores
fall between 85 and 115) |
| Percentile-(For example: a mean of
50 and a standard deviation of 34. Thus 68% of the scores fall
between 16 and 84) |
| T-Score- (Mean of 50 and a standard
deviation of 10. Thus 68% of the scores fall between 40 and 60) |
| Stanine- (Stanines of 4, 5, and 6
indicate average performance) |
|
