Final Answer:
The WJ-III-COG (Woodcock-Johnson III Tests of Cognitive Abilities) is typically scored using standard scores, which have a mean of 100 and a standard deviation of 15.
Step-by-step explanation:
The standard scoring of the WJ-III-COG involves converting raw scores into standard scores. A standard score of 100 represents the average performance for the test, and each 15 points above or below 100 signifies one standard deviation from the mean. This normalization allows for a comparison of an individual's performance to the broader population. For instance, if a person scores 115, it means their performance is one standard deviation above the average. Conversely, a score of 85 indicates a performance one standard deviation below the mean.
In practical terms, this scoring method facilitates the interpretation of an individual's cognitive abilities by providing a relative measure of their performance compared to a normative sample. The use of standard scores enhances the reliability and validity of the assessment, enabling professionals to make informed decisions regarding interventions or educational accommodations based on a standardized and widely accepted metric.
In summary, the WJ-III-COG is scored by converting raw scores into standard scores, with a mean of 100 and a standard deviation of 15. This standardized approach allows for a meaningful interpretation of cognitive abilities and assists professionals in making informed decisions about an individual's cognitive functioning.