The WASI-II (Wechsler Abbreviated Scale of Intelligence) is initially scored by converting the test taker’s raw score into a scale score. The scale score represents a common scale that allows for a quantitative comparison between a population of students. From there, the scale score is transformed into a composite score. For example, a composite score on the WASI-II could look like a numerical value of “90-109”. Traditionally, this score represents ‘average” performance. Additionally, on the tester’s scoring sheet, they will also likely see a score labeled percentile ranking (PR). This score demonstrates how the test taker scored against his or her peers. For example, if there is a 70 in this region then the individual will know that they scored better than 70 percent of the other test takers.
Standard Score Ranges for the WASI
The test is based on a mean score of 100 and a standard deviation of 15, with scores typically ranging from 40 to 160. Here are the standard score ranges for the WASI test:
- Extremely Low: < 70 – Individuals in this range demonstrate significantly below-average intellectual functioning. They may face challenges in various aspects of daily life and could require additional support in academic, social, and adaptive functioning.
- Borderline: 70-79 – Individuals with borderline scores exhibit below-average intellectual abilities. They may have difficulties in specific areas of learning or problem-solving and may benefit from targeted interventions and support.
- Low Average: 80-89 – Individuals in the low average range demonstrate slightly below-average intellectual functioning. They may have occasional difficulties in specific cognitive domains but generally can manage day-to-day tasks with some support.
- Average: 90-109 – Individuals in this range have average intellectual abilities. They typically perform adequately in most areas of cognitive functioning and can manage daily life tasks independently.
- High Average: 110-119 – Individuals with high average scores exhibit above-average intellectual functioning. They may demonstrate strengths in specific cognitive domains and often perform well in academic and problem-solving tasks.
- Superior: 120-129 – Individuals in the superior range demonstrate well-above-average intellectual abilities. They often excel in academic, problem-solving, and complex reasoning tasks, and may show a high level of cognitive adaptability.
- Very Superior: 130-139 – Individuals with very superior scores possess significantly above-average intellectual abilities. They often exhibit exceptional problem-solving skills, advanced language abilities, and can grasp complex concepts with ease.
- Exceptionally High: 140-149 – Individuals in this range demonstrate extremely high intellectual functioning. They typically exhibit exceptional abilities in various cognitive domains and may be considered gifted or talented in specific areas.
- Profoundly High: ≥ 150 – Individuals with profoundly high scores have exceptionally rare and outstanding intellectual abilities. They often demonstrate extraordinary problem-solving skills, creativity, and advanced understanding of complex concepts. Such individuals may be classified as prodigies or geniuses in specific fields.
Keep in mind that these ranges are not definitive, and the interpretation of WASI scores may vary depending on the specific version of the test and the context in which it is administered. Always consult with a qualified professional for a comprehensive evaluation and interpretation of test results.
The WASI provides a brief measure of cognitive ability. It can be used to screen for intellectual giftedness, assess cognitive functioning, or to identify learning difficulties.