Because Christopher Harding has never publicly released the complete, exact score-to-IQ norming tables for the W-87 (Skyscraper) test,
there is no public, official chart showing exactly what a raw score of 62 translates to. [
1]
However, looking at historical data and high-IQ society guidelines, we can infer how a high raw score like 62 behaves under psychometric norming:
1. Contextualizing a Raw Score of 62
The W-87 test consists of roughly 100 highly complex problems (or variations of matrices and verbal puzzles). On high-range tests, the difficulty increases exponentially.
- A raw score of 62 represents roughly 62% correct answers.
- Unlike standard school tests where 62% is a mediocre grade, getting 62% correct on an un-timed, high-range test like the W-87 is an exceptionally high performance.
2. General High-Range Equivalencies
While exact mappings are proprietary, high-range tests like the W-87 usually scale according to these general psychometric patterns:
- The Threshold Zone (IQ 130–140): Solved by getting roughly 20% to 35% of the questions correct.
- The High-IQ Society Admission Zone (IQ 145–160): Typically achieved by getting roughly 45% to 60% of the questions correct. This is the minimum requirement for highly selective groups like the QIQ Society or ISPE (International Society for Philosophical Enquiry).
- The Genius/Profound Zone (IQ 160–175+): Typically triggered by scores climbing past 60–70% correct. [1]
3. What Happens to a 62?
Given that admission into elite groups like the ISPE—which historically accepted the W-87—requires a score corresponding to the 99.9th percentile (IQ 146, SD 15), a raw score of 62 is universally considered a
qualifying high-range score. [
1]
Because of the steep curve, a raw score of 62 likely places the test-taker somewhere in the
IQ 150 to IQ 165 range (SD 15), firmly within the upper 0.1% to 0.003% of the human population. However, the exact mapping changes slightly depending on the specific cohort norming data used at the time your test is evaluated. [
1]