Statistics of Giga Test

Preliminary norms

Scores on Giga Test

Contents type: Verbal, numerical, working memory capacity, extrasensory perception.   Period: 1997-1999

Based on median and quartile deviation

• n: 5
• Median: 83.0
• Quartile deviation: 13.0
• Range: 70
• Maximum possible: 219
• Male median: 84.0 (n = 4)
• Female median: 83.0 (n = 1)
• Hardness: 0.62
• Resolution: 0.73

Based on mean and standard deviation

• n: 5
• Mean: 83.80
• σ: 23.62
• Range: 70.0
• Maximum possible: 219
• Male mean: 84.00 (n = 4)
• Female mean: 83.00 (n = 1)
• Hardness: 0.62
• Resolution: 0.89

For reasons of privacy, the actual scores are not revealed for this small sample.

Correlation of Giga Test with other tests by Paul Cooijmans

Weighted average of correlations: 0.978

Conservatively estimated minimum g loading: 0.99

Ranking in above table is based on the unrounded correlations. All available data is present in this table, no tests are left out except for those with less than 2 score pairs. All known pairs are used to obtain the true, honest statistics; correlations have not been artificially inflated by leaving out ceiling scores, outliers or other anomalies.

Correlation of Giga Test with tests by others

Weighted average of correlations: 1.000

Ranking in above table is based on the unrounded correlations. All available data is present in this table, no tests are left out except for those with less than 2 score pairs. All known pairs are used to obtain the true, honest statistics; correlations have not been artificially inflated by leaving out ceiling scores, outliers or other anomalies.

Please be aware that correlations with these external tests are in most cases affected (depressed, typically) by one or more of the following: 1) Little overlap with the object test because of the much lower ceilings and inherent ceiling effects of the tests used in regular psychology; 2) Candidates reporting scores selectively, for instance only the higher ones while withholding lower ones; 3) Candidates reporting, or having been reported by psychometricians, incorrect scores.

National means for Giga Test

For reasons of privacy, only countries with 2 or more candidates are included in this table. Ranking is based on the unrounded means, and then alphabetic.

Correlation of Giga Test with personal details

Correlation with national I.Q.s of Giga Test

Correlation of this test with national average I.Q.s published by Lynn and Vanhanen:

• r = 0.18 (n = 5)

Overall test quality

Quality = 0.82