Chimera High Ability Riddle Test statistics

Old statistical reports

1. First norming, January 1998
2. Second norming, March 1998

• Quality of norms: .50 (sum of correlations of used tests: 63.91)
• Sample-independent hardness: .09

Additional statistics December 2014

Scores on Chimera High Ability Riddle Test

• n: 110
• Median: 57.0
• Quartile deviation: 1.5
• Range: 34
• Maximum possible: 60
• Male median: 57.0 (n = 81)
• Female median: 57.0 (n = 23)
• Hardness: 0.05
• Resolution: 0.25

Scores by males

n = 81

Scores by females

n = 23

Correlation of Chimera High Ability Riddle Test with other tests by Paul Cooijmans

Weighted average of correlations: 0.746

Conservatively estimated minimum g loading: 0.86

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, including possible floor/ceiling scores or outliers.

Correlation of Chimera High Ability Riddle Test with tests by others

Weighted average of correlations: 0.035

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, including possible floor/ceiling scores or outliers.

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.

Estimated loadings of Chimera High Ability Riddle Test on particular item types

These are estimated g factor loadings, but against homogeneous tests (containing only particular item types) as opposed to non-compound heterogeneous tests. Although tending to surprise the lay person, it is not uncommon for tests to have high loadings on item types they do not actually contain themselves. Such loadings reflect the empirical fact that most tests for mental abilities measure primarily g, regardless of their contents; that the major part of test score variance is caused by g, and only a minor part by factors germane to particular item types. It is of key importance to understand that this is a fact of nature, a natural phenomenon, and not something that was built into the tests by the test constructors.

Compound tests have been left out of this table to avoid overlap.

Balanced g loading = 0.84

National medians for Chimera High Ability Riddle Test

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

Correlation with national I.Q.'s of Chimera High Ability Riddle Test

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

• r = 0.17 (n = 19)

Correlation of Chimera High Ability Riddle Test with personal details

Estimated g factor loadings upward and downward of particular scores

In parentheses the number of score pairs on which that estimated g factor loading is based. The goal of this is to verify the hypothesis that g becomes less important, accounts for a smaller proportion of the variance, at higher I.Q. levels. The mere fact of restricting the range like this also depresses the g loading compared to computing it over the test's full range, so it would be normal for both values to be lower than the test's full-range g loading.

Careful study of this table reveals that the test loses its g loading between raw scores 54 and 55. This means that almost all of the candidates have scored in the ceiling (I.Q. 139 when σ = 15), where the test can not distinguish between them, and therefore also explains why the female and male medians are the same.

Overall test quality

• Quality = .51