Statistics of COLT — <Cooijmans OnLine Test>

Introduction

This test has now been extended with a second barrel to provide finer resolution; these statistics are of the period before that extension. It should not be assumed that this test is identical to the current first barrel. In this form, the test did not work well at all, as seen below.

Scores on Cooijmans On-Line Test as of 10 February 2023

Contents type: Logical.   Period: 2001-2009

• n: 34
• Median: 6.0
• Quartile deviation: 0.5
• Range: 6
• Maximum possible: ∞
• Male median: 7.0 (n = 28)
• Female median: 6.0 (n = 3)
• Unknown sex median: 4.0 (n = 3)
• Proportion of males among candidates: 0.824
• Hardness: 1.00
• Resolution: 0.14

Correlation of Cooijmans On-Line Test with other mental ability tests

Weighted average of correlations: 0.219 (N = 133, weighted sum = 29)

Estimated g factor loading: 0.47

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 3 score pairs. All known pairs are used, including possible floor/ceiling scores or outliers.

Estimated loadings of Cooijmans On-Line 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.

N = 85

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

Balanced g loading = 0.73

National medians for Cooijmans On-Line 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 Cooijmans On-Line Test

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

• r = 0.16 (n = 23)

Correlation of Cooijmans On-Line Test with personal details

Scores by age

N = 30

Scores by year taken

r_{year taken × median score} = 0.38 (N = 32)

Robustness and overall test quality

• Robustness by month = 0.51 (r_{raw scores × months} = 0.49)
• Quality = 0.512

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