Statistics of Daedalus Test

Scores on Daedalus Test as of 3 September 2026

Contents type: Logical.   Period: 1999-present

• n: 59
• Median: 0.0
• Quartile deviation: 103.5
• Maximum possible: 222
• Minimum possible: -1
• Male median: 0.0 (n = 58)
• Proportion of males among candidates: 0.983
• Hardness: 1.00
• Resolution: 103.5

Correlation of Daedalus Test with other mental ability tests

Weighted mean of correlations: 0.368 (N = 1183)

Estimated g factor loading: 0.61

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

Remark: The correlations with other tests, and therewith the g loading, are depressed by the fact that this test, because of its unique nature, effectively works as a single item. Single items have limited reliability (which is why tests normally have several dozens of items at least; the error of individual items is then averaged out and their true score components are piled up) and reliability determines the upper limit of a test's (significant) correlation with any other variable. Reliability and g loading of this test are lower than those of regular I.Q. tests.

As some have pointed out, the reliability and g loading of the test could be raised by letting candidates send in multiple solutions at once, and using only the highest scoring solution among those. However, that would give candidates feedback on the correctness or falseness of the various solutions, and thus endanger the security of the test. The current policy will remain effective therefore: only one solution is allowed, and the possible lower reliability that results from that is to be considered a price paid to keep the test's solutions secret.

Estimated loadings of Daedalus 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 = 891

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

Balanced g loading = 0.57

National medians for Daedalus Test

Total number of countries: 27

For reasons of privacy, only countries with 3 or more candidates are included in this table. Ranking is based on the medians, and then alphabetic.

Correlation of Daedalus Test with personal details

Notice: A correlation is generally considered significant if its p value is 0.05 or less.

Estimated g factor loadings for restricted ranges

The goal of estimated g factor loadings for restricted ranges 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 these values to be lower than the test's full-range g loading.

Reliability

Due to the fact that this test, effectively, consists of only one item, its reliability can not be computed from internal statistics as with multi-item tests. A single item will normally have much lower reliability than a multi-item test. Considering the apparent g loading of the test, the reliability should be at least about .61.

Scores by age for Daedalus Test

N = 59

Scores by year taken for Daedalus Test

N = 59

Robustness and overall test quality for Daedalus Test

• Robustness (score trend by time measured in months) = r_{raw scores × months} = 0.03 (n = 59, p value = 0.78)
• Quality (new method) = 268.9

Item analysis

Effectively, this test has only one item, so that item statistics in the usual sense can not be computed.

[More statistical reports]