Gifted Adult's Inventory of Aspergerisms (GAIA) - Statistical Report

Introduction

This is the statistical report of a personality inventory relating to Aspergoid features in intelligent adults.

Scores on Gifted Adult's Inventory of Aspergerisms as of 15 February 2025

Contents type: Personal information, observation, or non-cognitive personality test score in numeric form.   Period: 2000-present

• n: 211
• Median: 25.0
• Quartile deviation: 9.0
• Maximum possible: 54
• Male median: 24.0 (n = 164)
• Female median: 29.0 (n = 44)
• Unknown sex median: 39.0 (n = 3)
• Proportion of males among candidates: 0.777
• Hardness: 0.54
• Resolution: 9.0

Scores by males

n = 164

Scores by females

n = 44

Correlation of Gifted Adult's Inventory of Aspergerisms with other mental ability tests

Weighted mean of correlations: -0.108 (N = 1444)

Estimated g factor loading: -0.33

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 low negative g loading of indicators of deviance and disorder has been observed consistently since the early 2000s.

Estimated loadings of Gifted Adult's Inventory of Aspergerisms 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 = 1033

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

Balanced g loading = -0.35

National medians for Gifted Adult's Inventory of Aspergerisms

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 Gifted Adult's Inventory of Aspergerisms with personal details

Remark: The correlation with disorders is ultimately the validity of this test.

Correlation with personal details of Gifted Adult's Inventory of Aspergerisms - within females

Correlation with personal details of Gifted Adult's Inventory of Aspergerisms - within males

Estimated g factor loadings for restricted ranges

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 these values to be lower than the test's full-range g loading.

Notice: The g loading is positive below the median and becomes negative above, suggesting that the negative correlation of deviance and disorder with intelligence occurs where deviance is high; that it is the more serious levels of disorder that depress intelligence.

Remark on internal statistics

The below statistics are based on a smaller sample (n = 60) from the year 2009, for which the internal data (item scores) were recorded. Recently, GAIA has commenced recording internal data again.

Reliability analysis for Gifted Adult's Inventory of Aspergerisms

• Split-half (odd-even) = 0.89
• Split-half (1, 2… 5, 6… vs. 3, 4… 7, 8…) = 0.90
• Cronbach's alpha = 0.87

Remark: This reliability is remarkably high for a non-cognitive personality test.

Error

• Standard error = 3.1 raw score points

Scores by age for Gifted Adult's Inventory of Aspergerisms

N = 58

Scores by age for Gifted Adult's Inventory of Aspergerisms - within females

N = 17

Scores by age for Gifted Adult's Inventory of Aspergerisms - within males

N = 41

Scores by year taken for Gifted Adult's Inventory of Aspergerisms

N = 60

Robustness for Gifted Adult's Inventory of Aspergerisms

• Robustness (score trend by time measured in months) = r_{raw scores × months} = 0.03 (n = 60)

Item analysis for Gifted Adult's Inventory of Aspergerisms

r = point-biserial correlation of that item with the combined score over the rest of the items.

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