Case When Analytical Techniques Invalidate the Conclusions of Data Mining: Reversed Flynn Effect of Decreasing IQ Test Scores

Acosta, Griselda; Smith, Eric; Kreinovich, Vladik

doi:10.1007/978-3-030-46413-4_10

Cited by 1 publication

(1 citation statement)

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“…As seen in our results, other procedures still may be needed to control differences in IQ across sites. Specifically, we found that associations between education and IQ (FSIQ, VIQ) varied by site such that higher levels of education were positively associated with IQ at every site except the United States, indicating site-specific associations (Teasdale and Owen, 2005;Dutton et al, 2016;Bratsberg and Rogeberg, 2018;Acosta et al, 2019) between education and IQ measures that could not be controlled by prospective harmonization. There are several possible interpretations for our finding of a site by education interaction effect.…”

Section: Discussionmentioning

confidence: 89%

Assessing harmonized intelligence measures in a multinational study

DeSerisy,

Wall,

Goldberg

et al. 2024

Camb. prisms Glob. ment. health

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Studies examining the neurocognitive and circuit-based etiology of psychiatric illness are moving toward inclusive, global designs. A potential confounding effect of these associations is general intelligence; however, an internationally validated, harmonized intelligence quotient (IQ) measure is not available. We describe the procedures used to measure IQ across a five-site, multinational study and demonstrate the harmonized measure’s cross-site validity. Culturally appropriate intelligence measures were selected: four short-form Wechsler intelligence tests (Brazil, Netherlands, South Africa, United States) and the Binet Kamat (India). Analyses included IQ scores from 255 healthy participants (age 18–50; 42% male). Regression analyses tested between-site differences in IQ scores, as well as expected associations with sociodemographic factors (sex, socioeconomic status, education) to assess validity. Harmonization (e.g., a priori selection of tests) yielded the compatibility of IQ measures. Higher IQ was associated with higher socioeconomic status, suggesting good convergent validity. No association was found between sex and IQ at any site, suggesting good discriminant validity. Associations between higher IQ and higher years of education were found at all sites except the United States. Harmonized IQ scores provide a measure of IQ with evidence of good validity that can be used in neurocognitive and circuit-based studies to control for intelligence across global sites.

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Section: Discussionmentioning

confidence: 89%