The ups and downs of intelligence: The co-occurrence model and its associated research program

Jonathan Egeland

Intelligence, 2022, vol. 92, issue C

Abstract: This paper discusses the co-occurrence model and its associated research program, and it argues that the model provides the best supported theory of secular changes in cognitive ability. The co-occurrence model offers a better solution to Cattell's paradox (relative to the alternatives in the literature), and it is able to accommodate Flynn's four major paradoxes also. A review of empirical work conducted in order to test the model's predictions demonstrates that many populations in which selection favors lower intelligence have experienced a decline in g or some cognitive ability variable that correlates with g, at the same time that average phenotypic IQ has increased. Moreover, since the co-occurrence model makes predictions about variables that are not directly concerned with cognitive ability testing, its research program can be extended to other domains of research.

Keywords: Co-occurrence model; Attenuation model; Flynn effect; Woodley effect; g; IQ; Selection (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:intell:v:92:y:2022:i:c:s0160289622000241

DOI: 10.1016/j.intell.2022.101643

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