This review paper attempts to critically discuss the relationship between high IQ scores and positive life outcomes with reference to research findings. Particularly, three major questions are examined in detail, i.e. 1) How significant is the correlation between IQ scores and socioeconomic success? 2) Does the predictive power of IQ scores outperform other variables such as parental socioeconomic status or school grades? 3) Are there any age-related or historical changes in the relationship between IQ scores and socioeconomic success? It is found that although researchers find some consensus in their empirical findings, yet they disagree strongly about others, too. This may be attributed to the fact that well-controlled experiments in intelligence research are usually not possible and thus conclusions are based upon mere correlations or the results of necessarily ill-controlled natural experiments. Accordingly, not all conclusions are fully supported by the evidence and generally accepted by the research community. To resolve the controversy, perhaps improving the research methodology and skills is of top priority.
KeywordsHigh IQ ScoresIntelligencePositive Life OutcomesSocioeconomic Success
Aguilera, M. B. (2002). The Impact of Social Capital on Labor Force Participation: Evidence from 2000 Social Capital Benchmark Survey. Social Science Quarterly, 83, 853-874. https://doi.org/10.1111/1540-6237.00118
Bergman, L. R., Ferrer-Wreder, L., & Zukauskiene, R. (2015). Career Outcomes of Adolescents with Below Average IQ: Who Succeeded against the Odds? Intelligence, 52, 9-17.
Bond, R., & Saunders, P. (1999). Routes of Success: Influences on the Occupational Attainment of Young British Males. British Journal of Sociology, 50, 217-252. https://doi.org/10.1111/j.1468-4446.1999.00217.x
Bowles, S., & Gintis, H. (1976). Schooling in Capitalist America: Educational Reform and the Contradictions of Economic Life. London: Routledge and Paul Kegan.
Bowles, S., Gintis, H., & Osborne, M. (2001). The Determinants of Earnings: A Behavioral Approach. Journal of Economic Literature, 39, 1137-1176. https://doi.org/10.1257/jel.39.4.1137
Breen, R., & Goldthorpe, J. H. (1999). Class Inequality and Meritocracy: A Critique of Saunders and an Alternative Analysis. British Journal of Sociology, 50, 1-27. https://doi.org/10.1111/j.1468-4446.1999.00001.x
Breen, R., & Goldthorpe, J. H. (2001). Class, Mobility and Merit: The Experience of Two British Birth Cohorts. European Sociological Review, 17, 81-101. https://doi.org/10.1093/esr/17.2.81
Byington, E., & Felps, W. (2010). Why Do IQ Scores Predict Job Performance? An Alternative, Sociological Explanation. Research in Organizational Behavior, 30, 175-202.
Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Mahwah, NJ: Lawrence Erlbaum Associates.
Fisher, C. S., Hout, M., Jankowski, M. S., Lucas, S. R., Swidler, A., & Voss, K. (1996). Inequality by Design: Cracking the Bell Curve Myth. Princeton, NJ: Princeton University Press.
Ganzach, Y. (2011). A Dynamic Analysis of the Effects of Intelligence and Socioeconomic Background on Job-Market Success. Intelligence, 39, 120-129.
Gottfredson, L. S. (2003). G, Jobs and Life. In H. Nyborg (Ed.), The Scientific Study of General Intelligence: Tribute to Arthur R. Jensen (pp. 293-342). Amsterdam: Pergamon.
Gottfredson, L. S. (2004). Intelligence: Is It the Epidemiologists’ Elusive “Fundamental Cause” of Social Class Inequalities in Health? Journal of Personality and Social Psychology, 86, 174-199. https://doi.org/10.1037/0022-3514.86.1.174
Grieco, M. (1987). Keeping it in the Family: Social Networks and Employment Chance. London: Tavistock Publications.
Hauser, R. M., & Huang, M. H. (1997). Verbal Ability and Socioeconomic Success: A Trend Analysis. Social Science Research, 26, 331-376. https://doi.org/10.1006/ssre.1997.0604
Herrnstein, R. J., & Murray, C. (1994).The Bell Curve: Intelligence and Class Structure in American Life. New York, NJ: Free Press.
Hogan, R. (2005). In Defense of Personality Measurement: New Wine for Old Whiners. Human Performance, 18, 331-341. https://doi.org/10.1207/s15327043hup1804_1
Jensen, A. R. (1998). The G Factor: The Science of Mental Ability. Westport, CT: Praeger/Greenwood.
Judge, T. A., Colbert, A. E., & Ilies, R. (2004). Intelligence and Leadership: A Quantitative Review and Test of Theoretical Propositions. Journal of Applied Psychology, 89, 542-552. https://doi.org/10.1037/0021-9010.89.3.542
McClelland, D. C. (1973). Testing for Competence Rather than for Intelligence. American Psychologist, 28, 1-14. https://doi.org/10.1037/h0034092
McCormick, E. J., DeNisi, A. S., & Shaw, J. B. (1979). Use of the Position Analysis Questionnaire for Establishing the Job Component Validity of Tests. Journal of Applied Psychology, 64, 51-56. https://doi.org/10.1037/0021-9010.64.1.51
McCormick, E. J., Jeanneret, P. R., & Mecham, R. C. (1972). A Study of Job Characteristics and Job Dimensions as Based on the Position Analysis Questionnaire (PAQ). Journal of Applied Psychology, 56, 347-368. https://doi.org/10.1037/h0033099
Neisser, U., Boodoo, G., Bouchard Jr., T. J., Boykin, A. W., Brody, N., Ceci, S. J., Halpern, D. F., Loehlin, J. C., Perloff, R., Sternberg, R. J., & Urbina, S. (1996). Intelligence: Knowns and Unknowns. American Psychologist, 51, 77-101. https://doi.org/10.1037/0003-066X.51.2.77
Ng, T. W. H., Eby, L. T., Sorensen, K. L., & Feldman, D. C. (2005). Predictors of Objective and Subjective Career Success: A Meta-Analysis. Personnel Psychology, 58, 367-408. https://doi.org/10.1111/j.1744-6570.2005.00515.x
Roberts, B. W., Kuncel, N. R., Shiner, R., Caspi, A., & Goldberg, L. R. (2007). The Power of Personality: The Comparative Validity of Personality Traits, Socioeconomic Status, and Cognitive Ability for Predicting Important Life Outcomes. Perspectives on Psychological Science, 2, 313-345. https://doi.org/10.1111/j.1745-6916.2007.00047.x
Saunders, P. (1997). Social Mobility in Britain: An Empirical Evaluation of Two Competing Explanations. Sociology, 31, 261-288. https://doi.org/10.1177/0038038597031002005
Saunders, P. (2002). Reflections on the Meritocracy Debate in Britain: A Response to Richard Breen and John Goldthorpe. British Journal of Sociology, 53, 559-574. https://doi.org/10.1080/0007131022000021489
Sorjonen, K., Hemmingsson, T., Deary, I. J., &Melin, B. (2015). Mediation of the Gravitational Influence of Intelligence on Socio-Economic Outcomes. Intelligence, 53, 8-15.
Sternberg, R. J., Grigorenko, E. L., & Bundy, D. A. (2001). The Predictive Value of IQ. Merrill-Palmer Quarterly, 47, 1-141. https://doi.org/10.1353/mpq.2001.0005
Strenze, T. (2007). Intelligence and Socioeconomic Success: A Meta-Analytic Review of Longitudinal Research. Intelligence, 35, 401-426.
Von Stumm, S., Macintyre, S., Batty, D. G., Clark, H., & Deary, I. J. (2010). Intelligence, Social Class of Origin, Childhood Behavior Disturbance and Education as Predictors of Status Attainment in Midlife in Men: The Aberdeen Children of the 1950s Study. Intelligence, 38, 202-211.
Von Stumm, S., & Plomin, R. (2015). Socioeconomic Status and the Growth of Intelligence from Infancy through Adolescence. Intelligence, 48, 30-36.