HVGIQ: The Bahamas

The Bahamas is one of the most prosperous nations in the world (Third highest GDP per capita in the Americas, behind the US and Canada), with an economy, much like the Cayman Islands, primarily dependent upon tourism and finance. The population, not much larger than 350,000, is 85% black, 12% white, and 3% Asian and Latin American.

IQ and the Wealth of Nations (2002) does not have a study for The Bahamas, but estimates an IQ of 78 by using the score from Barbados (p. 74). IQ and Global Inequality (2006) estimates an IQ of 84 by averaging the scores from Cuba and the Dominican Republic (p. 55), and this is the estimate still reported in the most recent book (Lynn & Vanhanen, 2012, p. 20).

Here I discuss measured IQ data for The Bahamas from two different studies.

Pandora Johnson organized a large and representative sample of Bahamian secondary school children in 1987 (Johnson, 1988 ). Johnson collected data for 2nd and 3rd year students from 20 of the 36 high schools in the nation. In all, 694 adolescents were given the Otis-Lennon School Ability Test.

The average IQ of the 20 different high schools was 95 (p 72). The scores were converted on test norms from 1979, requiring a -2 point adjustment for 8 years of norm inflation. This gives us an IQ of 93 for The Bahamas.

Data is not reported by race, and, in fact, the author asserts upfront that “social background” is a much more probable correlate of disadvantage in the Bahamas than ethnicity (p 10); suggesting the author either does not believe there are significant racial inequalities in The Bahamas, or that she believes any such gaps are incidental.

Johnson’s only other mention of race in this 300+ page report is to note how the highest performing school in the sample, Kirklyn Academy, is also overwhelmingly white: “For the most part … the population of the school is white and the children come from wealthier homes.” (p. 145) and “With the exception of one person, the teaching staff is white. The only nonwhite personnel in the high school seem to be the support and maintenance staffs.” (p. 147).

Johnson & Holmes (1995 ) further note that the 75th percentile of Otis scores in this sample is 101, and report a rather narrow standard deviation of 9. The correlation between IQ and school GCE exam performance is reported as .62, while the correlation between IQ and average school socioeconomic status is .63 (p. 44).

A second, and considerably smaller study finds a lower IQ for The Bahamas. Judith Tynes-Jones (2005 ) collected Wechsler Intelligence Scale for Children data for 29 Bahamian children, ages 6-16, in 1999. The average IQ from the three WISC sub-tests administered by Tynes-Jones is 83. Since the reported standard scores were calculated on norms from 1991, this requires a -2 point adjustment, giving us an IQ of 81.

A weighted average of Johnson (1988) and Tynes-Jones (2005) gives us an IQ of 93 for The Bahamas.

Table I: IQ test scores in The Bahamas

Admin Sample Age N Test IQ Reference
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1987 A 16-18 694 Otis 93 Johnson, 1988
_
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1999 A 6-16 29 WISC 81 Tynes-Jones, 2005
_
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REFERENCES

Johnson, P. (1988). Effective secondary schooling: factors affecting academic achievement in the Commonwealth of The Bahamas. Unpublished doctoral dissertation, University of Toronto, Canada.

Johnson, P., & Holmes, M. (1995). School effectiveness in The Bahamas. College Forum, 7, 29-47.

Lynn, R., & Vanhanen, T. (2002). IQ and the Wealth of Nations. Westport, USA: Praeger.

Lynn, R., & Vanhanen, T. (2006). IQ and Global Inequality. Augusta, USA: Washington Summit Publishers.

Lynn, R., & Vanhanen, T. (2012). Intelligence: A Unifying Construct for the Social Sciences. London, UK: Ulster Institute for Social Research.

Tynes-Jones, J. (2005). Applying the Bio-Ecological model of intelligence to the Wechsler Scales in The Bahamas. College of the Bahamas Research Journal, 13, 68-80.

5 thoughts on “HVGIQ: The Bahamas

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  2. According to another, perhaps more reliable, source (derived from the 2010 census), the demographics of the Bahamas are as below:

    “black 90.6%, white 4.7%, black and white 2.1%, other 1.9%, unspecified 0.7% (2010 est.)”
    “African (90.6%), or mixed African with other races (2.7%). 4.7% of the population is European, 0.4% Asian and 0.2% East Indian.”
    http://www.indexmundi.com/the_bahamas/demographics_profile.html

    The “neither black nor white” (roughly) 2% is made up of (Afro-European) mixed race people, but the Asians are a much smaller percent.

    (The 15% white figure is also seen in a wikipedia article, but the citation for the claim traces to a dead link.)

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