| The aim of this review article was to expose 
	the fundamental problems involved in Yerkes attempts to measure intelligence 
	during the First World War. Robert 
	Yerkes was a psychologist and in 1915 mental testing did not enjoy much 
	credibility, so Yerkes tried to change this.  Yerkes was concerned to 
	establish psychology as a ‘hard’ science and believed that using such 
	a ‘scientific’ approach to mental testing looked a promising route to 
	achieve this.  He believed that intelligence testing should be as rigorous 
	as any other science and he equated science with number and quantification 
	 During the First World War (1914-18) 
	Yerkes found an opportunity to promote the use and status of mental testing 
	and therefore the status of psychology as a serious science.   The American 
	military gave Yerkes permission to carry out mental tests to over 1.75 
	million army recruits.   In 1917, Yerkes devised three types of 
	mental tests: Army Alpha - A written test for literate 
	recruits. The Alpha test had eight parts, such as analogies, filling in the 
	missing number, and unscrambling a sentence.   These types of tests have now 
	become common in modern IQ tests. Army Beta - A pictorial test for men who 
	were illiterate or who failed the alpha.  The Beta test had seven parts 
	including running a maze, number work and the picture completion task. Individual Examination - An individual 
	spoken test for men who failed the Beta The Alpha and Beta tests could be 
	administered to large groups and took less than an hour to complete.  Yerkes argued that his tests measured 
	‘native intellectual ability’, in other words, innate intelligence which was 
	unaffected by culture and educational opportunities.  Yerkes identified three ‘facts’ 
	which were discovered from the intelligence testing. 
		
		The average mental age of White American adults was 13.  The score 
		of 13 was at the top of the category of ‘moronity’.   That is why the 
		title of the article is ‘A Nation of Morons’, because the ‘data’ 
		showed that the USA was just that.  Terman had previously set the 
		standard at 16.
		It was possible to grade European immigrants by their country of 
		origin.  The average man of many countries was a moron, with the fair 
		people of Northern and Western Europe scoring higher than the Slavs of 
		Eastern Europe and the darker people of Southern Europe. (The average 
		Russian had a mental age of 11.34; the Italian, 11.01; the Pole, 10.74). 3.     
	The average score of Black men was 
	10.4, which was considerably below the White average.   These 
	findings were used to support the idea of genetic differences between 
	‘races’.  Carl Brigham, one of Yerkes’ colleagues, using a genetic 
	explanation of the data proposed the racial superiority of the Nordic people 
	(from Northern Europe).  Similarly it was argued that the average 
	scores from the different national groups reflected innate racial 
	differences.  Based on these ‘facts’, and lobbying from 
	scientists who supported the eugenics argument, the Immigration Restriction 
	Act (1924) was passed by the US Congress.   The Act set immigration quotas 
	based on the US population in 1890 (over 30 years prior to the Act). This 
	year was used as the benchmark because immigration from Southern and Eastern 
	Europe had been relatively low before this date. During the next 20 years, conditions 
	deteriorated dramatically in Europe for Slavs and Jews as the Nazi 
	governments enacted policies of ‘racial purity’ culminating in genocide.  
	Estimates suggest that the immigration quotas barred up to six million 
	people from Europe, a number with great significance in the history of 
	Europe. Gould identified many problems with the 
	mass intelligence testing. In particular he pointed to the cultural bias in 
	the tests.  The Beta test required a high level of 
	cultural and educational knowledge to be completed successfully.  For 
	example, recent immigrants would have to be familiar with phonograms, tennis 
	courts and light bulbs. 
	 There were also a number of problems in 
	the administration of the tests. In particular, many who were illiterate in 
	English were still allocated to the Alpha test and so scored zero or near to 
	zero. Because Yerkes had overestimated the level of literacy the queues for 
	the Beta test became very long, leading to the inappropriate re-allocation 
	of men to the Alpha test. Failures on the Alpha tests were often not 
	recalled to take the Beta test. Therefore, recent immigrants who had a poor 
	grasp of English, and Black men who had not been given much, if any, formal 
	education, were unable to score on the Alpha test. Another problem was that even the Beta 
	test required the use of pencil and the writing of numbers, and many men had 
	never even seen or used a pencil before. Conditions in which the tests were taken 
	were also unsatisfactory.  For example, the time allowed was insufficient 
	and an air of panic surrounded the whole procedure. To men unused to the 
	written word or number, the event must have been extremely bewildering. Gould argues that with such problems, the 
	data should be looked at with considerably scepticism. Gould clearly exposes in his review some 
	of the ridiculous and racist explanations put forward by Yerkes and his 
	colleagues.
	 Gould’s article highlights the scientific 
	racism, (i.e. the use of bogus scientific arguments to oppress another 
	group) in the arguments made by Yerkes and uncovered some of the awful 
	consequences of this racism. 
   |