The idea that one single entity would be in the origin of all the elements included in the construct of intelligence came from the fact that there is a certain stability in the performance of seemingly unrelated cognitive tasks (Spearman, 1904), an early finding that has proven robust over the years (Kovacs & Conway, 2019). Spearman (1904) proposed that a dominant general factor or G would be the cause for the strong correlations between results in different intelligence tests.
Because intelligence is such an abstract and multidimensional construct, assessing it directly is impossible. Thus intelligence assessment tests use the behavior of individuals (e.g. their performance in certain cognitive tasks) to infer their level of intelligence (Kranzler & Floyd, 2013; Kovacs & Conway, 2019). The IQ (Intelligence Coefficient) level is, therefore, a computation of the results of tests assessing different cognitive abilities believed to reflect the general factor G.
Over the years, there have been a myriad of models of intelligence that are linked to multiple tests of intelligence, like the Wechsler Adult Intelligence Scale, the Stanford-Binet Scale or Raven Progressive Matrices (Daniel, 1997). Although there is little consensus on the best way to define and assess intelligence, three constructs are prevalent in the literature as central elements of intelligence: deductive and inductive reasoning and memory (especially working memory).
Our approach for assessing IQ focuses on these three elements:
Regardless of all controversies, IQ is strongly related – more so than any other single human variable thus far identified in the scientific literature – to many important educational, occupational, economic, and social outcomes; whatever IQ tests assess, it seems to be of undeniable practical and social significance (Gottfredson, 1997).
Helena Martins is a Researcher and Professor in the area of Human Resources Management. She has trained in the field of Psychology as well as Management and currently lectures in Lisbon, Portugal. Her research and teaching interests are the development of soft skills for crisis and change situations where solid psychological assessment is key as a starting point for efficacious interventions.
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