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Review

We Can Boost IQ: Revisiting Kvashchev’s Experiment

by 1,* and 2
1
School of Psychology, The University of Sydney, Sydney, NSW 2006, Australia
2
School of Education, The University of NSW, Sydney, NSW 2096, Australia
*
Author to whom correspondence should be addressed.
Received: 17 September 2020 / Revised: 20 November 2020 / Accepted: 24 November 2020 / Published: 26 November 2020
This paper examined the effects of training in creative problem-solving on intelligence. We revisited Stankov’s report on the outcomes of an experiment carried out by R. Kvashchev in former Yugoslavia that reported an IQ increase of seven points, on average, across 28 tests of intelligence. We argue that previous analyses were based on a conservative analytic approach and failed to take into account the reductions in the IQ test variances at the end of the three-years’ training. When standard deviations of the initial test and 2nd retest were pooled in the calculation of the effect sizes, the experimental group’s performance was 10 IQ points higher on average than that of the control group. Further, with the properly defined measures of fluid and crystallized intelligence, the experimental group showed a 15 IQ points higher increase than the control group. We concluded that prolonged intensive training in creative problem-solving can lead to substantial and positive effects on intelligence during late adolescence (ages 18–19). View Full-Text
Keywords: intelligence; training; creative problem-solving intelligence; training; creative problem-solving
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MDPI and ACS Style

Stankov, L.; Lee, J. We Can Boost IQ: Revisiting Kvashchev’s Experiment. J. Intell. 2020, 8, 41. https://doi.org/10.3390/jintelligence8040041

AMA Style

Stankov L, Lee J. We Can Boost IQ: Revisiting Kvashchev’s Experiment. Journal of Intelligence. 2020; 8(4):41. https://doi.org/10.3390/jintelligence8040041

Chicago/Turabian Style

Stankov, Lazar, and Jihyun Lee. 2020. "We Can Boost IQ: Revisiting Kvashchev’s Experiment" Journal of Intelligence 8, no. 4: 41. https://doi.org/10.3390/jintelligence8040041

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