Improving fluid intelligence with training on working memory. Jaeggi, S. M., Buschkuehl, M., Jonides, J., & Perrig, W. J. Proc Natl Acad Sci U S A, 105(19):6829-6833, 2008.
doi  abstract   bibtex   
Fluid intelligence (Gf) refers to the ability to reason and to solve new problems independently of previously acquired knowledge. Gf is critical for a wide variety of cognitive tasks, and it is considered one of the most important factors in learning. Moreover, Gf is closely related to professional and educational success, especially in complex and demanding environments. Although performance on tests of Gf can be improved through direct practice on the tests themselves, there is no evidence that training on any other regimen yields increased Gf in adults. Furthermore, there is a long history of research into cognitive training showing that, although performance on trained tasks can increase dramatically, transfer of this learning to other tasks remains poor. Here, we present evidence for transfer from training on a demanding working memory task to measures of Gf. This transfer results even though the trained task is entirely different from the intelligence test itself. Furthermore, we demonstrate that the extent of gain in intelligence critically depends on the amount of training: the more training, the more improvement in Gf. That is, the training effect is dosage-dependent. Thus, in contrast to many previous studies, we conclude that it is possible to improve Gf without practicing the testing tasks themselves, opening a wide range of applications.
@ARTICLE{Jaeggi2008,
  author = {Jaeggi, Susanne M. and Buschkuehl, Martin and Jonides, John and Perrig,
	Walter J.},
  title = {{Improving fluid intelligence with training on working memory}},
  journal = {Proc Natl Acad Sci U S A},
  year = {2008},
  volume = {105},
  pages = {6829-6833},
  number = {19},
  abstract = {Fluid intelligence (Gf) refers to the ability to reason and to solve
	new problems independently of previously acquired knowledge. Gf is
	critical for a wide variety of cognitive tasks, and it is considered
	one of the most important factors in learning. Moreover, Gf is closely
	related to professional and educational success, especially in complex
	and demanding environments. Although performance on tests of Gf can
	be improved through direct practice on the tests themselves, there
	is no evidence that training on any other regimen yields increased
	Gf in adults. Furthermore, there is a long history of research into
	cognitive training showing that, although performance on trained
	tasks can increase dramatically, transfer of this learning to other
	tasks remains poor. Here, we present evidence for transfer from training
	on a demanding working memory task to measures of Gf. This transfer
	results even though the trained task is entirely different from the
	intelligence test itself. Furthermore, we demonstrate that the extent
	of gain in intelligence critically depends on the amount of training:
	the more training, the more improvement in Gf. That is, the training
	effect is dosage-dependent. Thus, in contrast to many previous studies,
	we conclude that it is possible to improve Gf without practicing
	the testing tasks themselves, opening a wide range of applications.},
  doi = {10.1073/pnas.0801268105}
}

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