Working memory capacity and its relation to general intelligence. Conway, A. R., Kane, M. J., & Engle, R. W. Trends Cogn Sci, 7(12):547 - 552, 2003.
doi  abstract   bibtex   
Early investigations of working memory capacity (WMC) and reasoning ability suggested that WMC might be the basis of Spearman's g. However, recent work has uncovered details about the basic processes involved in working memory tasks, which has resulted in a more principled approach to task development. As a result, claims now being made about the relation between WMC and g are more cautious. A review of the recent research reveals that WMC and g are indeed highly related, but not identical. Furthermore, WM span tasks involve an executive-control mechanism that is recruited to combat interference and this ability is mediated by portions of the prefrontal cortex. More combined experimental-differential research is needed to understand better the basis of the WMC-g relation.
@Article{Conway2003,
  author   = {Andrew R. Conway and Michael J. Kane and Randall W. Engle},
  journal  = {Trends Cogn Sci},
  title    = {Working memory capacity and its relation to general intelligence},
  year     = {2003},
  issn     = {1364-6613},
  number   = {12},
  pages    = {547 - 552},
  volume   = {7},
  abstract = {Early investigations of working memory capacity (WMC) and reasoning
	ability suggested that WMC might be the basis of Spearman's g. However,
	recent work has uncovered details about the basic processes involved
	in working memory tasks, which has resulted in a more principled
	approach to task development. As a result, claims now being made
	about the relation between WMC and g are more cautious. A review
	of the recent research reveals that WMC and g are indeed highly related,
	but not identical. Furthermore, WM span tasks involve an executive-control
	mechanism that is recruited to combat interference and this ability
	is mediated by portions of the prefrontal cortex. More combined experimental-differential
	research is needed to understand better the basis of the WMC-g relation.},
  doi      = {10.1016/j.tics.2003.10.005},
}

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