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. Author manuscript; available in PMC: 2006 Jun 6.
Published in final edited form as: Dev Psychopathol. 2005;17(3):807–825. doi: 10.1017/S0954579405050388

Figure 1.

Figure 1

The scores for 4.5- to 15-year-old children on the number of items that can be held in mind (span) on the counting-span and spatial-span tasks. The data for the counting-span task are adapted from Crammond (1992) and those from the spatal-span task are adapted from Menna (1989). From “Normal development of prefrontal cortex from birth to young adulthood: Cognitive functions, anatomy, and biochemistry,” by A. Diamond. In Principles of Frontal Lobe Function, by D. T. Stuss and R. T. Knight (Eds.), 2002, London: Oxford University Press. Copyright 2002 by Oxford University Press. Reprinted with permission.