ABSTRACT

In neuropsychological research on normal development relatively little interest has been devoted to age-related changes in school age. This is surprising in the light of the significance of the changes that take place in this period of life; the availability of normative data; and the ongoing research on neural development. The studies included in this issue take a closer look at normative data from school-age children of various ages in performances of attention, language, sensorimotor and perceptual functions, memory and learning, and functional asymmetries. It is hoped that this special issue will draw attention to the scarcity of data in this realm and to the possibilities of utilizing existing databases for study on normal development in school age.

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+2 3+4 1+2 3+4 Contingency Naming Test: Time to completion scores for children and ado-

lescents; (bottom) Contingency Naming Test: Error there appears to be an earlier developmental spurt around 12 for goal-setting This improvement was seen most clearly on the A similar trend was seen for

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CODES

of Complex Figure of Rey) CODE:ERR

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to more environmentally based theories focusing on the different

of association present across that different devel- the three domains under examination, rais- 53-60. Bjorklund, D. F. (1989). Children's thinking: Developmental function individual differences. Pa- Brooks/Cole.

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(1), 428

Copyright © 2001, Lawrence Erlbaum Associates, Inc. 12-Year-Old Finnish Children Liisa Klenberg

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Tower. This subtest is designed to assess the EFs o

subtest, the is required to generate words from phonemic categories. It requires the use o that begin with specified letters. The

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here considered as

test scores are always imperfect indicators tent variables, which may be either components attentional and or both, or that are represented in the test (Fletcher, 1996,1998).

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tors may indicate that the task is multidimensional, so that the correlations are scat-

that has been reported also by Pascualvaca et al. subtests Statue

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that include an even greater variety

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ACKNOWLEDGMENT was supported by the Academy Finland and the Ebeneser Foundation,

Baddeley, Barkley, a unifying theory of ADHD. Psychological Bulletin, Goldman-Rakic, S. (1987). Development of cortical circuitry cognitive function. Child Develop- 601-622.

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J. (1995). Neuropsychology of mental programming: approach for the evaluation of frontal lobe dysfunction. Applied Neuropsychology,

C, & Pennington, B. F. (1988). Assessing frontal lobe functioning in children: Views from developmental psychology. Developmental Neuropsychology, C, Pennington, B. F., & Groisser, D. B. (1991). normative study of executive function: a window on prefrontal function in children. Developmental Neuropsychology, 131-149.

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Copyright © 2001, Lawrence Erlbaum Associates, Inc. 8 and Their Role in Cognitive Performances De Agostini and Georges Dellatolas

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to the examination) was matched

start o

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repeat sequences

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CPMT-Laterality Index

degree handedness (Pearson's r = r=-.52,p < .001 among right- and left-handers, respectively, handedness (f = 2.8, df= 193,p = .005, Figure and the 250,p = .83, 254,p = .69) or age (Pearson's r = -

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Proportion of Left-handers by

is, equal hand skill. figures show each of the groups proportion of left-handers, (B) proportion of left-handedness parents, (C) proportion of left-handed children with right-foot preference right-handed children with left-foot preference, and (D) the proportion of left-handed children with right-eye preference right-handed children with left-eye prefer-

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same direction, showing a trend o

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pants without clear hand advantage. The figures in Crow et 's article showing the

Annett, Annett, & Kilshaw, bution of L-R differences males and females. British Journal of Psychology,

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De Agostini, & Dellatolas, G. (1988). Une épreuvesimple pour évaluer la preference manuelle chez

1'enfant partir de 3 ans. Enfance, 41, 139-147. De Agostini, Khamis, Ahui, & Dellatolas, G. (1997). Environmental influences in hand preference: African point of view. Brain and Cognition, Dellatolas, G., Curt, F., Dargent-Pare, C, & De Agostini, (1998). Eye-dominance in children: lon- gitudinal study. Behavior Genetics, Dellatolas, G., De Agostini, Jallon, P., Poncet, Rey, & Lellouch, J. (1988). Mesure de la

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advantage

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demonstrate a significant

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for simultaneous onset and offset between the right and left channels.

to avoid confusing the participant, the participant was told that he or she would that he or she should report which one he or she heard among the six pos- that "on some oc-

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test began. For the

tests with

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Scatter Plots and Correlations 4 shows scatter plots o f individual scores in the DL response space devel-

by Hugdahl (1995). The response space consists of individual scores for the ear (x-axis) plotted against the corresponding scores for the left ear (y-axis) the 45° "symmetry line" drawn across the plot. The response space thus shows a sample who have a those who have an

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scatters for the children and adolescents

these age groups. The scatter plots in Figure 4 show that the

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the youngest children (7-8 years) showed a the

age group (9 years) showed about equal performance on the right-and left-ear the older the participants became (up ACKNOWLEDGMENT was financially supported by the Norwegian Research

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Hugdahl, K. (1995). Dichotic listening: Probing temporal lobe functional integrity. In R. J. Davidson & 123-156). Cambridge MIT Press.

K. Hugdahl (Eds.), Brain asymmetry (pp. Hugdahl, K., & Andersson, B. follow-up. Journal of Clinical and Experimental Neuropsychology, 9, 631-649. Hugdahl, CV-syllables: comparison between adults and children. Cortex, 22, Loberg, E. Hugdahl, K., & Green, F. (1999). Hemispheric asymmetry in schizophrenia: "dual deficits" model. Biological Psychiatry, B., Taylor, L., & Sperry, R. (1968). Lateralized suppression of dichotically presented digits after commissural section in man. Science, 161, 184-186. Mondor, T. A., & Bryden, M. P. (1991). The influence of attention on the dichotic REA.