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Developmental Neuropsychology Volume 34, 2009 - Issue 3
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Original Articles

The Effect of Age on Attentional Modulation in Dichotic Listening

Fiia Takio Department of Psychology, University of Turku, Turku, Finland; Centre for Cognitive Neuroscience, University of Turku, Turku, Finland
,
Mika Koivisto Department of Psychology, University of Turku, Turku, Finland; Centre for Cognitive Neuroscience, University of Turku, Turku, Finland
,
Laura Jokiranta Department of Psychology, University of Turku, Turku, Finland
,
Faramosh Rashid Department of Psychology, University of Turku, Turku, Finland
,
Johanna Kallio Learning Research Laboratory (LearnLab), Department of Educational Sciences and Teacher Education, University of Oulu, Oulu, Finland
,
Tuulikki Tuominen Learning Research Laboratory (LearnLab), Department of Educational Sciences and Teacher Education, University of Oulu, Oulu, Finland
,
Seppo J. Laukka Learning Research Laboratory (LearnLab), Department of Educational Sciences and Teacher Education, University of Oulu, Oulu, Finland
&
Heikki Hämäläinen Department of Psychology, University of Turku, Turku, Finland; Centre for Cognitive Neuroscience, University of Turku, Turku, Finland
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Pages 225-239 | Published online: 12 May 2009
 
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Abstract

The right-ear advantage (REA) in Dichotic listening (DL) reflects stimulus-driven bottom-up asymmetry in speech processing. The REA can be modified by top-down attentional control. We investigated attentional control in DL task as a function of age. A total of 186 participants between the ages of 5 and 79 years were tested. The youngest children demonstrated a REA that was not modified by attention, suggesting that bottom-up functional asymmetry was present. The 10–11-year-olds began to show ability to voluntarily modify DL, but only young adults were fully capable of doing so. In 59–79-year-olds, this top-down attentional control was lost again.

Notes

This study was supported financially by the Nordic Centre of Excellence in Cognitive Control. M.K. was supported by the Academy of Finland (project 110957 and 125175).

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