[Attention parameters in visual search tasks in various human age groups]

The visual search performance was investigated in two children (5 and 7-years-old) and three adult groups (15, 20--and 35 and up to 60-years-old). The results of adults were similar among themselves and therefore were taken as a control set for children group results. We used 5 sorts of visual tasks, one difficult task and four easy tasks for adults with a target differing from counter-irritation. Children's results were worse than adults' those: the search time was longer and children made plenty of errors (false alarms end misses of targets). We suggest that children's attention system was less effective than adults' one in result of frontal, parietal and temporal cortical structure activation deficit. It follows that attention system is completely developed by 15 years of age in humans.