科研之友
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摘要
objective: to compare the effect of adhd subtypes in tasks of focused, shifted and sustained attention in a visual attention test (tavis-iii). indexes of hit reaction time, omission errors and commission errors were considered for each task. methods: one hundred two children and adolescents aged from 6 to 17 years old recruited from one public and two private schools in the city of rio de janeiro with adhd diagnosis, according to dsm-iv criteria, were evaluated. three groups were created following the subtypes determined by the semi-structured interview (p-chips). group performances were compared in order to determine subtype effects. results: the combined subtype (c) was the most common group (n = 65; 63.7%), followed by the inattentive subtype (i) (n = 32; 31.4%). hyperactive-impulsive (hi) group was excluded from statistical analysis due to its low frequency. the performance of the c group was found comparatively worse only in the sustained attention task, where subjects presented slower hit reaction time and committed more commission errors (p %26lt; 0.05) than the i group. conclusion: only in longer tasks of visual attention, combined patients had a worse performance than inattentive ones.
