ABSTRACT
BACKGROUND: The aim of this investigation was to examine the construct validity and distinctiveness of the inattentive type (IT) and combined type (CT) of Attention-Deficit/Hyperactivity Disorder (ADHD) in a Latino/Hispanic sample. METHOD: A comprehensive assessment was conducted with a clinically diagnosed school-based sample of 98 children aged 6 to 11 (CT=44; IT=25; control group=29). RESULTS: Both ADHD groups were impaired on academic achievement measures, presented more ADHD-type behaviors during math and vigilance tasks, and exhibited greater internalizing symptoms. The IT group had a later onset of inattention symptoms, presented more sluggish cognitive tempo symptoms, was less prone to initiate social interactions or to be assertive and more self-controlled in social interchanges, was less likely to have externalizing behaviors, had mothers who reported less child-related family stress, and was less impaired in their adaptive functioning. CONCLUSIONS: Findings supported the construct validity of ADHD in this culturally different sample and suggested that the CT and IT represent distinct disorders.
Subject(s)
Attention Deficit Disorder with Hyperactivity/classification , Attention Deficit Disorder with Hyperactivity/diagnosis , Diagnostic and Statistical Manual of Mental Disorders , Attention Deficit Disorder with Hyperactivity/epidemiology , Child , Educational Status , Female , Humans , Logistic Models , Male , Multivariate Analysis , Psychological Tests , Puerto Rico/epidemiology , Reproducibility of Results , Social AdjustmentABSTRACT
This study compared Hispanic children (ages 7 to 11) with combined type (CT, n=33) and inattentive type (IT, n=21) attention deficit hyperactivity disorder (ADHD) and a control group (n=25) on time-estimation and time-reproduction tasks. The ADHD groups showed larger errors in time reproduction but not in time estimation than the control group, and the groups did not differ from each other on their performance on this task. Individual differences could not be accounted for by oppositional-defiance ratings and low math or reading scores. Although various measures of executive functioning did not make significant unique contributions to time estimation performance, those of interference control and nonverbal working memory did so to the time-reproduction task. Findings suggest that ADHD is associated with a specific impairment in the capacity to reproduce rather than estimate time durations and that this may be related to the children's deficits in inhibition and working memory.