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. 2008 Apr;36(3):323-33.
doi: 10.1007/s10802-007-9180-x. Epub 2007 Oct 9.

Hot and cool forms of inhibitory control and externalizing behavior in children of mothers who smoked during pregnancy: an exploratory study

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Hot and cool forms of inhibitory control and externalizing behavior in children of mothers who smoked during pregnancy: an exploratory study

Stephan C J Huijbregts et al. J Abnorm Child Psychol. 2008 Apr.

Abstract

This study examined whether children exposed to prenatal smoking show deficits in "hot" and/or "cool" executive functioning (EF). Hot EF is involved in regulation of affect and motivation, whereas cool EF is involved in handling abstract, decontextualized problems. Forty 7 to 9-year-old children (15 exposed to prenatal smoking, 25 non-exposed) performed two computerized tasks. The Sustained Attention Dots (SA-Dots) Task (as a measure of "cool" inhibitory control) requires 400 non-dominant hand and 200 dominant hand responses. Inhibitory control of the prepotent response is required for dominant hand responses. The Delay Frustration Task (DeFT) (as a measure of "hot" inhibitory control) consists of 55 simple maths exercises. On a number of trials delays are introduced before the next question appears on the screen. The extent of response-button pressing during delays indicates frustration-induced inhibitory control. Prenatally exposed children showed poorer inhibitory control in the DeFT than non-exposed children. A dose-response relationship was also observed. In addition, prenatally exposed children had significantly higher (dose-dependent) conduct problem- and hyperactivity-inattention scores. There were no significant group differences in inhibitory control scores from the SA-Dots. These results indicate that children exposed to prenatal smoking are at higher risk of hot but not cool executive function deficits.

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Figures

Fig. 1
Fig. 1
Mean standardized scores on the SA-dots task, the Delay Frustration Task, and the Strengths and Difficulties Questionnaire for non-exposed vs exposed offspring. Bias and RTae are the inhibitory control measures from the SA-Dots task. DF-np (mean number of presses during 20 s intervals), DF-tp (mean duration of presses during 20 s intervals), and DF-np*tp (product of DF-np and DF-tp) are the inhibitory control measures from the Delay Frustration Task. SDQ-CP: Strengths and Difficulties Questionnaire—Conduct Problems, SDQ-HI: Strengths and Difficulties Questionnaire—Hyperactivity/Inattention
Fig. 2
Fig. 2
Dose-dependency in associations between maternal prenatal smoking and scores on the Delay Frustration Task and the Strengths and Difficulties Questionnaire. DF-np (mean number of presses during 20 s intervals), DF-tp (duration of presses during 20 s intervals), and DF-np*tp (product of DF-NP and DF-TP) are the inhibitory control measures from the delay frustration task. SDQ-CP: Strengths and Difficulties Questionnaire—Conduct Problems, SDQ-HI: Strengths and Difficulties Questionnaire—Hyperactivity/Inattention

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