Symptom Properties as a Function of ADHD Type: An Argument for Continued Study of Sluggish Cognitive Tempo

@article{Mcburnett2001SymptomPA,
  title={Symptom Properties as a Function of ADHD Type: An Argument for Continued Study of Sluggish Cognitive Tempo},
  author={Keith Mcburnett and Linda J. Pfiffner and Paul J. Frick},
  journal={Journal of Abnormal Child Psychology},
  year={2001},
  volume={29},
  pages={207-213}
}
Inconsistent alertness and orientation (sluggishness, drowsiness, daydreaming) were reported to accompany Attention Deficit Disorder (ADD) without Hyperactivity in DSM-III. Such Sluggish Cognitive Tempo items were tested in the DSM-IV Field Trial for ADHD, but were discarded from the Inattention symptom list because of poor negative predictive power. Using 692 children referred to a pediatric subspecialty clinic for ADHD, Sluggish Tempo items were re-evaluated. When Hyperactivity–Impulsivity… 
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Validity of the Sluggish Cognitive Tempo, Inattention, and Hyperactivity Symptom Dimensions: Neuropsychological and Psychosocial Correlates
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The distinct factors of hyperactivity-impulsivity and SCT had unique associations with impairing comorbidities and are roughly equivalent in predicting external correlates of ADHD-related impairment.
The Relation Between Sluggish Cognitive Tempo and DSM-IV ADHD
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Results suggest that SCT is an internally consistent construct that is significantly associated with DSM-IV inattention.
DSM-IV-Defined Inattention and Sluggish Cognitive Tempo: Independent and Interactive Relations to Neuropsychological Factors and Comorbidity
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Findings from the present study support the notion that DSM-IV-defined inattention constitutes a somewhat heterogeneous condition and can further the theoretical understanding of the neuropsychological impairments and comorbid behavioral problems associated with ADHD symptoms.
Does Sluggish Cognitive Tempo Fit Within a Bi-Factor Model of ADHD?
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Although SCT symptoms were strongly associated with inattention, they loaded onto a factor independent of ADHD g, which supports a growing body of research suggesting SCT to be distinct and separate from ADHD.
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TLDR
The findings corroborate previous phenotypic data suggesting that SCT symptoms do not define a clinically relevant type of ADHD-I.
Structure and Validity of Sluggish Cognitive Tempo Using an Expanded Item Pool in Children with Attention-Deficit/Hyperactivity Disorder
TLDR
Simultaneous regressions of impairment and comorbidity on SCT and ADHD factors found that Daydreams was associated with global impairment, and Sleepy/Tired wasassociated with organizational problems and depression ratings, across both informants.
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TLDR
Although the 2 groups did not differ on level of attention or learning problems, high-SCT ADHD/IA children were rated by teachers as showing less externalizing behavior and higher levels of unhappiness, anxiety/depression, withdrawn behavior, and social dysfunction, support a reconsideration of SCT symptoms as a component of diagnostic criteria for a category of nonhyperactive attention deficit disorder.
Evaluating the Utility of Sluggish Cognitive Tempo in Discriminating Among DSM-IV ADHD Subtypes
TLDR
The current results suggest that the inclusion of parent-reported SCT symptoms in the ADHD diagnostic criteria has limited utility for isolating diagnostically meaningful subgroups of the Inattentive type or for enhancing the external validity of the ADHD subtypes in clinic-referred samples.
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