Document Type



Doctor of Philosophy


School Psychology

First Adviser

DuPaul, George J.


Adolescents with ADHD are likely to have poor sleep hygiene and experience heightened daytime sleepiness. Given that the combination of poor sleep hygiene and heightened daytime sleepiness is likely to result in functional impairment in school settings for healthy adolescents, it was hypothesized that adolescents with ADHD, who present with poor sleep hygiene and/or heightened daytime sleepiness, as well as educational difficulties, are an even more vulnerable population for experiencing academic impairment. The purpose of the current study was to better understand the role of daytime sleepiness in the association between sleep hygiene and academic functioning among high school students with ADHD. To that end, the following research question was examined: Is the relationship between sleep hygiene and academic functioning mediated by daytime sleepiness?Participants included 163 high school students (Male = 77.3%; 80.4% Caucasian; 16.6% African American) who met diagnostic criteria for ADHD (Age range= 13.98-17.87 years of age; M = 15.33; SD = .84). Participants completed the Pediatric Daytime Sleepiness Scale (PDSS) and the Adolescent Sleep Hygiene Scale (ASHS). There were significant correlations between sleep hygiene and homework problems, daytime sleepiness and GPA, and daytime sleepiness and homework problems. Grade point average (GPA), WJ-Brief Achievement scores, and parent-reported Homework Problems Checklist (HPC) were used to represent academic functioning in three separate models. Structural equation modeling was utilized to test if the relationship between sleep hygiene and academic functioning is mediated by daytime sleepiness. Results indicated that the relationship between sleep hygiene and academic functioning was not mediated by daytime sleepiness.Findings from the current study suggest that among adolescents with ADHD, excessive daytime sleepiness as opposed to poor sleep hygiene may impede academic functioning. This would indicate that addressing their daytime symptoms would yield better academic outcomes. In regards to academic functioning, intervening through improving sleep hygiene behavior alone may not be robust enough to impact their daytime functioning and subsequently improve overall academic functioning. However, these results also suggest that sleep environmental factors as well as physiological arousal may be important aspects of sleep hygiene to address among adolescents with ADHD when aiming to decrease homework difficulties.