Brenna B. Maddox
Children's Hospital of Philadelphia
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Featured researches published by Brenna B. Maddox.
Journal of the American Academy of Child and Adolescent Psychiatry | 2013
Carla A. Mazefsky; John D. Herrington; Matthew Siegel; Angela Scarpa; Brenna B. Maddox; Lawrence Scahill; Susan W. White
OBJECTIVE Autism spectrum disorder (ASD) is associated with amplified emotional responses and poor emotional control, but little is known about the underlying mechanisms. This article provides a conceptual and methodologic framework for understanding compromised emotion regulation (ER) in ASD. METHOD After defining ER and related constructs, methods to study ER were reviewed with special consideration on how to apply these approaches to ASD. Against the backdrop of cognitive characteristics in ASD and existing ER theories, available research was examined to identify likely contributors to emotional dysregulation in ASD. RESULTS Little is currently known about ER in youth with ASD. Some mechanisms that contribute to poor ER in ASD may be shared with other clinical populations (e.g., physiologic arousal, degree of negative and positive affect, alterations in the amygdala and prefrontal cortex), whereas other mechanisms may be more unique to ASD (e.g., differences in information processing/perception, cognitive factors [e.g., rigidity], less goal-directed behavior and more disorganized emotion in ASD). CONCLUSIONS Although assignment of concomitant psychiatric diagnoses is warranted in some cases, poor ER may be inherent in ASD and may provide a more parsimonious conceptualization for the many associated socioemotional and behavioral problems in this population. Further study of ER in youth with ASD may identify meaningful subgroups of patients and lead to more effective individualized treatments.
Autism | 2015
Connor M. Kerns; Brenna B. Maddox; Philip C. Kendall; Keiran Rump; Leandra Berry; Robert T. Schultz; Margaret C. Souders; Amanda Bennett; John D. Herrington; Judith Miller
This study investigated the accuracy of brief anxiety scales for non-treatment-seeking youth with autism spectrum disorder. In all, 54 youth (7–17 years; IQ: 67–158) with autism spectrum disorder and their parents completed (a) an expanded version of the Anxiety Disorders Interview Schedule—Child/Parent designed to capture typical and atypical fears and (b) brief scales of anxiety symptoms (Behavior Assessment Schedule for Children, Second Edition; Screen for Child Anxiety and Related Emotional Disorders; Negative Affective Self-Statement Questionnaire; Pediatric Anxiety Rating Scale). The results indicate that measures lacked adequate sensitivity and specificity, and the detection of atypical fears was particularly poor. Revised cut scores are offered, but refined and/or revised instruments are likely needed for research on youth with autism spectrum disorder.
Journal of Autism and Developmental Disorders | 2015
Cara E. Pugliese; Lauren Kenworthy; Vanessa Hus Bal; Gregory L. Wallace; Benjamin E. Yerys; Brenna B. Maddox; Susan W. White; Haroon Popal; Anna Chelsea Armour; Judith Miller; John D. Herrington; Robert T. Schultz; Alex Martin; Laura Gutermuth Anthony
Recent updates have been proposed to the Autism Diagnostic Observation Schedule-2 Module 4 diagnostic algorithm. This new algorithm, however, has not yet been validated in an independent sample without intellectual disability (ID). This multi-site study compared the original and revised algorithms in individuals with ASD without ID. The revised algorithm demonstrated increased sensitivity, but lower specificity in the overall sample. Estimates were highest for females, individuals with a verbal IQ below 85 or above 115, and ages 16 and older. Best practice diagnostic procedures should include the Module 4 in conjunction with other assessment tools. Balancing needs for sensitivity and specificity depending on the purpose of assessment (e.g., clinical vs. research) and demographic characteristics mentioned above will enhance its utility.
Journal of Autism and Developmental Disorders | 2017
Brenna B. Maddox; Yasuo Miyazaki; Susan W. White
Anxiety interventions involving social skills training and CBT for youth with ASD have shown promise, but few studies have examined the effects on social functioning or the maintenance of treatment gains. This study evaluated change in social skills during a randomized controlled trial of CBT and during the 1-year follow-up for 25 adolescents with ASD and anxiety. We examined the effect of pretreatment social anxiety and loneliness on treatment response. Social impairment improved during treatment and continued to improve through the 3-month follow-up. Although adolescents with higher social anxiety had greater pretreatment social impairment, they showed steeper improvement in social skills during treatment. Loneliness was not a significant predictor of change during treatment. CBT targeting social skills and anxiety can lead to long-term improvements in social functioning.
Autism | 2017
Brenna B. Maddox; Andrea Trubanova; Susan W. White
Recent studies have examined non-suicidal self-injury in community and clinical samples, but there is no published research on non-suicidal self-injury in individuals with autism spectrum disorder. This lack of research is surprising, since individuals with autism spectrum disorder have high rates of risk factors for non-suicidal self-injury, including depression and poor emotion regulation skills. Using an online survey, we examined non-suicidal self-injury methods, frequency, severity, functions, and initial motivations in adults with autism spectrum disorder (n = 42). We also compared their non-suicidal self-injury characteristics to those of a gender-matched group of adults without autism spectrum disorder (n = 42). Of the participants with autism spectrum disorder, 50% reported a history of non-suicidal self-injury. This proportion is higher than non-suicidal self-injury rates previously reported for college students, adult community samples, and adolescents with autism spectrum disorder, which suggests that adults with autism spectrum disorder have increased risk for engaging in non-suicidal self-injury. Women with autism spectrum disorder were significantly more likely to endorse non-suicidal self-injury, relative to men with autism spectrum disorder. A history of non-suicidal self-injury was not related to current depression or emotion dysregulation for the participants with autism spectrum disorder. Non-suicidal self-injury characteristics among the adults with autism spectrum disorder were similar to non-suicidal self-injury in adults without autism spectrum disorder. These preliminary findings highlight the need for increased awareness and further research about non-suicidal self-injury within autism spectrum disorder.
Focus on Autism and Other Developmental Disabilities | 2015
Susan W. White; Angela Scarpa; Caitlin M. Conner; Brenna B. Maddox; Saray Bonete
Despite the impact of social disability on the lives of people with Autism Spectrum Disorders (ASDs), we know little about how to assess clinical improvement in this domain. This is a preliminary study of the potential utility and sensitivity of a novel observational rating system, the Contextual Assessment of Social Skills (CASS), as a treatment outcome measure with cognitively unimpaired adults with ASD. Five cognitively unimpaired adults with ASD completed the CASS, before and after a group social skills intervention. Based on ratings made by evaluators masked to assessment (pre-treatment or post-treatment), reliable change indices were computed to assess improvement. Four participants demonstrated significant improvement in conversational involvement, two initiated significantly more topic changes, and one asked more questions. Laboratory-based observational measures, such as the CASS, may be useful in clinical trials for adults with ASD, though further evaluation with larger samples is required.
Journal of Autism and Developmental Disorders | 2017
John D. Herrington; Brenna B. Maddox; Connor M. Kerns; Keiran Rump; Julie Worley; Jennifer C. Bush; Alana J. McVey; Robert T. Schultz; Judith S. Miller
Recent studies suggest that longstanding findings of abnormal amygdala morphology in ASD may be related to symptoms of anxiety. To test this hypothesis, fifty-three children with ASD (mean age = 11.9) underwent structural MRI and were divided into subgroups to compare those with at least one anxiety disorder diagnosis (n = 29) to those without (n = 24) and to a typically developing control group (TDC; n = 37). Groups were matched on age and intellectual level. The ASD and anxiety group showed decreased right amygdala volume (controlled for total brain volume) relative to ASD without anxiety (p = .04) and TDCs (p = .068). Results suggest that youth with ASD and co-occurring anxiety have a distinct neurodevelopmental trajectory.
Archive | 2016
Lara J. Farrell; Sophie C. James; Brenna B. Maddox; Donna L. Griffiths; Susan W. White
Ritualized and repetitive behaviours are included in the diagnostic criteria for both autism spectrum disorder (ASD) and obsessive-compulsive disorder (OCD). OCD often co-occurs in young people with ASD, yet there is little clinical research on its phenomenology or treatment. The extant research in this area is largely composed of qualitative and single-subject study designs. In this chapter, we synthesize this body of research and provide recommendations for differential and dual diagnostic decision-making and treatment planning. The case of a 16-year-old male with comorbid ASD and OCD is presented, in which we demonstrate how standard cognitive-behavioural therapy (CBT) for OCD may be modified, for instance, to address problems with emotion regulation that hinder progression through an exposure-based therapy.
Behaviour Research and Therapy | 2017
Rinad S. Beidas; Laura C. Skriner; Danielle R. Adams; Courtney Benjamin Wolk; Rebecca E. Stewart; Emily M. Becker-Haimes; Nathaniel J. Williams; Brenna B. Maddox; Ronnie Rubin; Shawna Weaver; Arthur C. Evans; David S. Mandell; Steven C. Marcus
We investigated the relationship between consumer, clinician, and organizational factors and clinician use of therapy strategies within a system-wide effort to increase the use of cognitive-behavioral therapy. Data from 247 clinicians in 28 child-serving organizations were collected. Clinicians participating in evidence-based practice training initiatives were more likely to report using cognitive-behavioral therapy when they endorsed more clinical experience, being salaried clinicians, and more openness to evidence-based practice. Clinicians participating in evidence-based practice initiatives were more likely to use psychodynamic techniques when they had older clients, less knowledge about evidence-based practice, more divergent attitudes toward EBP, higher financial strain, and worked in larger organizations. In clinicians not participating in evidence-based training initiatives; depersonalization was associated with higher use of cognitive-behavioral; whereas clinicians with less knowledge of evidence-based practices were more likely to use psychodynamic techniques. This study suggests that clinician characteristics are important when implementing evidence-based practices; and that consumer, clinician, and organizational characteristics are important when de-implementing non evidence-based practices. This work posits potential characteristics at multiple levels to target with implementation and deimplementation strategies.
Research in Autism Spectrum Disorders | 2018
Brenna B. Maddox; Christina D. Kang-Yi; Edward S. Brodkin; David S. Mandell
Background While a growing body of research suggests that talk therapies can reduce anxiety and depression in adults with autism spectrum disorder (ASD), we know little about what community treatment for these disorders looks like for them. The present study investigated whether treatment utilization differs between adults with and without ASD who have anxiety or depression. Method Using Pennsylvania Medicaid claims data, adults aged 18-65 years diagnosed with ASD and depression or anxiety (n = 268) were matched 1:4 to adults with depression or anxiety disorder without ASD (n = 1,072). Chi-square tests and generalized linear models were used to estimate differences in diagnoses and psychiatric treatment between groups. Results While the proportion of people prescribed benzodiazepine and antidepressants did not differ between groups, the ASD group had more days per month prescribed for all medications. Adults with ASD also were more likely to be prescribed multiple medications concurrently and to use case management. Adults without ASD were more likely to receive talk therapy for anxiety/depression. Among those receiving talk therapy, adults with ASD averaged more individual visits per month. Conclusions Findings suggest that therapists may need more session time for adults with ASD, although it is unclear if this time is dedicated to anxiety or depression treatment. The greater use of psychotropic medications among adults with ASD may suggest unresponsiveness to the talk therapy they receive or greater clinical complexity.