A Test of the Behavioral Model of Tic Disorders Using a Dynamical Systems Framework.

Tic disorders are a class of neurodevelopmental disorders characterized by involuntary motor and/or vocal tics. It has been hypothesized that tics function to reduce aversive premonitory urges (i.e., negative reinforcement) and that suppression-based behavioral interventions such as habit reversal training (HRT) and exposure and response prevention (ERP) disrupt this process and facilitate urge reduction through habituation. However, previous findings regarding the negative reinforcement hypothesis and the effect of suppression on the urge-tic relationship have been inconsistent. The present study applied a dynamical systems framework and within-subject time-series autoregressive models to examine the temporal dynamics of urges and tics and assess whether their relationship changes over time. Eleven adults with tic disorders provided continuous urge ratings during separate conditions in which they were instructed to tic freely or to suppress tics. During the free-to-tic conditions, there was considerable heterogeneity across participants in whether and how the urge-tic relationship followed a pattern consistent with the automatic negative reinforcement hypothesis. Further, little evidence for within-session habituation was seen; tic suppression did not result in a reduction in premonitory urges for most participants. Analysis of broader urge change metrics did show significant disruption to the urge pattern during suppression, which has implications for the current biobehavioral model of tics.

A Mixed-Method Investigation of Parent Perspectives on Early Childhood Behavioral Services in Primary Care.

Primary care is a key setting for the delivery of parent-focused behavioral interventions. Various methods of intervention show promising efficacy but fail to engage adequate parental participation. This study used a sequential-explanatory mixed-method design to understand factors underlying parents' attitudes toward the content, sources, and delivery methods of behavioral guidance in primary care. Fifteen parents who previously participated in a larger survey study participated in interviews about their experiences and attitudes toward integrated primary care. Qualitative data were analyzed and sorted by quantitative data of interest to identify demographic, child, and parental factors that shape attitudes toward integrated care. Parents emphasized a need for tailored behavioral guidance, and multiple interconnected factors (e.g., trust of providers, perceived convenience of delivery modalities, stigma associated with behavioral health services) drove parents' attitudes toward behavioral primary care. These attitudes varied based on socioeconomic status, child behavior symptoms, and reported use of corporal punishment.

A Systematic Review of External Validity in Pediatric Integrated Primary Care Trials.

OBJECTIVE: We used the RE-AIM (Reach, Effectiveness, Adoption, Implementation, and Maintenance) framework to conduct a systematic review of external validity reporting in integrated primary care (IPC) interventions for mental health concerns. METHODS: We searched Medline, CINAHL, PsycINFO, the Cochrane Center Register of Controlled Trials, and relevant literature to identify publications from 1998 to 2018 reporting on open, randomized, or quasi-randomized trials of IPC interventions that targeted child (ages 0-18 years) psychological symptoms. For each publication, we extracted the information reported in each RE-AIM domain and calculated the proportion of the total studies reviewed. RESULTS: Thirty-nine publications describing 25 studies were included in the review. Publications rarely reported some indicators of external validity, including the representativeness of participants (12%), rate of adoption clinics or providers (16%), cost of implementation (8%), or evidence of maintenance (16%). Few studies reported on key pragmatic factors such as cost or organizational change processes related to implementation and maintenance. Strengths of some studies included comparisons of multiple active treatments, use of tailorable interventions, and implementation in "real world" settings. CONCLUSIONS: Although IPC interventions appear efficacious under research conditions, there are significant knowledge gaps regarding the degree to which they reach and engage target recipients, what factors impact adoption and implementation of IPC interventions by clinicians, how fidelity can be maintained over time, and cost-effectiveness. Pediatric IPC researchers should embrace dissemination and implementation science methods to balance internal and external validity concerns moving forward.

Patterned changes in urge ratings with tic suppression in youth with chronic tic disorders.

BACKGROUND: Premonitory urges are central to emerging behavioral models of chronic tic disorders (CTD). Urge reduction has been proposed as a behavioral explanation for tic maintenance and exacerbation as well as the efficacy of behavioral treatments. Prior investigations have produced inconsistent findings despite common methodologies. The current study evaluated the possibility that data aggregation obscures distinct and meaningful patterns of change in urge ratings when tics are freely expressed versus suppressed. METHOD: Participants (n = 12) included children with moderate-to-marked tic severity and noticeable premonitory urges. Tic frequencies and urge ratings were obtained at 15 s and 10-s intervals, respectively, across an alternating sequence of 10-min tic freely and 40-min tic suppression conditions. Patterns were established using a two step approach. RESULTS: Five distinct patterns of urge rating change emerged, suggesting data aggregation may obscure meaningful patterns in the urge-tic relationship when tics are completed versus suppressed. LIMITATIONS: Eligibility criteria may have unintentionally excluded younger affected children and included older participants with more severe tic disorders than commonly seen. Additional research with less stringent eligibility criteria and a larger sample size will help validate the results. CONCLUSIONS: The relationship between urges and tics is much more complex than previously theorized. Investigations that rely on global assessments of urge and tic severity and/or assume uniformity when aggregating participant data may obscure meaningful differences in the urge-tic relationship. Future investigations should examine the possibility that individual differences and/or developmental considerations modulate the functional urge-tic relationship.

Development of the pediatric accommodation scale: reliability and validity of clinician- and parent-report measures.

The present study developed parallel clinician- and parent-rated measures of family accommodation (Pediatric Accommodation Scale, PAS; Pediatric Accommodation Scale-Parent Report; PAS-PR) for youth with a primary anxiety disorder. Both measures assess frequency and impact of family accommodation on youth and families. Studying youth ages 5-17 (N=105 caregiver-youth dyads), results provide evidence for the psychometric properties of the PAS, including internal consistency, inter-rater reliability, and convergent and discriminant validity. The PAS-PR exhibited good internal consistency and convergent validity with the PAS. Nearly all parents (>95%) endorsed some accommodation and accommodation frequency was associated with parent-rated impairment (home and school), and with youth-rated impairment (school only). Greater impact of accommodation on parents was associated with parent self-reported depressive symptoms. Findings support the common occurrence of family accommodation in youth with anxiety disorders, as well as for the use of the PAS and PAS-PR to measure family accommodation in this population.

Clinical Correlates and Predictors of Caregiver Strain in Children with Chronic Tic Disorders.

Although tics are the defining feature of chronic tic disorders (CTD), many children experience comorbid internalizing and externalizing problems that contribute to impairment across several domains, including family functioning. The current study examined clinical correlates and predictors of caregiver strain in parents of children with CTD. Participants were 123 children and adolescents diagnosed with a CTD who participated in a randomized-controlled trial of behavior therapy for reducing tics. Results showed that a combination of disruptive behavior, inattention/hyperactivity, and tic intensity best explained objective strain and a combination of inattention/hyperactivity and tic intensity were the best predictors of subjective caregiver strain. Implications of these findings for care providers are discussed.

Variables Associated With Tic Exacerbation in Children With Chronic Tic Disorders.

Research has shown that motor and vocal tics fluctuate in frequency, intensity, and form in response to environmental and contextual cues. Behavioral models have proposed that some of the variation in tics may reflect context-dependent interactive learning processes such that once tics are performed, they are influenced by environmental contingencies. The current study describes the results of a function-based assessment of tics (FBAT) from a recently completed study comparing Comprehensive Behavioral Intervention for Tics (CBIT) with supportive psychotherapy. The current study describes the frequency with which antecedent and consequence variables were reported to exacerbate tics and the relationships between these functional variables and sample baseline characteristics, comorbidities, and measures of tic severity. Results showed that tic-exacerbating antecedents and consequences were nearly ubiquitous in a sample of children with chronic tic disorder. In addition, functional variables were related to baseline measures of comorbid internalizing symptoms and specific measures of tic severity.

Is There a Relationship Between Tic Frequency and Physiological Arousal? Examination in a Sample of Children With Co-Occurring Tic and Anxiety Disorders.

Stress is the contextual variable most commonly implicated in tic exacerbations. However, research examining associations between tics, stressors, and the biological stress response has yielded mixed results. This study examined whether tics occur at a greater frequency during discrete periods of heightened physiological arousal. Children with co-occurring tic and anxiety disorders (n = 8) completed two stress-induction tasks (discussion of family conflict, public speech). Observational (tic frequencies) and physiological (heart rate [HR]) data were synchronized using The Observer XT, and tic frequencies were compared across periods of high and low HR. Tic frequencies across the entire experiment did not increase during periods of higher HR. During the speech task, tic frequencies were significantly lower during periods of higher HR. Results suggest that tic exacerbations may not be associated with heightened physiological arousal and highlight the need for further tic research using integrated measurement of behavioral and biological processes.