American Psychological Association (APA)

Understanding Tourette Disorder, with John Piacentini, PhD | Speaking of Psychology

The podcast episode spotlights Tourette disorder and related tic conditions, clarifying common misconceptions—particularly the over‑emphasis on profanity tics—and presenting up‑to‑date prevalence data from the CDC that roughly one in fifty school‑aged children experience tics. Host Kim Mills interviews Dr. John Piacentini, a leading UCLA psychologist, who outlines diagnostic criteria, differentiates motor‑only, vocal‑only, and combined Tourette presentations, and emphasizes that coprolalia occurs in only about 10‑15 percent of cases. Piacentini explains the neurobiological underpinnings: an over‑active basal‑ganglia circuit with a “leaky” inhibitory filter that lets pre‑programmed motor chunks surface at inopportune moments. He links this mechanism to the heightened impulsivity seen in comorbid ADHD and the compulsive urges of OCD, noting that tics often serve as negative reinforcement, relieving uncomfortable pre‑monitory sensations. The discussion also covers the genetic basis, typical onset between ages four and seven, and the fact that most early‑life tics resolve, while a small minority persist into adulthood. Memorable illustrations include the “blue elephant” analogy for unwanted thoughts and the description of coprolalia as a tic that surfaces at the worst possible time. Piacentini traces the evolution of treatment—from early psychoanalytic myths and 1950s medication breakthroughs to the modern dominance of behavioral interventions such as Habit Reversal Training, first pioneered by Nathan Azrin and refined by contemporary researchers. He also highlights a pandemic‑era surge in functional tic‑like behaviors linked to social‑media exposure, underscoring the complex interplay of biology and environment. The episode underscores a paradigm shift: clinicians now prioritize evidence‑based behavioral therapies, often combined with selective medication, while families are urged to seek specialized care early. Awareness of the true prevalence of coprolalia and the potential for social‑media contagion can reduce stigma and improve early identification, ultimately shaping public health strategies and school‑based support systems.