Children with good "executive function" skills, including self-control and the ability to focus on tasks, tend to be more skillful liars, Dr. Talwar says.
Farrow had been diagnosed with a psychopathic personality disorder and his barrister argued it "substantially affected" his ability to exercise self-control.
Rodriguez, who began working with Li in August, has improved his charge's ability to control her emotions by giving her homework, including writing self-affirmations.