The school is one of three high schools in the Columbia Public School District, with admission based primarily on the locations of students' homes. Hickman is one of the largest high schools in Missouri and has been called the largest in terms of athletic and academic competition.
Aversives can vary from being slightly unpleasant or irritating (such as a disliked color) to physically damaging. It is not the level of unpleasantness, but rather the effectiveness the unpleasant event has on changing behavior that defines the aversive.
Intrusive thought. An intrusive thought is an unwelcome involuntary thought, image, or unpleasant idea that may become an obsession, is upsetting or distressing, and can feel difficult to manage or eliminate. When such thoughts are associated with obsessive-compulsive disorder, depression, body dysmorphic disorder, and sometimes attention-deficit hyperactivity disorder, the thoughts may become paralyzing, anxiety-provoking, or persistent. Intrusive thoughts may also be associated with episodic memory, unwanted wor