TRICHOPHAGY Trichophagy, derived from the Greek words thrix (hair) and phagein (to eat), is formally defined as the compulsive, recurring action of biting, chewing, and subsequently ingesting one’s own hair. This behavior is classified within the broader category of Body-Focused Repetitive Behaviors (BFRBs), a group of self-grooming habits that cause physical damage or distress and […]
Definition and Historical Context of Parorexia Parorexia refers to a clinical condition characterized by a persistent and compulsive desire to ingest substances that are largely or entirely non-nutritive. This pathological drive compels the individual to consume atypical foods or compounds that offer no caloric or nutritional benefit, and often pose significant risks to physiological health. […]
Definition and Etymology Allotriophagy, derived from the Greek roots *allotrios* meaning ‘strange’ or ‘foreign,’ and *phagein* meaning ‘to eat,’ describes the persistent, compulsive drive to consume substances that are fundamentally non-food, non-nutritive, and often hazardous. This condition is formally recognized within clinical psychology and psychiatry as a distinct feeding and eating disorder. The core definition […]
Defining Adjunctive Behavior in Experimental Psychology Adjunctive behavior, often referred to as schedule-induced behavior, represents a class of seemingly non-functional, yet highly organized and stereotypic activities that emerge reliably following the presentation of a reinforcer, typically during the interval between scheduled reinforcements. This phenomenon stands distinct from simple operant conditioning responses, which are directly elicited […]
Feeding and Eating Disorders of Infancy and Early Childhood The Core Definition and Scope The category of feeding and eating disorders of infancy and early childhood encompasses a range of pathological behaviors characterized by persistent disturbances in eating or feeding that result in altered consumption or absorption of nutrients. These disturbances typically manifest during the […]