An eating disorder is a mental disorder defined by abnormal eating behaviors that negatively affect a person's physical or mental health. Only one eating disorder can be diagnosed at a given time. Types of eating disorders include binge eating disorder, where the patient eats a large amount in a short period of time; anorexia nervosa, where the person has an intense fear of gaining weight and restricts food or overexercises to manage this fear; bulimia nervosa, where individuals eat a large quantity (binging) then try to rid themselves of the food (purging); pica, where the patient eats non-food items; rumination syndrome, where the patient regurgitates undigested or minimally digested food; avoidant/restrictive food intake disorder (ARFID), where people have a reduced or selective food intake due to some psychological reasons ; and a group of other specified feeding or eating disorders. Anxiety disorders, depression and substance abuse are common among people with eating disorders. These disorders do not include obesity. People often experience comorbidity between an eating disorder and OCD. It is estimated 20-60% of patients with an ED have a history of OCD.
Adolescence is a transitional stage of physical and psychological development that generally occurs during the period from puberty to adulthood. Adolescence is usually associated with the teenage years, but its physical, psychological or cultural expressions may begin earlier and end later. Puberty now typically begins during preadolescence, particularly in females. Physical growth and cognitive development can extend past the teens. Age provides only a rough marker of adolescence, and scholars have not agreed upon a precise definition. Some definitions start as early as 10 and end as late as 25 or 26. The World Health Organization definition officially designates an adolescent as someone between the ages of 10 and 19.
Self-esteem is confidence in one's own worth or abilities. Self-esteem encompasses beliefs about oneself as well as emotional states, such as triumph, despair, pride, and shame. Smith and Mackie (2007) defined it by saying "The self-concept is what we think about the self; self-esteem, is the positive or negative evaluations of the self, as in how we feel about it."
Bulimia nervosa, also known as simply bulimia, is an eating disorder characterized by binge eating followed by purging or fasting, and excessive concern with body shape and weight. The aim of this activity is to expel the body of calories eaten from the binging phase of the process. Binge eating refers to eating a large amount of food in a short amount of time. Purging refers to the attempts to get rid of the food consumed. This may be done by vomiting or taking laxatives.
In sociology, a peer group is both a social group and a primary group of people who have similar interests (homophily), age, background, or social status. The members of this group are likely to influence the person's beliefs and behaviour.
Disordered eating describes a variety of abnormal eating behaviors that, by themselves, do not warrant diagnosis of an eating disorder.
Claude Mason Steele is a social psychologist and emeritus professor at Stanford University, where he is the I. James Quillen Endowed Dean, Emeritus at the Stanford Graduate School of Education, and Lucie Stern Professor in the Social Sciences, Emeritus.
Roy F. Baumeister is an American social psychologist who is known for his work on the self, social rejection, belongingness, sexuality and sex differences, self-control, self-esteem, self-defeating behaviors, motivation, aggression, consciousness, and free will.
Marc D. Hauser is an American evolutionary biologist and a researcher in primate behavior, animal cognition and human behavior and neuroscience. Hauser was a professor of psychology at Harvard University from 1998 to 2011. In 2010 Harvard found him guilty of research misconduct, specifically fabricating and falsifying data, after which he resigned. Because Hauser's research was financed by government grants, the Office of Research Integrity of the Health and Human Services Department also investigated, finding in 2012 that Hauser had fabricated data, manipulated experimental results, and published falsified findings.
Ego depletion is the idea that self-control or willpower draws upon a limited pool of mental resources that can be used up. When the energy for mental activity is low, self-control is typically impaired, which would be considered a state of ego depletion. In particular, experiencing a state of ego depletion impairs the ability to control oneself later on. A depleting task requiring self-control can have a hindering effect on a subsequent self-control task, even if the tasks are seemingly unrelated. Self-control plays a valuable role in the functioning of the self on both individualistic and interpersonal levels. Ego depletion is therefore a critical topic in experimental psychology, specifically social psychology, because it is a mechanism that contributes to the understanding of the processes of human self-control. There have both been studies to support and to question the validity of ego-depletion as a theory.
Lyn Yvonne Abramson is a professor of psychology at the University of Wisconsin–Madison. She was born in Benson, Minnesota. She took her undergraduate degree at the University of Wisconsin–Madison in 1972 before attaining her Ph.D. in clinical psychology at University of Pennsylvania in 1978.
Noah Levine is an American Buddhist teacher and author, son of American Buddhist teacher and poet Stephen Levine. As a counselor known for his philosophical alignment with Buddhism and punk ideology, he identifies his Buddhist beliefs and practices with both the Theravada and Mahayana traditions. He has written several books on Buddhism and Buddhist practice including Refuge Recovery: A Buddhist Path to Recovering from Addiction.
Purging disorder is an eating disorder characterized by the DSM-5 as self-induced vomiting, or misuse of laxatives, diuretics, or enemas to forcefully evacuate matter from the body. Purging disorder differs from bulimia nervosa (BN) because individuals do not consume a large amount of food before they purge. In current diagnostic systems, purging disorder is a form of other specified feeding or eating disorder. Research indicates that purging disorder, while not rare, is not as commonly found as anorexia nervosa or bulimia nervosa. This syndrome is associated with clinically significant levels of distress, and that it appears to be distinct from bulimia nervosa on measures of hunger and ability to control food intake. Some of the signs of purging disorder are frequent trips to the bathroom directly after a meal, frequent use of laxatives, and obsession over one's appearance and weight. Other signs include swollen cheeks, popped blood vessels in the eyes, and clear teeth which are all signs of excessive vomiting.
In psychology, impulsivity is a tendency to act on a whim, displaying behavior characterized by little or no forethought, reflection, or consideration of the consequences. Impulsive actions are typically "poorly conceived, prematurely expressed, unduly risky, or inappropriate to the situation that often result in undesirable consequences," which imperil long-term goals and strategies for success. Impulsivity can be classified as a multifactorial construct. A functional variety of impulsivity has also been suggested, which involves action without much forethought in appropriate situations that can and does result in desirable consequences. "When such actions have positive outcomes, they tend not to be seen as signs of impulsivity, but as indicators of boldness, quickness, spontaneity, courageousness, or unconventionality" Thus, the construct of impulsivity includes at least two independent components: first, acting without an appropriate amount of deliberation, which may or may not be functional; and second, choosing short-term gains over long-term ones.
Anorexia nervosa, often referred to simply as anorexia, is an eating disorder characterized by low weight, food restriction, body image disturbance, fear of gaining weight, and an overpowering desire to be thin. Anorexia is a term of Greek origin: an- and orexis, translating literally to "a loss of appetite"; the adjective nervosa indicating the functional and non-organic nature of the disorder. Anorexia nervosa was coined by Gull in 1873 but, despite literal translation, the feeling of hunger is frequently present and the pathological control of this instinct is a source of satisfaction for the patients.
M. Lynne Cooper is the Curators' Distinguished Professor of Psychology at the University of Missouri. She is known for her research on risk-taking and psychological adjustment of adolescents, young adults, and couples. Many of her studies and published works are related to alcohol, substance use, and sexual activity in adolescents and young adults at the transition to adulthood. Other influential research has examined health outcomes of parents who experience stress due to conflicts between work and family responsibilities.
Jeffrey T. Parsons is an American psychologist, researcher, and educator; he was a Distinguished Professor of Psychology at Hunter College and The Graduate Center of the City University of New York (CUNY) and was the Director of Hunter College's Center for HIV/AIDS Educational Studies & Training, which he founded in 1996. Parsons was trained as a developmental psychologist and applied this training to understand health, with a particular emphasis on HIV prevention and treatment. He was known for his research on HIV risk behaviors of gay, bisexual, and other men who have sex with men (GBMSM), HIV-related syndemics, and sexual compulsivity. He resigned his positions at CUNY on July 3, 2019, following a year-long university investigation of misconduct allegations against him.
Valerie F. Reyna is an American psychologist and Professor of Human Development at Cornell University and an expert on false memory and risky decision making.
Adriana Galván is an American psychologist and expert on adolescent brain development. She is a professor of psychology at the University of California, Los Angeles (UCLA) where she directs the Developmental Neuroscience laboratory. She was appointed the Jeffrey Wenzel Term Chair in Behavioral Neuroscience and the Dean of Undergraduate Education at UCLA.
Abigail Marsh is a psychologist and neuroscientist who works as a professor at Georgetown University's Department of Psychology and the Interdisciplinary Neuroscience Program, where she is the director of the Laboratory on Social and Affective Neuroscience.
