Abnormal Psychology - Lecture Six Flashcards
Eating Disorders, including requirements, aetiologies and treatments
Mortality rate of anorexia nervosa
10-15%
Percent of adolescence that meet the criteria for one or more eating disorders
12%
Continuum of eating disorders
Weight, restrictive eating, binge-eating and purging/compensating
DSM-5 Diagnoses
Anorexia Nervosa, Bulimia Nervosa, Binge-Eating Disorder, Avoidant/Restrictive Food intake disorder and Other Specified Eating Disorder
Diagnostic features of Anorexia Nervosa
Restriction of energy intake relative to requirements, leading to a significantly low body weight
Intense fear of gaining weight or becoming fat, even though underweight
Disturbance in the way in which one’s body weight or shape is experienced
Two types of Anorexia Nervosa
Restricting Type: no bingeing or purging
Binge-eating/purging type: with regular binging or purging
Diagnostic features of Bulimia Nervosa
Recurrent binge eating with a sense of lack of control
Recurrent inappropriate compensatory behaviour in order to prevent weight gain e.g. excessive exercise, binge purging
Binge eating and compensatory behaviour occur at least once a week for three months
Self-evaluation is unduly influenced by body shape and weight
Associated features of Bulimia Nervosa
Individuals are usually within the normal weight or overweight range
Between binges individuals typically restrict caloric intake
Low self-esteem
Low mood/depression
High rates of smoking (reduces appetite)
Higher rates of substance abuse (impulse control difficulties)
Symptoms of binge-eating disorder
Recurrent binges (2x week, at least 6 months)
Also, 3 or more of following:
Eating more rapidly than normal
Eating until uncomfortable full
Binging when not hungry
Eating alone due to embarrassment
Feeling disgusted, depressed, guilty after overeating
Other diagnostic features of binge-eating disorder
Self-evaluation unduly influenced by body size and shape
BED does not involve regular use of inappropriate compensatory behaviours
Aetiology of eating disorders (AN and BN)
Biological factors
Sociocultural factors
Psychological factors
The more factors, the greater the risk of developing the eating disorder
Biological factors
Genetic influences, neurotransmitters and hormones
Genetic influences
High concordance rates, relatives of people with an eating disorder are 6 x more likely to develop an eating disorder
Neurotransmitters
Serotonin and norepinephrine
Low levels of serotonin doesn’t cause mental illnesses, but can influence the development the development due to the relation of serotonin and mood stabilisation
Hormones
Anorexia Nervosa can cause deficiency in hypothalamus functioning- weight set point