To evaluate a program designed to improve math scores for elementary school girls, girls were divided into treatment and control groups. Girls in the treatment group were required to attend an after-school program, while girls in the control group went home on time. Math exam scores were then compared between the two groups of girls. This type of program design is associated with:

When were criminals first used to create a system to catch other criminals

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Annette suffers from recurrent episodes of gorging on large quantities of food followed bypurging through self-induced vomiting in order to prevent gaining weight. although her weight is well below normal to the point that others see her as "skin and bones," she worries excessively about being fat. she also has impulse control problems in other areas of her life.she is suffering from ) binge-eating/purging anorexia2) restrictive anorexia3) bulimia nervosa 4) binge-eating disorder