The AB Design can be used to quickly assess the effects of an experimental variable. Its main disadvantage its inability to distinguish the experimental effect from possible confounds that might occur coincident with the change of condition.
ceÂ·liÂ·ac disÂ·ease. A disease occurring in children and adults characterized by sensitivity to gluten, with chronic inflammation and atrophy of the mucosa of the upper small intestine; manifestations include diarrhea, malabsorption, steatorrhea, and nutritional and vitamin deficiencies.
Celiac disease and gluten intolerance are both conditions that cause people to become sensitive to gluten, a protein found in wheat, rye and barley. Gluten intolerance is a broad term that describes a range of sensitivities to gluten.eople with celiac disease suffer from damage to their small intestines as a result of gluten consumption. The symptoms and the severity for celiac disease can range widely, and may include diarrhea or constipation, fatigue, weight loss or weight gain, general poor health, and Dermatitis Herpetiformis.