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.
Gluten sensitivity or intolerance is a condition that causes a person to react after ingesting gluten, a protein found in wheat, barley and rye. Symptoms vary widely and can include gastrointestinal problems, joint pain, fatigue and depression.luten sensitivity or intolerance is a condition that causes a person to react after ingesting gluten, a protein found in wheat, barley and rye. Symptoms vary widely and can include gastrointestinal problems, joint pain, fatigue and depression.