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 is a protein found naturally in wheat, rye, and barley. Gluten intolerance is an adverse reaction to gluten. Symptoms of gluten intolerance may be varied and come on slowly over a period of time, thus making it hard to pinpoint, like many food intolerances.hat may surprise you is that many people with gluten sensitivity or celiac disease also experience other non-gastrointestinal symptoms that seem unrelated, such as. 1  Anemia. 2  Weight Loss or Weight Gain. 3  Canker sores. 4  Aching joints. 5  Depression. 6  Fatigue. 7  Itchy skin. 8  Rash or hives. 9  Headaches.