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 the protein in wheat, rye, barley, spelt, kamut, and commercial oats, and casein is the protein in dairy. Wheat and dairy sensitivities are commonplace today â and not just with autism. Nine million people have gluten intolerance in the US. There are a lot of hidden sources for allergies.