Vandervert (1980/1988) described in scientific detail a simple, every day illustration of an operational definition in terms of making a cake (i.e., its recipe is an operational definition used in a specialized laboratory known as the household kitchen).andervert (1980/1988) described in scientific detail a simple, every day illustration of an operational definition in terms of making a cake (i.e., its recipe is an operational definition used in a specialized laboratory known as the household kitchen).
In addition, a swollen tongue can be caused by: 1  Hormonal disorders such as acromegaly. 2  Congenital disorders such as Beckwith Wiedemann syndrome. 3  Genetic disorders such as Down syndrome and hereditary angioedema. 4  Hypothyroidism, an underactive thyroid. 5  Poor vitamin B12 absorption. 6  Pituitary gland disorder.
A: The most common cause of new or come-and-go tongue swelling (or swelling of the lip or throat) is a type of allergic reaction called angioedema.. Sudden tongue swelling can sometimes be dangerous because it could block your airway.Two types of angioedema can lead to a swollen tongue: 1.f the tongue is so swollen that it's obstructing the airway, a breathing tube may need to be placed temporarily. 2. Angioedema from other causes. In some forms of angioedema, a body chemical called bradykinin causes the tongue swelling. Tongue and mouth swelling is usually the only symptom.