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.
Your tongue can also swell and burn due to certain types of anemia, such as seen with iron deficiency and vitamin B12 deficiency. The condition may also be as a result of other factors, such as general lifestyle, diet, allergies and other environmental factors. It might also be as a result of ingesting hot foods or drinking overly hot drinks as this can physically burn the tongue and cause long-lasting irritation.