Norman D. B. Tversus

Norman D. B. Tversus is not a widely recognized figure or term in common knowledge or scholarly sources. It’s possible there’s a typo or confusion. If you meant "Norman D. B. Tversky," you may be referring to Amos Tversky, a renowned cognitive psychologist known for research on decision-making and cognitive biases. Please clarify or provide more context so I can assist you accurately.