Parapsychology
Anchoring and Adjustment is a type of heuristic in which a person makes an educated guess about a question. Then, when that person learns new information they adjust their answer around their original guess. Psychologists Amos Tversky and Daniel Kahneman first discovered this type of heuristic. In one of their first studies on Anchoring and Adjustment they gave divided participants into two groups, gave them one of two problems and asked them to guess the answer.