TOEFL Reading Academic Passage Practice 052Decision-Making Biases and Limited Evidence

People often imagine decision making as a process of collecting evidence and selecting the best-supported conclusion. In practice, attention and memory are limited, so people use shortcuts that usually make judgment faster. These shortcuts can be useful, but they can also produce systematic biases: predictable tendencies to give some information more weight than it deserves. A bias is not simply a mistake made by an uninformed person. It can affect experienced decision makers when the conditions that trigger it are present.

Confirmation bias occurs when people seek, notice, or remember evidence that supports an existing belief while discounting evidence that challenges it. Someone evaluating a proposal may read favorable reports closely but treat unfavorable findings as unrepresentative without equal scrutiny. The problem is not merely holding a strong opinion. It is applying different standards of evaluation to agreeable and disagreeable evidence. Deliberately identifying what evidence would change one's mind can reduce this tendency, although it cannot eliminate all disagreement about interpretation.

Other biases arise from how information is presented or retrieved. The anchoring effect describes the tendency to rely heavily on an initial number or idea when making a later judgment. An initially high price, for instance, can make a lower price seem reasonable even when the first price had little relevance to value. The availability heuristic leads people to judge events as more likely when examples come readily to mind. Vivid news coverage or a recent personal experience can make an event feel common, even if broader data indicate otherwise. Recognizing these biases does not require rejecting intuition altogether. It requires comparing initial impressions with relevant evidence, considering alternative explanations, and asking whether memorable information is also representative.