Base rate neglect occurs when people:

Base rate neglect occurs when people:

• A. Ignore relevant base rates and focus on the accuracy of the information
• B. Consider base rates too heavily when evaluating evidence
• C. Rely on memory without considering probability
• D. Overthink outcomes of rare events

Answer: (A)

Base rate neglect is the tendency to ignore how common something is in the population and instead judge a situation by how convincing the presented information appears. In this item, the description fits: people ignore the relevant base rates and focus on the apparent accuracy or strength of the information. This bias helps explain why people misinterpret probabilities after encountering diagnostic evidence—like a test result—because they overlook the prior likelihood of the condition in the population. Other options point to weighing base rates too heavily, relying on memory, or overemphasizing rare events, which are different patterns of reasoning. So the correct idea is that the base rates are neglected while the perceived strength or accuracy of the information is given more weight.

Base rate neglect is the tendency to ignore how common something is in the population and instead judge a situation by how convincing the presented information appears. In this item, the description fits: people ignore the relevant base rates and focus on the apparent accuracy or strength of the information. This bias helps explain why people misinterpret probabilities after encountering diagnostic evidence—like a test result—because they overlook the prior likelihood of the condition in the population. Other options point to weighing base rates too heavily, relying on memory, or overemphasizing rare events, which are different patterns of reasoning. So the correct idea is that the base rates are neglected while the perceived strength or accuracy of the information is given more weight.