IQ tests and screening tools reliability: IQ tests typically have ____ internal reliability and screening measures like MMSE or MoCA typically have ____ internal reliability.

• A. Low, high
• B. High, low
• C. Moderate, low
• D. Moderate, high

Answer: (B)

Internal reliability is about how consistently the items on a test measure the same underlying construct. IQ tests are designed with many items that collectively assess general intelligence, so they tend to show very high internal reliability because the items cohere well around the same construct. Screening measures like MMSE or MoCA use far fewer items and cover multiple cognitive domains, which makes their items less uniformly aligned. That breadth and brevity typically yield lower internal reliability, even though these tools can be reliable enough for screening purposes. So the best fit is high internal reliability for IQ tests and lower internal reliability for the screening tools.