Professor Wiley periodically checks his results and, once his findings have reached significance, he stops data collection. Which questionable research practice has he engaged in?

Question

Quizplus · Accepted Answer

Data snooping refers to the practice of repeatedly checking data as it is collected and deciding to stop collecting data once the results appear significant, without having predetermined a specific sample size or stopping rule. This can lead to biased results and inflated type I error rates.

Professor Wiley Periodically Checks His Results And, Once His Findings