This document discusses the importance of clarity in test questions. Effective question writers are trained, not born. Questions should measure what is intended to avoid irrelevant difficulty and improve validity. When reading questions, test takers form mental models that influence their responses. Anxiety and time stress increase reliance on schemas and stereotypes, which can lead to misunderstanding the intent of questions. Contextualization is good if focused on salient issues but can introduce bias. Maximizing clarity involves using clear, simple language and avoiding contradicting expectations. Examples are provided of unclear question wording and steps are outlined for checking a question's clarity.