Which of the following is NOT used to describe client speech in a mental status exam?

• A. Lability
• B. Fluency
• C. Rate
• D. Volume

Answer: (A)

In a mental status exam, how someone speaks is described using fluency, rate, and volume. Fluency refers to the smoothness and flow of speech—are there hesitations, stuttering, or word-finding problems that disrupt speech? Rate describes how fast or slow the person talks, such as rapid or slowed speech. Volume covers how loud or soft the speech is and whether it changes. Lability, however, describes affective expression—emotional volatility or rapid shifts in mood. You might note that a person’s affect is labile if their emotions swing quickly (laughing then crying), which is an affective description, not a characteristic of speech production. So lability is not used to describe client speech in the mental status exam.