A highlighter test lets users highlight words in different colors based on how they feel about them. For instance, they may mark words that evoke confidence in green and those that cause anxiety in red. This test, often used early in design, helps assess assumptions and the tone of the copy.^[1]

The results allow you to gauge if the writing aligns with brand personality and meets business goals, pinpointing areas for improvement. For cost-effective, remote testing, users can highlight text in a shared Google Doc or Word document. However, unmoderated testing may reduce honesty and rapport, especially for users with low digital literacy.