How Verb Tense Shapes Persuasion.

The article investigates how verb tense—specifically present versus past tense—affects the persuasiveness and perceived helpfulness of consumer communications such as online reviews and word of mouth. Across eight studies combining natural language processing of over 500,000 reviews and controlled experiments, the research finds that using present tense increases persuasion by making communicators appear more certain about their statements. This effect holds across various product categories (books, music, electronics) and services (restaurants), different platforms (Amazon, Yelp), and both positive and negative evaluations. Mediation and moderation analyses confirm that perceived certainty is the key psychological mechanism driving the increased helpfulness and persuasive impact of present-tense language. These findings have practical implications for marketers, salespeople, and consumers by highlighting a subtle linguistic feature that shapes communication effectiveness.