The authors hypothesized that writing longhand about a stressful experience, compared to typing, arouses greater negative emotion. Eighty college students were randomly assigned to describe either a neutral or stressful topic by typing or writing longhand, in a 2 × 2 factorial design. Students describing the stressful topic, compared to the neutral topic, wrote for a longer period, used more words, and reported greater negative and less positive affect. Consistent with prediction, writing about a stressful experience longhand induced greater negative affect than typing, and led to more self-rated disclosure. These findings suggest a method whereby therapists can help patients control their levels of negative affect when producing a trauma narrative.