The words parents use when disclosing their current thoughts and feelings about their children's cancer were hypothesized to be associated with post-traumatic stress symptomatology among parents of children who had successfully completed treatment. A word-based, computerized text-analysis program was used to analyze writing samples from 82 parents. Parents completed a questionnaire and a structured interview assessing post-traumatic stress symptomatology. Results indicate partial support for the association between language use and post-traumatic stress symptoms. Use of past-tense verbs was associated with fewer traumatic stress symptoms, and use of future-tense verbs was associated with more traumatic stress symptoms. Time since completion of the child's treatment moderated the relationship between use of past- and future tense verbs and post-traumatic stress symptoms. Implications for using computer-based text analyses in the study of psychological processes associated with post-traumatic responses are discussed.