Composing is controlled by information feedback from prior behavior which serves to influence future behavior. This model posits movement toward a desired end product through a continual interchange of writing and examining and evaluating what has been written against internal standards. A study was conducted to determine the extent to which interrupting feedback (by taking away visual access to what has been written) affects the writing of experienced, good writers and inexperienced, poorer writers. Writing was reviewed on both the sentence level and in terms of overall quality. Two groups of nine students were asked to write two essays, one with standard ink and the other with invisible ink. Results indicate that when writing under conditions of interrupted feedback, the subjects produced essays which differed from those produced under normal circumstances. Feedback disruption interfered only with one level of processing: discourse production. No apparent difficulty was experienced in producing well-formed, relatively error-free sentences with feedback either present or absent. This suggests that both inexperienced and experienced writers have internalized a writing style which can be produced automatically in a timed writing situation in response to a given topic. (JK)