Differences between events, values, attitudes and relationships provide therapists with the most meaningful data in the search for a circular perspective. Systems change is believed to be dependent on the reception of relevant information by the system.Traditionally, information has been collected verbally and Tomm (1984) outlines a schema of the types of difference questions.However, clinical practice suggests that these questions are not suitable to all clients. Difference questions may be confusing and unproductive when working with young children whose language skills are not fully developed and auditory memory limited. Adults whose verbal skills are limited or whose primary mode for processing information is not auditory, also have difficulty.An alternative visual method for collecting news of difference is proposed, using Tomm's (1984) categories as a basis.Case examples are given of this technique, at the stage of data collection and as a way of marking and reinforcing change through the course of therapy.