In practice, the client/patient is shown a series of ink-blot type patterns which are regarded as ambiguous stimuli. The ambiguity allows a variety of different interpretations to be put on them, and features selected from them. The client/ patient is encouraged to talk about what he or she sees in the patterns, and the therapist uses these responses as clues to unconscious or difficult-to-voice concerns which can then be explored. A scoring system has been developed through observations made on various clinical and normal groups, but scoring is still necessarily subjective and interpretation of the responses is regarded as a skilled activity, requiring much experience.