A client reports having infrequent, but extremely disturbing, tactile hallucinations.

Self-monitoring

Explanation:

As told by Mark Synder, 'Self-monitoring' is described as the skill of observing one's own actions, emotional and behavioral patterns along with the duration for which one stays. This can be very beneficial in the evaluation of how the client responds to social situations and how it varies in distinct situations. This would allow him to locate the exact problematic areas that he suffers from and address them correctly by ensuring proper regulation and treatment through accomodating his behaviors accordingly. Thus, the best technique to gather exact information about him is 'self-monitoring.'