iii. Psychological measures: Visual analogue scales for measurement of severity of Anxiety, Disgust, Strength of belief in obsession, Strength of urge to carry out the compulsion, Strength of belief in theory A/B, Strength of belief in Theory A/B, Feeling of being supported, Readiness to face the fear will be used by the participant at time points as specified above. In addition to this the participant will be assessed for their clinical symptoms (YBOCS, OCI) on weekly basis as part of their standard treatment plan.