Effectiveness of psychotherapies that engage with the voices of Voice Hearers: a systematic review protocol.

The objective of this review is to identify, evaluate and synthesize relevant research on the effectiveness of psychotherapies that engage Voice Hearers with their voices in order to change the person's quality of life, recovery, coping and distress. More specifically, the objective is to ascertain the effectiveness of this type of intervention with or without any other co-intervention, either pharmacological or non-pharmacological, compared to treatment as usual, for people from a Western or European culture aged 18-65 years who hear voices, regardless of ethnicity.