Kavli Affiliate: David Linden
| Authors: Suvarnalata Xanthate Duggirala, Hanna Honcamp, Michael Schwartze, Therese Amelsvoort, Ana Pinheiro, David Linden and Sonja A Kotz
| Summary:
Altered sensory feedback processing and attention control are assumed to contribute to auditory verbal hallucinations, which are experienced by the general population and patients with psychosis, implying a continuum of hallucination proneness (HP). However, the interaction of altered sensory feedback processing and attention control along this HP continuum remains unclear. Manipulating the level of certainty of sensory feedback by changing self-voice quality (100% neutral, 60-40% neutral-angry, 50-50% neutral-angry, 40-60% neutral-angry, 100% angry) in individuals varying in HP, we tested this interaction using electroencephalography while participants self-generated or passively listened to their voices. Regardless of voice quality, HP modulated the N100 and P200 suppression effects. High HP individuals showed an increased N100 response to the self-generated voices and an increased P200 response for externally-generated voices. This may indicate increased error awareness and attention allocation in high HP individuals for self-voice generation stemming from altered sensory feedback processing, and/or attentional control. The current findings suggest that alterations of the sensory feedback processing in self-voice production are a fundamental characteristic of the continuum of HP, regardless of the clinical status of voice hearers.