cCenter for Cognitive Neuroimaging, (CCNi),Department of Psychology,University of Glasgow,Glasgow,UK Correspondence and requests for reprints to Guylaine Be ¤ lizaire,MSc, Laboratoire de Neurocognition vocale,De ¤ partement de Psychologie,

We evaluated theresponse of thevoice-selective areas of the audi-tory cortex to sound ‘voiceness’, that is, the degree to which an auditory stimulus resembles human voice. Normal participants were scanned using event-related functional magnetic resonance imagingwhile passively listening to stimuli drawn from a‘voiceness’ continuum generated via auditory morphing between sounds of voice and sounds of musical instruments.The voice-selective areas of the left and right superior temporal sulcus did not show the expected relation between ‘voiceness ’ and size e¡ect. Instead, superior temporal sulcus activity seemed mostly driven by sound naturalness, with largest activity di¡erences observed for the intermediate, voice-instrument hybrid stimuli. NeuroRepor