Please note that this talk is at 11am-12pm Australian Eastern Standard Time.
\nDescription: \;Investigating psychotic-like experiences in non-clinical populations can aid our understanding of how and why altered perceptual experiences arise in psychosis. Conflicting Bayesian theories postulate aberrations in either top-down or bottom-up processing. On one hand\, psychotic-like experiences might arise due to an overreliance on current sensory information in one&rsquo\;s environment with a reduced regard for prior context during perceptual decision making. Alternatively\, this might be due to an overreliance on contextual information such as prior beliefs and expectations. In this talk\, I will outline our research where we empirically adjudicate between these hypotheses\, using a perceptual decision-making task in which the uncertainty of prior beliefs and sensory information is manipulated. We found that people with greater psychotic-like experiences relied more on sensory information relative to prior expectations across the task. This was driven by the perception of greater uncertainty or unreliability associated with prior information. Psychotic-like experiences were also associated with a general perception of greater task instability\, which unifies these conflicting hypotheses. Our findings show that alterations in belief updating extend into the non-clinical continuum of psychotic-like experiences\, which provides important utility in understanding the continuum of psychosis.
\nZoom link: \;https://monash.zoom.us/j/84663747139?pwd=OWZiajBnZHRVMS9SR2I3NVk5QkpkZz09
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