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Sean P Madden

3 papers in the library · publishing 2021-2026

Papers

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The time Collapse-Entrapment model of depersonalization severity.

Psychiatry Research June 9, 2026 Sean P Madden, Mark R Serper

Depersonalization is a disruption in self-awareness marked by a sense of detachment from one's own thoughts, body, sensory experiences, actions, and emotions. While psychological distress and temporal disturbances are known correlates, the mechanisms through which these factors contribute to symptom severity remain poorly understood. The present study proposed and tested the Time...

Smoked Cannabis Effects in Cannabis Users at Clinical High-Risk for Psychosis: A Further Investigation of Cognition and Reward

Cannabis February 22, 2022 Sean P Madden, John G Keilp, Olivia Wu et al.

Objective. Some adverse cannabis effects are greater in individuals on the psychosis spectrum compared to healthy individuals. We have previously reported that smoked cannabis acutely worsened psychotic-like states and reduced cognitive performance selectively in cannabis users at clinical high-risk (CHR) for psychosis. The objective of the present study was to further investigate the acute...

Ketamine vs Midazolam: Mood Improvement Reduces Suicidal Ideation in Depression

Journal of Affective Disorders December 1, 2021 Annabella Hochschild, J. Keilp, Seán P. Madden et al.

Objective: Studies demonstrate rapid antidepressant and anti-suicidal ideation effects of subanesthetic ketamine. The specific subcomponents of depression that are most closely tied to reduction of suicidal ideation with ketamine treatment are less explored. Methods: Exploratory, post hoc analysis of data from a randomized clinical trial of ketamine vs midazolam in patients with major...