Author Archives: samweiss

Diagnosis and symptom severity in schizophrenia are associated with irregularities across neural oscillatory frequency bands, including theta, alpha, beta, and gamma. However, electroencephalographic signals consist of both periodic and aperiodic activity characterized by the (1/fX) shape in the power spectrum. In this paper, we investigated oscillatory and aperiodic activity differences...

In this study involving recent trauma-exposed civilians, researchers aimed to understand the complex relationship between substance use, posttraumatic stress disorder (PTSD), and depression. They utilized a large multisite dataset and tracked alcohol and cannabis use trajectories as well as PTSD and depression symptoms over a span of 3 months. The...

Evidence was insufficient to draw conclusions about the benefits or harms of anxiety screening programs. However, clear evidence exists that treatment for anxiety is beneficial, and more limited evidence indicates that some anxiety screening instruments have acceptable accuracy to detect generalized anxiety disorder.

EEG signals consist of both periodic and aperiodic activity, characterized by the (1/fX) shape in the power spectrum but the utility of this activity has not been examined in a task between schizophrenia patients and healthy control participants. We discovered that the steepness of the power spectrum better-predicted group status...

This study used to simultaneous PET-MR to detect reduced striatal dopamine functioning during reward processing and blunted mesocorticolimbic network functional connectivity in a transdiagnostic sample with clinically significant anhedonia.