Targeting Individual Alpha Frequencies to Enhance Perceptual Timing

You may not qualify if:

• History of seizures or epilepsy
• Metallic cranial plates, screws, or implanted devices
• History of craniotomy
• History of stroke
• History of eczema on scalp
• Pre-existing sores or lesions at sites of tACS electrode placement
• Non-removable facial piercings
• Current or possibility of current pregnancy
• Active suicidal ideation at screening or baseline assessments, or previous intent to act on suicidal ideation with a specific plan, preparatory acts, or an actual suicide attempt within the last 3 months, as indicated by the MINI and/or C-SSRS (All participants will complete the suicide module of the MINI. If participants express any suicidal ideation on the MINI, staff will complete the C-SSRS \[Columbia-Suicide Severity Rating Scale\].)
• WTAR (Wechsler Test of Adult Reading) standardized score below 70
• Any reason our tCS (transcranial stimulation) or EEG caps cannot be placed on their head
• Control Participants:
• Are age 18-64 (inclusive)
• Fluent in written and spoken English
• Meet diagnostic criteria for a psychotic disorder (schizophrenia, schizoaffective disorder, schizophreniform disorder, major depressive disorder with psychotic features, bipolar disorder with psychotic features, psychosis disorder not otherwise specified, or unspecified schizophrenia spectrum disorder), as defined by the MINI
• +12 more criteria