Comparison of Unified Transdiagnostic Treatment and Acceptance and Commitment Therapy in Patients with Functional Seizures

INTERVENTION: Intervention 1: Intervention group: Participants in this group will receive Unified Transdiagnostic Intervention in 12 weekly 60 minute group sessions. The intervention includes psychoeducation about emotions, emotional awareness, mindfulness training, cognitive reappraisal, reduction of emotional avoidance, modification of emotion driven behaviors, interoceptive and situational exposure, and relapse prevention. Intervention 2: Intervention group: Participants in this group will receive Acceptance and Commitment Therapy in 8 weekly 90 minute group sessions. The intervention includes acceptance of internal experiences, mindfulness training, cognitive defusion, contact with the present moment, clarification of personal values, commitment to value based actions, and modification of maladaptive behavioral patterns. Intervention 3: Control group: Participants in this group will be placed on a waitlist and will not receive any structured psychological intervention from the research team during the study period. They will continue receiving routine medical care only. After completion of data collection, they will be offered one of the therapeutic interventions. CONDITION: F44.5 Functional Seizure Disorder. ; Conversion disorder with seizures or convulsions PRIMARY OUTCOME: Experiential avoidance score in individuals with functional seizures. Timepoint: Before the intervention, immediately after completion of the intervention, and three months after the intervention. Method of measurement: Multidimensional Experiential Avoidance Questionnaire. Interpretive bias score in individuals with functional seizures. Timepoint: Before the intervention, immediately after completion of the intervention, and three months after the intervention. Method of measurement: Ambiguous Scenarios Test for Depression. Sensory processing sensitivity score in individuals with functional seizures. Timepoint: Before the intervention, immediately after completion of the intervention, and three months after the intervention. Method of measurement: Aron and Aron Sensory Processing Sensitivity Questionnaire. INCLUSION CRITERIA: Diagnosis of functional seizure disorder by a psychiatrist or neurologist Age between 18 and 55 years Stable medication regimen during the past three months Ability to read and write Persian Providing informed consent for participation