Deanna M Barch1, Diana Whalen2, Kirsten Gilbert2, Danielle Kelly2, Emily S Kappenman3, Greg Hajcak4, Joan L Luby2. 1. Department of Psychological & Brain Sciences, Washington University in St. Louis, St. Louis, Missouri; Department of Psychiatry, Washington University in St. Louis, St. Louis, Missouri; Department of Radiology, Washington University in St. Louis, St. Louis, Missouri. 2. Department of Psychiatry, Washington University in St. Louis, St. Louis, Missouri. 3. Department of Psychology, San Diego State University, San Diego, California. 4. Department of Biomedical Science and Psychology, Florida State University, Tallahassee, Florida.
Abstract
BACKGROUND:Early childhood depression is associated with anhedonia and reduced event-related potential (ERP) responses to rewarding or pleasant stimuli. Whether these neural measures are indicators of target engagement or treatment outcome is not yet known. METHODS: We measured ERP responses to win and loss feedback in a guessing task and to pleasant versus neutral picturesin young (4.0-6.9 years of age) depressed children before and after randomization to either 18 weeks of Parent-Child Interaction Therapy-Emotion Development (PCIT-ED) treatment or waitlist (WL) control condition. RESULTS: Analyses included reward positivity (RewP) data from 118 children randomized to PCIT-ED treatment (n = 60) or WL control condition (n = 58) at baseline and late positive potential (LPP) data from 99 children (44 PCIT-ED treatment vs. 55 WL control condition) at baseline. Children in the PCIT-ED group showed a greater reduction in anhedonia (F1,103 = 10.32, p = .002, partial η2 = .09). RewP reward responses increased more (F1,87 = 5.45, p = .02, partial η2 = .06) for PCIT-ED and a greater change in RewP was associated with a greater reduction in major depressive disorder symptoms (r = -.24, p = .05). Baseline RewP did not predict treatment change. LPPs to positive pictures did not change across treatment, but greater baseline LPPs to positive pictures predicted a higher likelihood of remission from major depressive disorder in the PCIT-ED group (B = 0.14; SE = 0.07; odds ratio = 1.15; p = .03). CONCLUSIONS: The ERP reward response improved in young children with depression during a treatment designed to enhance emotion development, providing evidence of target engagement of the neural systems associated with reward. Further, greater baseline LPP responses to positive pictures were associated with a greater reduction in depression, suggesting that this ERP measure can predict which children are most likely to respond to treatment.
RCT Entities:
BACKGROUND: Early childhood depression is associated with anhedonia and reduced event-related potential (ERP) responses to rewarding or pleasant stimuli. Whether these neural measures are indicators of target engagement or treatment outcome is not yet known. METHODS: We measured ERP responses to win and loss feedback in a guessing task and to pleasant versus neutral pictures in young (4.0-6.9 years of age) depressed children before and after randomization to either 18 weeks of Parent-Child Interaction Therapy-Emotion Development (PCIT-ED) treatment or waitlist (WL) control condition. RESULTS: Analyses included reward positivity (RewP) data from 118 children randomized to PCIT-ED treatment (n = 60) or WL control condition (n = 58) at baseline and late positive potential (LPP) data from 99 children (44 PCIT-ED treatment vs. 55 WL control condition) at baseline. Children in the PCIT-ED group showed a greater reduction in anhedonia (F1,103 = 10.32, p = .002, partial η2 = .09). RewP reward responses increased more (F1,87 = 5.45, p = .02, partial η2 = .06) for PCIT-ED and a greater change in RewP was associated with a greater reduction in major depressive disorder symptoms (r = -.24, p = .05). Baseline RewP did not predict treatment change. LPPs to positive pictures did not change across treatment, but greater baseline LPPs to positive pictures predicted a higher likelihood of remission from major depressive disorder in the PCIT-ED group (B = 0.14; SE = 0.07; odds ratio = 1.15; p = .03). CONCLUSIONS: The ERP reward response improved in young children with depression during a treatment designed to enhance emotion development, providing evidence of target engagement of the neural systems associated with reward. Further, greater baseline LPP responses to positive pictures were associated with a greater reduction in depression, suggesting that this ERP measure can predict which children are most likely to respond to treatment.
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