Tom Østergaard

• Østergaard, Tom; Lundgren, Tobias; Zettle, Robert; Landrø, Nils Inge & Haaland, Vegard Øksendal (2020). Psychological Flexibility in Depression Relapse Prevention: Processes of Change and Positive Mental Health in Group-Based ACT for Residual Symptoms. Frontiers in Psychology. ISSN 1664-1078. 11. doi: 10.3389/fpsyg.2020.00528. Full text in Research Archive
• Østergaard, Tom; Lundgren, Tobias; Zettle, Robert; Landrø, Nils Inge & Haaland, Vegard Øksendal (2020). Norwegian Acceptance and Action Questionnaire (NAAQ): A psychometric evaluation. Journal of Contextual Behavioral Science. ISSN 2212-1447. 15, p. 103–109. doi: 10.1016/j.jcbs.2019.12.002. Full text in Research Archive
• Østergaard, Tom; Lundgren, Tobias; Rosendahl, Ingvar; Zettle, Robert; Jonassen, Rune & Harmer, Catherine [Show all 9 contributors for this article] (2019). Acceptance and Commitment Therapy Preceded by Attention Bias Modification on Residual Symptoms in Depression: A 12-Month Follow-Up. Frontiers in Psychology. ISSN 1664-1078. 10, p. 1–13. doi: 10.3389/fpsyg.2019.01995. Full text in Research Archive Show summary

  Depression is a highly recurrent disorder with limited treatment alternatives for reducing risk of subsequent episodes. Acceptance and commitment therapy (ACT) and attention bias modification (ABM) separately have shown some promise in reducing depressive symptoms. This study investigates (a) if group-based ACT had a greater impact in reducing residual symptoms of depression over a 12-month follow-up than a control condition, and (b) if preceding ACT with ABM produced added benefits. This multisite study consisted of two phases. In phase 1, participants with a history of depression, currently in remission (N = 244), were randomized to either receive 14 days of ABM or a control condition. In phase 2, a quasi- experimental design was adopted, and only phase-1 participants from the Sørlandet site (N = 124) next received an 8-week group-based ACT intervention. Self-reported and clinician-rated depression symptoms were assessed at baseline, immediately after phase 1 and at 1, 2, 6, and 12 months after the conclusion of phase 1. At 12-month follow-up, participants who received ACT exhibited fewer self-reported and clinician-rated depressive symptoms. There were no significant differences between ACT groups preceded by ABM or a control condition. There were no significant differences between ACT groups preceded by ABM or a control condition. Group-based ACT successfully decreased residual symptoms in depression over 12 months, suggesting some promise in preventing relapse.

• Østergaard, Tom; Lundgren, Tobias; Zettle, Robert; Jonassen, Rune; Harmer, Catherine & Stiles, Tore C [Show all 8 contributors for this article] (2018). Acceptance and Commitment Therapy preceded by an experimental Attention Bias Modification procedure in recurrent depression: Study protocol for a randomized controlled trial. Trials. ISSN 1745-6215. 19(203), p. 1–12. doi: 10.1186/s13063-018-2515-9. Full text in Research Archive

View all works in Cristin

• Østergaard, Tom; Lundgren, Tobias; Rosendahl, Ingvar; Zettle, Robert D.; Jonassen, Rune & Harmer, Catherine [Show all 9 contributors for this article] (2023). Corrigendum: Acceptance and commitment therapy preceded by attention bias modification on residual symptoms in depression: a 12-month follow-up (Frontiers in Psychology, (2019), 10, (1995), 10.3389/fpsyg.2019.01995). Frontiers in Psychology. ISSN 1664-1078. 14. doi: 10.3389/fpsyg.2023.1233621.

View all works in Cristin