Printer-friendly version Can peer-tutored psychological flexibility training facilitate physical activity among adults with overweight? (Pages 1-11) Acceptance and values clarification versus cognitive restructuring and relaxation: A randomized controlled trial of ultra-brief non-expert-delivered coaching interventions for social resilience (Pages 12-21) The Multidimensional Psychological Flexibility Inventory (MPFI): Discriminant validity of psychological flexibility with distress (Pages 22-29) Comprehensive assessment of Acceptance and Commitment Therapy processes (CompACT): Measure refinement and study of measurement invariance across Portuguese and UK samples (Pages 30-36) Predicting personal protective equipment use, trauma symptoms, and physical symptoms in the USA during the early weeks of the COVID-19 lockdown (April 9–18, 2020) (Pages 37-47) Intolerance of uncertainty and psychological symptoms among people with a missing loved one: Emotion regulation difficulties and psychological inflexibility as mediators (Pages 48-56) Italian validation of the Italian multidimensional psychological flexibility inventory (MPFI) (Pages 57-65) A trauma-focused intensive outpatient program integrating elements of exposure therapy with acceptance and commitment therapy: Program development and initial outcomes (Pages 66-72) Adverse childhood experiences and adult psychopathological symptoms: The moderating role of dispositional mindfulness (Pages 73-79) Relating, orienting and evoking functions in an IRAP study involving emotional pictographs (emojis) used in electronic messages (Pages 80-87) Self and rules in a sample of adults experiencing homelessness: Relationships to shame, well-being, and psychological inflexibility (Pages 88-97) Relationship between psychological flexibility and work-related quality of life for healthcare professionals: A systematic review and meta-analysis (Pages 98-112) Spanish adaptation of the Awareness, Courage and Responsiveness Scale: Preliminary psychometric properties in non-clinical samples (Pages 113-120) Assessment methods in single case design studies of psychological treatments for chronic pain: A scoping review (Pages 121-135) Investigating cognitive fusion, mindfulness and experiential avoidance in relation to psychosis-like symptoms in the general population (Pages 136-143) An examination of transformation of evaluative and consequential functions through derived relations with participant-generated values-relevant stimuli (Pages 144-157) Acceptance-based telephone support around the time of transition to secondary progressive multiple sclerosis: A feasibility randomised controlled trial (Pages 158-170) Resilience mediates the cross-sectional relationship between mindfulness and positive mental health in early adolescence (Pages 171-175) Aggressiveness in patients with obsessive-compulsive disorder as assessed by the Implicit Relational Assessment Procedure (Pages 176-186) Does it help to talk about it? Co-rumination, internalizing symptoms, and committed action during the COVID-19 global pandemic (Pages 187-195) Exploring the addition of self-compassion skills training to a behavioral weight loss program delivered using video conferencing software (Pages 196-202) Roads less travelled to self-forgiveness: Can psychological flexibility overcome chronic guilt/shame to achieve genuine self-forgiveness? (Pages 203-211) Does Cognitive Fusion show up similarly across two behavioral health samples? Psychometric properties and invariance of the Greek–Cognitive Fusion Questionnaire (G-CFQ) (Pages 212-221) Corrigendum to “In search of scope: A response to Ruiz et al. (2020)” [Journal of Contextual Behavioral Science 18 (2020) 306–311] (Page 222) Erratum Regarding Previously Published Articles in Volume 15, 16, 17 and 18 (Pages 223-226) Book traversal links for Volume 21 (July 2021) A mixed-methods evaluation of experiential intervention exercises for values and committed action from an Acceptance and Commitment Therapy (ACT) mental health promotion program for university students (Pages 108-118) Up Can peer-tutored psychological flexibility training facilitate physical activity among adults with overweight? (Pages 1-11)