Heart Rate Variability Assessment: EmWave Pro
Time frame: Baseline, immediately after the intervention, 12 months post-intervention
The emWave Pro is a heart rhythm monitoring system that helps to observe an individual's autonomic state. This software provides HRV assessments that can be used in a wide range of applications such as quantifying HRV levels. Using HeartMath's EmWAVE Pro software, every participant will have an HRV assessment conducted that includes a resting HRV assessment (3 minutes), a stress prep (3 minutes), and a 1-minute deep breathing assessment.
Sleep Quality: The Pittsburgh Sleep Quality Index (PSQI)
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
PSQI is a 19-item questionnaire that assesses seven component scores; subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleep medication, and daytime dysfunction. The PSQI has an internal reliability of .83 and test-retest reliability of .85 for the global scale. PSQI global scores range from 0 to 21, with higher scores than 5 indicating sleep disturbance.
Nutrition: CDC Youth Risk Behavior Surveillance System (YRBSS)
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
The 2025 middle school version of the YRBSS is a national survey that includes 3 diet and weight-related items assessing nutrition that allow for national comparison with other youth.
Physical Activity: CDC Youth Risk Behavior Surveillance System (YRBSS)
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
The 2025 middle school version of the YRBSS is a national survey that includes 3 items assessing physical activity that allows national comparison with other youth.
Family Functioning: Family Assessment Device (FAD)
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
The FAD is a 60-item survey that assesses family functioning including problem solving, communication, roles, affective responsiveness, affective involvement, and behavior control. Scores range from 1 to 4 for each response. The higher the overall score, the worse the level of family function. It has reliability at .70 for all subscales except roles.
Psychological Flexibility:
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
The Acceptance and Fusion Questionnaire (AFQ\_Y8): an 8-item questionnaire developed for youth that examines their psychological inflexibility. It has an internal consistency of .83. Possible total scores range from 0 to 32. A higher total score indicates greater tendency to experience cognitive fusion (i.e. lower psychological flexibility).
Psychological Flexibility:
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
The Acceptance and Action Questionnaire (AAQ-II): a 7-item questionnaire developed for adults to measure their psychological inflexibility and experimental avoidance. It has an internal consistency of .84 and test-retest reliability of .79- .81. Possible total scores range from 7 to 49. Higher total scores on the AAQ-II indicate higher psychological inflexibility, experiential avoidance, and more potential psychological distress. Lower total scores mean more psychological flexibility.
Psychological Stress: Perceived Stress Scale (PSS-10)
Time frame: Baseline, immediately after the intervention, 6 months post-intervention, 12 months post-intervention
The PSS-10 is a 10-item self-measure of psychological stress. It has two subscales: perceived helplessness \& lack of self-efficacy. It has a Cronbach's alpha \>.70 and a test-retest reliability of \>.70. Total scores range from 0 to 40, with higher scores being indicative of higher levels of perceived stress.