Effects of Micro-Interventions on Stress Reactivity

Not Applicable

Completed

• Conditions: Physiological Stress; Psychological Stress

• Registration Number: NCT04171154
• Lead Sponsor: Philipps University Marburg Medical Center

Brief Summary

This study aims to investigate the effects of short, psychological interventions on bio-psychological stress responses after an acute stressor. The efficacy of two different approaches (expectation-bases vs. acceptance-based) will be compared to a control-group.

Detailed Description

Not available

Study Timeline

• Study Start: 2019-08-15
• Study First Submitted: 2019-11-08
• Study First Submitted QC: 2019-11-18
• Study First Posted: 2019-11-20
• Primary Completion: 2020-10-19
• Study Completion: 2020-10-19
• Status Verified: 2021-07
• Last Update Submitted: 2021-07-01
• Last Update Posted: 2021-07-02

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 90

Inclusion Criteria

• fluent in German language

Exclusion Criteria

• chronic disease
• mental disease
• the evening before the day of the experiment until end of the experiment (the next day):
• caffeine, alcohol, intensive physical exercise, chewing gum
• acute hay fever
• current intake of psychotropic medication
• current intake of orale contraceptives
• visual impairments
• heart conditions (self and close relatives)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Change in Subjective Stress Ratings	at baseline, before the intervention, after the intervention; during the stressor, after the stressor; in total 45 minutes	VAS (visual analogue scale)
Change in Cortisol Levels	at baseline (min. -37), after the intervention (min. -19), after the stressor (min. 0), recovery 1 (min. +15), recovery 2 (min. +30); in total 67 minutes	saliva sample
Changes in Heart-Rate-Variability (HRV)	during baseline (duration 10 minutes), during the stressor (duration 20 minutes), during recovery (duration 10 minutes); in total 40 minutes	electrocardiogram
Changes in Affect	at baseline, after the stressor; in total 45 minutes	VAS (visual analogue scale)

Secondary Outcome Measures

Name	Time	Method
Self-Efficacy	at baseline, after the recovery-phase; in total 55 minutes	questionnaire (self-efficacy scale; Schwarzer \& Jerusalem, 1999)
Positivity	at baseline, after the recovery-phase; in total 55 minutes	questionnaire (positivity scale; Caprara et al., 2012, König, 2012)

Trial Locations

Locations (1)

Philipps University Marburg Medical Center; 🇩🇪 Marburg, Germany