Related Experiment Video
Updated: Feb 12, 2026

Author Spotlight: Evaluating the Adjuvant Efficacy and Safety of Angong Niuhuang Pill in Viral Encephalitis Treatment
Published on: April 19, 2024
Effectiveness of a smartphone-based worry-reduction training for stress reduction: A randomized-controlled trial
Anke Versluis1,2, Bart Verkuil2,3, Philip Spinhoven2,3,4
1a Health, Medical and Neuropsychology Unit , Institute of Psychology, Leiden University , Leiden , The Netherlands.
A smartphone-based worry-reduction training did not improve heart rate variability (HRV) or psychological stress in individuals with work stress. Further research into alternative digital stress interventions is recommended.
Area of Science:
- Psychology
- Health Technology
- Stress Management
Background:
- Perseverative cognition and unconscious stress are key mediators between stressors and physiological health.
- Work-related stress is a significant public health concern.
- Smartphone interventions offer accessible avenues for stress management.
Purpose of the Study:
- To evaluate the efficacy of a smartphone-based worry-reduction training.
- To assess the impact of the training on heart rate variability (HRV) and psychological stress.
- To explore effects on implicit affect and other psychological outcomes.
Main Methods:
- A randomized controlled trial involving 136 participants reporting work stress.
- Participants were assigned to an experimental group (worry-reduction training + emotion logging), control group (emotion logging), or waitlist.
- Primary outcome: 24-h HRV assessments; Secondary outcomes: implicit affect and stress.
Main Results:
- No significant changes in HRV or psychological stress were observed from pre- to post-intervention.
- There were no significant differences in outcomes between the training and control groups.
- The intervention did not effectively improve the measured physiological or psychological stress markers.
Conclusions:
- The tested smartphone-based worry-reduction training was ineffective for improving HRV or psychological stress.
- Future research should explore alternative digital interventions for stress management.
- Smartphones present a promising platform for developing accessible stress-reduction tools.
Related Concept Videos
Oxidation-Reduction Reactions
Oxymercuration-Reduction of Alkenes
Block Diagram Reduction
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
Phase I Reactions: Reductive Reactions
Esters to Alcohols: Hydride Reductions
Lithium aluminum hydride is a source of hydride ions and functions as a nucleophile. The mechanism proceeds in three steps. Firstly, the nucleophilic hydride ion attacks the carbonyl carbon of the ester to form a tetrahedral intermediate. Subsequently, the carbonyl group re-forms,...
Alcohols from Carbonyl Compounds: Reduction
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...

