Objective:

To provide initial evidence of effects of a newly developed digital behavioral treatment for chronic pain and to assess day-to-day changes in psychological flexibility, acceptance, pain-related functioning, pain intensity, and well-being.

Approach:

• Study Design: A replicated randomized multiple-baseline single-case experimental design (SCED) was utilized, incorporating pre- and post-treatment assessments and digital diary data.
• Participants: Participants included individuals aged 18 or older with chronic pain for at least three months, fluent in Swedish, and with access to digital devices.

Key Findings:

• The study utilized daily diary methods to capture fluctuations in psychological processes and pain-related outcomes.
• Initial evidence suggests potential benefits of the digital behavioral treatment for chronic pain, particularly in enhancing psychological flexibility and acceptance.
• The SCED approach allows for individual-level treatment effects to be assessed in a heterogeneous sample.

Interpretation:

The findings indicate that daily assessments may be sensitive to changes in psychological flexibility and acceptance during digital behavioral treatment, as observed in the study.

Limitations:

• The study's sample was heterogeneous, which may affect the generalizability of the findings.
• The optimization phase involved small cohorts, which may limit the robustness of the results and the confidence in the findings.

Conclusion:

The study aims to inform the design of a larger clinical trial with a randomized controlled design.