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Updated: May 20, 2025

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Exploring Change Mechanisms in a Complex Intervention: Lessons Learned From a Longitudinal Constructivist Grounded

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This study shows how to explore complex health intervention mechanisms using a longitudinal grounded theory approach. Understanding change mechanisms over time offers deeper insights into intervention effectiveness for caregivers.

Keywords:
change mechanismcomplex interventionconstructivist grounded theoryimplementation sciencelongitudinal qualitative researchnursing research

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Area of Science:

  • Health Services Research
  • Qualitative Research Methods
  • Nursing Research

Background:

  • Effective complex health interventions require understanding their underlying change mechanisms.
  • Qualitative methods are crucial for exploring the nuances of intervention processes.
  • Longitudinal designs capture temporal dynamics essential for complex interventions.

Purpose of the Study:

  • To provide a practical example of exploring change mechanisms in complex health interventions.
  • To demonstrate the application of a longitudinal constructivist grounded theory approach.
  • To share lessons learned from applying this methodology to a psychoeducational intervention for dementia caregivers.

Main Methods:

  • A longitudinal constructivist grounded theory approach was employed.
  • Data were collected through interviews with family dementia caregivers over time.
  • Quantitative intervention outcomes were integrated into the qualitative analysis.

Main Results:

  • Comparing data across time points revealed subtle changes not explicitly stated by participants.
  • Interviews during the intervention offered greater insight into change awareness than post-intervention interviews.
  • Within- and across-participant analyses identified unique and shared change pathways.
  • Integrating quantitative data highlighted facilitators and barriers to change.

Conclusions:

  • The longitudinal constructivist grounded theory approach effectively elucidates complex intervention change mechanisms.
  • Considering the temporal and complex nature of participant experiences is vital for in-depth understanding.
  • This methodology provides valuable insights for developing and refining health interventions.