Mapping Memories: Enhancing Retrospective Data with the Life History Calendar.

Retrospective data collection methods provide a practical and cost-effective alternative to traditional longitudinal studies, particularly when time and resource constraints hinder long-term follow-up. While conventional retrospective questionnaires are widely used, their susceptibility to recall errors often compromises data reliability and accuracy. The Life History Calendar (LHC) has emerged as a solution to these limitations by incorporating visual prompts and contextual cues to enhance recall and improve data quality. This article offers a comprehensive overview of the LHC approach, highlighting its flexible design and diverse administration methods. Additionally, key considerations for the effective management, analysis and visualisation of LHC data are discussed.