Memory Tracer & Memory Compass: Investigating Personal Location Histories as a Design Material for Everyday Reminiscence

Document Title

Memory Tracer & Memory Compass: Investigating Personal Location Histories as a Design Material for Everyday Reminiscence

Document Information

• Subject Area: Design research in Human-Computer Interaction (HCI), specifically focusing on the use of personal location history data to support everyday reminiscence.
• Keywords: Location history, temporality, design research, everyday reminiscence, slow technology, interaction design

Research Background and Issues

1. Identified Challenges and Issues:

   • The widespread use of smartphones, GPS applications, and location tracking technologies has resulted in the collection of vast amounts of personal location data. However, this data is often invisible, buried within software and online servers.
   • Despite its potential, personal location history data lacks significant forms of representation, limiting its use as a resource for reflection and reminiscing about everyday experiences.

2. Significance of the Problem:

   • Exploring and better utilizing personal location history data offers important design opportunities to support deep self-reflection, social connection, and memory construction.

3. Research Motivation and Related Work:

   • Previous research has shown that geographical locations can trigger memories, but there has been limited exploration of how location history data can be used as a design material for reminiscence experiences.
   • By integrating the framework of "slow technology," this study explores the potential of diverse temporal design approaches to support long-term interaction with personal data.

Solution

1. Proposed Methods and Solutions:

   • Through practice-oriented design research, the authors created two design artifacts: Memory Tracer and Memory Compass.
   • Memory Tracer is a physical device that periodically presents past location history data related to the current date.
   • Memory Compass is a smartwatch application that allows users to explore their historical locations based on direction, distance, and time.

2. Innovative Aspects of the Solution:

   • Memory Tracer uses a physical form to gradually reveal location data, incorporating the concept of slow technology.
   • Memory Compass helps users "project" and explore location history data through directional and distance-based settings, enhancing reflective geographic awareness.
   • Both artifacts expand the research on "location history as a design material," attempting to make data a dynamic resource for triggering everyday reminiscence.

3. Implementation Steps and Key Technologies:

   • Memory Tracer uses a random algorithm to select historical dates and locations, gradually displaying maps (a dynamic visual "tracing" form) to support emotional connections. The device employs a concrete casing and fiber optic technology for immersive map point visualization.
   • Memory Compass allows users to "project" locations by adjusting direction, distance, radius, and year, while utilizing haptic feedback and the user's current geographic location for interaction.
   • Both artifacts use Python scripts to process archived Google Maps Timeline data.

Research Outcomes

1. Specific Outcomes:

   • Developed two novel design artifacts that transform location history into a dynamic, interactive design material to support long-term memory reflection.
   • Provided preliminary validation that location-based designs can support unique reflective experiences, such as triggering complex memory chains through temporality and geographic awareness.

2. Comparison with Existing Solutions and Advantages:

   • Compared to traditional digital memory technologies, Memory Compass and Memory Tracer offer a more embodied and temporally rich way to engage with personal data.
   • The authors applied the principles of slow technology to location data, enabling reminiscence to expand and deepen as the data and users age.

3. Experimental or Evaluation Results:

   • Memory Tracer inspired users to reflect on the "past-present-future" relationship of time, enhancing reflective interaction by gradually revealing maps.
   • Memory Compass supported more active geographic historical reflection through directional exploration, revealing that location data from different distance ranges could trigger deeper memory experiences.

4. Limitations and Future Directions:

   • Limitations:
     • Based solely on single-user location history data, supported by the subjective experiences of the design team.
     • Data export and formatting are limited by existing technologies and services, such as the lack of a stable API for Google Timeline data.
   • Future Directions:
     • Expand the study to include multi-user and shared location history data.
     • Investigate interaction design at family or social levels to explore how location data can foster shared social memories.
     • Further develop data tools for designers to enhance the visualization and interactive use of large-scale location history information.

Summary: This study contributes two prototype designs at the intersection of "slow technology" and "location history as a design material," showcasing new possibilities for supporting everyday reflection and reminiscence while proposing future directions for improvement and expansion.