How Interface Design Choices Lead to Indirect Environmental Impacts Through Use Intensification

Paper Title

How Interface Design Choices Lead to Indirect Environmental Impacts Through Use Intensification

Publication Info

• Topic area: Sustainable Human-Computer Interaction (HCI) and environmental impacts of digital design.
• Keywords: Cornucopian paradigm, use intensification, messaging apps, environmental impacts, scale-up mechanisms, design patterns, infrastructural expansion, device obsolescence, qualitative evaluation.

Background and Problem

• Problem / challenge: The mechanisms through which digital design choices contribute to the environmental impacts of ICT systems, particularly indirect effects, are poorly understood. Existing frameworks like the Cornucopian Paradigm lack detailed explanations of how specific design choices drive demand and infrastructure growth.
• Significance: ICT sector emissions are projected to grow significantly, potentially reaching 15% of global emissions by 2040. Understanding indirect effects of design choices is critical for mitigating these impacts and fostering sustainable digital practices.
• Motivation and related work: Prior studies have identified general design principles (e.g., instantaneity, pervasiveness) that increase user demand but lack empirical evidence on specific design choices. Messaging apps, as widely used digital services, provide a case study for examining how design influences infrastructural scaling and device obsolescence.

Solution

• Proposed approach: A mixed-method study combining feature analysis of 17 messaging apps and 12 user interviews to identify design-driven mechanisms contributing to the Cornucopian Paradigm.
• Novelty:
  1. Identification of five recurring "Cornucopian Design Patterns" in messaging apps.
  2. Conceptualization of four "Scale-Up Mechanisms" explaining how design choices lead to use intensification and environmental impacts.
  3. Development of eight "Moderation Heuristics" to guide sustainable design practices.
  4. Extension of the Cornucopian Paradigm framework with empirical evidence linking design choices to infrastructural and material effects.
• Procedure and key techniques:
  • Feature analysis: Systematic identification of 110 features across messaging apps using technical walkthroughs and app store screenshots.
  • User interviews: Semi-structured discussions with 12 participants to understand how design influences digital practices and infrastructural effects.
  • Thematic analysis: Cross-analysis of feature and interview data to identify patterns and mechanisms driving use intensification.

Results

• Concrete findings:
  • Five Cornucopian Design Patterns: Features allowing heavier file exchanges, encouraging new chat modalities, favoring AI use, demanding social media engagement, and discouraging data deletion.
  • Four Scale-Up Mechanisms: Fostering feature intensification, contributing to platform dependency, contributing to device dependency, and normalizing higher expectations.
  • Use intensification leads to increased data demand, infrastructural expansion, and device replacement.
• Advantage over baselines: Provides detailed empirical evidence linking specific design choices to environmental impacts, extending existing frameworks like the Cornucopian Paradigm.
• Experiments / evaluation:
  • Corpus: 17 messaging apps and 12 user interviews.
  • Methods: Feature analysis, thematic analysis, and qualitative coding.
  • Metrics: Identification of patterns and mechanisms rather than quantitative measures.
• Limitations and future work:
  • Focused on messaging apps; findings may not generalize to other domains.
  • Limited identification of positive design patterns; future work should explore features that mitigate use intensification.
  • Need for broader access to quantitative data from platforms to complement qualitative findings.

Summary

This study investigates how interface design choices in messaging apps contribute to indirect environmental impacts through use intensification. It identifies five Cornucopian Design Patterns and four Scale-Up Mechanisms that explain how design drives demand, infrastructural expansion, and device obsolescence. The findings extend the Cornucopian Paradigm framework and propose eight Moderation Heuristics to guide sustainable design practices. While focused on messaging apps, the study highlights the broader implications of design choices in driving unsustainable digital practices and calls for further research in other domains.