Three User Models Shape Sustainable Design Interventions

Why It Matters

Understanding these user models is crucial for designers aiming to influence sustainable behaviour. Explicitly acknowledging and selecting an appropriate model can lead to more effective and targeted design interventions, avoiding unintended consequences arising from misaligned assumptions about user motivations and decision-making processes.

Key Finding

The research identified three common ways designers think about users when trying to encourage sustainable actions: the 'Pinball' model where users are easily swayed, the 'Shortcut' model where users seek the easiest path, and the 'Thoughtful' model where users make deliberate choices.

Key Findings

• Designers often operate with implicit models of user behaviour when designing interventions.
• Three prevalent models identified are: 'Pinball' (users are easily influenced by external factors), 'Shortcut' (users prefer simple, low-effort solutions), and 'Thoughtful' (users engage in deliberate reasoning and decision-making).
• Each model carries different assumptions about user agency, motivation, and cognitive processes.

Research Evidence

Aim: To identify and characterize distinct models of user behaviour that emerge from design practice, particularly in the context of designing for sustainable behaviour, and to understand the underlying assumptions about human nature embedded within these models.

Method: Conceptual modelling and qualitative analysis of design statements.

Procedure: The researchers analyzed statements made by user experience designers about users when focusing on behaviour change. From this analysis, they identified and characterized three distinct models of user behaviour: the Pinball, the Shortcut, and the Thoughtful model, using systems terminology.

Context: Design for sustainable behaviour, user experience design, behavioural interventions.

Design Principle

Design interventions for behaviour change should be informed by an explicit understanding of the underlying user model being employed.

How to Apply

When developing a design project aimed at influencing user behaviour, start by articulating the assumptions about user motivation and decision-making. Then, select the user model ('Pinball', 'Shortcut', or 'Thoughtful') that best fits your context and use it to guide your design choices.

Limitations

The models are derived from designer statements and may not fully capture the complexity of actual user behaviour. The study focuses specifically on behaviour change for sustainability.

Student Guide (IB Design Technology)

Simple Explanation: When designers try to get people to act in more eco-friendly ways, they often have a basic idea of how people will react. This study found three main ideas: people are like pinballs (easily bumped around), like shortcuts (want the easiest way), or are thoughtful (think things through). Knowing which idea you're using helps make your design work better.

Why This Matters: Understanding these user models helps you create more effective designs by ensuring your approach matches how you believe people will behave and make choices, especially when aiming for sustainable actions.

Critical Thinking: How might a design intervention fail if the designer's assumed user model does not accurately reflect the target audience's actual behaviour and motivations?

IA-Ready Paragraph: In this design project, the approach to influencing user behaviour is guided by the 'Shortcut' user model. This model assumes that users will opt for the easiest and most convenient path when presented with choices. Therefore, the design prioritizes simplicity, minimal effort, and clear, direct actions to encourage the desired sustainable behaviour, ensuring that the sustainable option is the path of least resistance.

Project Tips

• When starting a design project, think about how your users will make decisions.
• Consider if your design is making it easy for users to do the right thing (Shortcut), if it's nudging them in a certain direction (Pinball), or if it's providing information for them to decide (Thoughtful).

How to Use in IA

• Use the 'Pinball', 'Shortcut', and 'Thoughtful' models to justify your design choices for behaviour change, explaining which model your design aligns with and why.
• Discuss how your chosen model influences the features and strategies within your design solution.

Examiner Tips

• Demonstrate an awareness of the underlying assumptions about user behaviour in your design.
• Justify your design choices by referencing one of the identified user models.

Independent Variable: Implicit user behaviour models (Pinball, Shortcut, Thoughtful).

Dependent Variable: Effectiveness of design interventions for sustainable behaviour.

Controlled Variables: Context of the design intervention, specific sustainable behaviour targeted.

Strengths

• Provides a clear framework for understanding designer assumptions.
• Offers practical categories that can be applied to design practice.

Critical Questions

• Are these three models exhaustive, or are there other significant ways designers conceptualize users?
• How can designers move beyond their own ingrained assumptions to better understand diverse user perspectives?

Extended Essay Application

• Investigate how different user models influence the design of educational tools for environmental awareness.
• Explore the application of these models in designing public service campaigns for waste reduction.

Source

Modelling the user: how design for sustainable behaviour can reveal different stakeholder perspectives on human nature · ePrints Soton (University of Southampton) · 2010