Sustainability integration shifts cognitive load in engineering design

Why It Matters

Understanding how the cognitive demands of design change with added complexity, such as sustainability, is crucial for educators and design practitioners. This insight can inform the development of more effective teaching methods and design support tools that cater to different stages of learning and expertise.

Key Finding

Adding sustainability requirements to design tasks reduces the number of solutions generated by less experienced students and increases their cognitive effort, while more experienced students handle these requirements more efficiently with less cognitive strain.

Key Findings

• Without sustainability, first-year students generated more solutions than seniors.
• First-year students showed higher activation in cognitive flexibility areas, while seniors showed higher activation in uncertainty processing and self-reflection areas.
• When sustainability was included, first-year students generated fewer solutions, while senior students maintained their output and showed reduced cognitive load.
• Educational progression appears to enhance the ability to manage complex requirements like sustainability with less cognitive effort.

Research Evidence

Aim: How do additional dimensions of sustainability affect the cognitive processes and solution generation of engineering students at different educational levels?

Method: Comparative neurocognitive study

Procedure: Participants (first-year and senior engineering students) were tasked with generating solutions to design problems, some of which included sustainability requirements. Their neurocognitive activation and the number of unique solutions generated were measured.

Sample Size: 20 participants (12 first-year, 8 senior)

Context: Engineering education

Design Principle

Cognitive load in design is influenced by the complexity of requirements and the designer's expertise; introduce complex constraints gradually.

How to Apply

When designing educational modules or design challenges, consider scaffolding the introduction of sustainability criteria to allow students to develop the necessary cognitive strategies.

Limitations

Small sample size; specific design problems used may not generalize to all design contexts.

Student Guide (IB Design Technology)

Simple Explanation: Adding sustainability to a design problem makes it harder for newer students to come up with ideas and makes their brains work harder, but experienced students handle it better.

Why This Matters: This research highlights how adding complexity to a design brief can change how people think and how many ideas they produce, which is important for understanding user behaviour in design projects.

Critical Thinking: To what extent does the 'cognitive flexibility' observed in first-year students represent genuine innovation versus a less constrained, less efficient approach to problem-solving?

IA-Ready Paragraph: This research indicates that the cognitive load associated with design tasks increases when additional complex requirements, such as sustainability, are introduced. This impact is more pronounced for less experienced designers, who may generate fewer solutions and exhibit higher neurocognitive activation, suggesting a greater mental effort is required to process and integrate these new dimensions.

Project Tips

• When researching design challenges, consider how adding constraints (like sustainability) might affect the number and type of solutions generated.
• Think about the cognitive effort required for different design tasks and how this might vary for users with different levels of experience.

How to Use in IA

• Use this study to justify why you might be exploring a specific design problem with or without certain constraints, and how this might affect your own idea generation or that of your target user.

Examiner Tips

• Demonstrate an understanding of how the complexity of design requirements can impact cognitive load and solution generation, especially when comparing different user groups.

Independent Variable: ["Presence of sustainability dimensions in design problems","Student's year of study (first-year vs. senior)"]

Dependent Variable: ["Number of unique design solutions generated","Neurocognitive activation patterns"]

Controlled Variables: ["Number of design problems","Type of design problems (excluding sustainability aspect)","General cognitive abilities of participants (assumed to be similar within engineering student cohorts)"]

Strengths

• Uses neurocognitive measures to provide objective data on cognitive processes.
• Compares different levels of student expertise, offering insights into learning and development.

Critical Questions

• How might different types of sustainability requirements (e.g., material sourcing vs. end-of-life) differentially affect cognitive load?
• What specific teaching strategies could be employed to help students develop the cognitive flexibility to integrate sustainability more efficiently?

Extended Essay Application

• An Extended Essay could explore how different design methodologies (e.g., biomimicry, cradle-to-cradle) impact the cognitive load when integrating sustainability, comparing novice and expert designers.
• Investigate the transferability of cognitive skills learned in sustainability-focused design tasks to other complex problem-solving scenarios.

Source

Cognitive differences among first-year and senior engineering students when generating design solutions with and without additional dimensions of sustainability · Design Science · 2021 · 10.1017/dsj.2021.3