Structured ideation techniques like TRIZ reduce cognitive load by shifting brain activation to convergent thinking regions.

Why It Matters

Understanding how different ideation techniques impact cognitive load and brain activation can inform the development of more effective design processes and training methodologies. This knowledge allows design teams to select or adapt techniques that best suit the specific stage of design and the cognitive demands required.

Key Finding

Structured techniques like TRIZ appear to reduce overall cognitive load by focusing brain activity on convergent thinking and improving communication between different brain areas, whereas more open-ended techniques like brainstorming engage broader areas associated with divergent thinking.

Key Findings

• Brainstorming and morphological analysis demand more cognitive activation across the prefrontal cortex (PFC), particularly in regions associated with divergent thinking (right DLPFC, ventrolateral PFC).
• TRIZ elicits more cognitive activation in the left DLPFC, associated with convergent thinking and judgment.
• Morphological analysis and TRIZ enable greater coordination between brain regions compared to brainstorming.

Research Evidence

Aim: How do different concept generation techniques (brainstorming, morphological analysis, TRIZ) differentially affect cognitive activation patterns in the prefrontal cortex during engineering design tasks?

Method: Experimental study using neuroimaging (fNIRS)

Procedure: Engineering students used three distinct concept generation techniques (brainstorming, morphological analysis, TRIZ) while their prefrontal cortex brain activity was measured using functional near-infrared spectroscopy (fNIRS). Hemodynamic responses and functional connectivity were analyzed.

Sample Size: 30 participants

Context: Engineering design education and practice

Design Principle

Cognitive load in ideation can be modulated by the structure and focus of the technique employed.

How to Apply

During the early, divergent phases of a design project, utilize brainstorming or morphological analysis. As the project progresses towards selection and refinement, transition to more convergent techniques like TRIZ or structured evaluation methods.

Limitations

The study focused on engineering students, and findings may vary for designers from other disciplines or experienced professionals. The specific implementation of each technique by participants could also influence results.

Student Guide (IB Design Technology)

Simple Explanation: Different ways of coming up with ideas use different parts of your brain. Some methods, like TRIZ, make your brain work more efficiently by focusing on specific problem-solving areas, while others, like brainstorming, use more brain power for exploring lots of possibilities.

Why This Matters: Understanding how different ideation techniques affect your thinking can help you choose the best method for a specific design challenge, leading to more effective and efficient idea generation.

Critical Thinking: To what extent do individual differences in cognitive styles or prior experience with specific techniques influence the observed brain activation patterns?

IA-Ready Paragraph: The selection of ideation techniques can significantly influence the cognitive processes involved in design. Research indicates that structured methods like TRIZ engage brain regions associated with convergent thinking and enhance inter-regional coordination, potentially leading to more efficient problem-solving compared to more divergent techniques like brainstorming, which demand broader cognitive activation.

Project Tips

• When describing your ideation process, consider mentioning the cognitive demands of different techniques.
• If you observe differences in your own or your team's engagement with various methods, relate it back to cognitive load and brain activation patterns.

How to Use in IA

• Reference this study when discussing the rationale behind choosing specific ideation techniques for your design project, particularly if you are exploring different methods.
• Use the findings to justify why a particular technique might be more suitable for a certain stage of your design process.

Examiner Tips

• Demonstrate an awareness that ideation is a cognitive process with varying demands.
• Justify the selection of ideation techniques not just by their popularity, but by their potential impact on cognitive engagement and idea quality.

Independent Variable: Concept generation technique (Brainstorming, Morphological Analysis, TRIZ)

Dependent Variable: Brain activation patterns in the prefrontal cortex (e.g., oxygenated hemodynamic response, functional connectivity)

Controlled Variables: Participant group (engineering students), design task complexity, duration of technique use, fNIRS measurement protocols

Strengths

• Uses neuroimaging to provide objective data on cognitive processes.
• Compares multiple established ideation techniques.

Critical Questions

• How might these findings translate to different design disciplines or professional levels?
• What are the implications for collaborative design environments where multiple cognitive styles interact?

Extended Essay Application

• Investigate the impact of different collaborative ideation tools (digital vs. physical) on cognitive load and idea generation quality.
• Explore the relationship between personality traits and preferred ideation techniques, linking to cognitive activation patterns.

Source

Concept generation techniques change patterns of brain activation during engineering design · Design Science · 2020 · 10.1017/dsj.2020.30