A comparison of two training methods for improving warning symbol comprehension

Area of Science:

• Human Factors
• Cognitive Psychology
• Safety Research

Background:

• Warning symbols are crucial for safety but their comprehension can vary.
• Previous research indicated age-related differences in symbol comprehension, though this study found none initially.
• Effective training methods are needed to improve understanding of safety symbols across age groups.

Purpose of the Study:

• To compare the effectiveness of two training methods (verbal label vs. accident scenario) on warning symbol comprehension in younger and older adults.
• To investigate potential age-related differences in symbol comprehension before and after training.
• To assess the impact of training on response confidence and reaction times.

Main Methods:

• Participants (younger: 20-35 years; older: 50-70 years) were assessed on symbol comprehension before and after two training interventions.
• Training types included verbal label (symbol + meaning) and accident scenario (symbol + hazard details + consequences).
• Comprehension accuracy, response confidence, and reaction times were measured.

Main Results:

• No significant difference in initial symbol comprehension between younger and older adults (approx. 40% correct).
• Both training methods improved comprehension, but accident scenario training yielded higher accuracy and confidence.
• Accident scenario training also resulted in a more sustained reduction in reaction times.

Conclusions:

• Accident scenario training is more effective than verbal label training for improving warning symbol comprehension across adult age groups.
• Future research should focus on specific symbol characteristics that influence comprehension to enhance design and training.
• Effective training strategies can mitigate comprehension difficulties with safety symbols, regardless of age.