Investigating manual performance when using push buttons following cold water hand immersion.

Area of Science:

• Human-computer interaction
• Ergonomics
• Environmental physiology

Background:

• Cold exposure can impair manual dexterity, potentially affecting the use of critical emergency equipment.
• Understanding human performance in cold conditions is vital for safety and rescue operations.

Purpose of the Study:

• To evaluate human manual performance with push buttons after cold water hand immersion.
• To identify key design factors influencing button activation in simulated emergency scenarios.

Main Methods:

• 29 participants performed a button activation task after immersing their dominant hand in cold (2°C) or thermoneutral (34°C) water.
• Button characteristics (size, shape, texture) and their activation rates were measured.
• Baseline hand dexterity and tactile sensitivity were assessed.

Main Results:

• Button activation rates were not significantly influenced by water temperature.
• Larger button size and protruding shapes were identified as significant factors improving performance.
• Button texture did not show a significant impact on activation rates.

Conclusions:

• While cold water immersion did not directly impact button activation in this study, design factors like size and shape are critical.
• Findings offer valuable insights for optimizing the design of emergency signaling devices for use in cold environments.