Effects of prolonged work on data entry speed and accuracy

Area of Science:

• Cognitive psychology
• Human factors engineering
• Human-computer interaction

Background:

• Understanding the effects of fatigue on cognitive and motor tasks is crucial for optimizing work schedules and preventing errors.
• Data entry is a common task susceptible to performance decrements due to fatigue.

Purpose of the Study:

• To investigate how prolonged work conditions and fatigue affect the component cognitive and motor processes involved in keyboard data entry.
• To examine the speed-accuracy trade-off during fatiguing data entry tasks.

Main Methods:

• Two experiments were conducted where participants entered 4-digit numbers via keyboard under fatiguing conditions.
• Performance metrics including accuracy and response times for different stages of data entry were recorded.

Main Results:

• In Experiment 1, data entry accuracy decreased while response times improved, indicating a speed-accuracy trade-off.
• Experiment 2 revealed differential effects on cognitive (initial digit entry) and motoric (keystroke) processes, with some components improving and others declining over time.
• Accuracy and time for subsequent digits generally decreased, while final keystroke time decreased throughout the session.

Conclusions:

• Prolonged work and fatigue differentially impact cognitive and motoric aspects of data entry.
• Performance decrements and speed-accuracy trade-offs occur at different stages and points within a fatiguing work session.
• Findings suggest a complex interplay of facilitation and inhibition affecting data entry performance under sustained cognitive and motor load.