An experimental paradigm to manipulate physiological arousal using consecutive successes

Area of Science:

• Psychology
• Human Performance
• Physiology

Background:

• Psychological pressure is known to affect human performance.
• Previous research often shows an inverted U-shaped relationship between arousal and performance.
• Laboratory methods for inducing pressure-like states are valuable for research.

Purpose of the Study:

• To develop an experimental paradigm to induce psychological pressure using consecutive successes.
• To investigate the effects of this pressure manipulation on arousal and task performance.
• To examine the relationship between arousal and performance under induced pressure.

Main Methods:

• Experiment 1: Participants (N=15) performed a force exertion task targeting 10 consecutive successes, with heart rate and force error measured.
• Experiment 2: Participants (N=15) aimed for 100 total successes to control for order effects.
• Physiological arousal (heart rate) and task accuracy (force error) were key outcome measures.

Main Results:

• Heart rate increased exponentially with consecutive successes, indicating significant arousal.
• Performance improved linearly with consecutive successes, contradicting the inverted U-shaped hypothesis.
• The arousal and performance changes were absent when the goal was total successes (Experiment 2).

Conclusions:

• The consecutive successes paradigm effectively induces psychological pressure and arousal.
• Performance can improve linearly under pressure, challenging traditional inverted U-shaped models.
• This method provides a scalable laboratory tool for studying arousal and performance dynamics.