The sympathetic nervous system response to a Continuous Performance Task

Area of Science:

• Psychology
• Neuroscience
• Human Physiology

Background:

• Continuous Performance Tasks (CPTs) are utilized to assess vigilance, attention, and cognitive effort.
• Mental stressors can elicit physiological responses, particularly within the sympathetic nervous system.
• Understanding the interplay between psychological states and physiological reactions during cognitive tasks is crucial.

Purpose of the Study:

• To investigate sympathetic nervous system responses during a CPT.
• To explore correlations between physiological measures and psychological variables (anxiety, stress, mindfulness).
• To examine the relationship between physiological responses and task performance.

Main Methods:

• Twenty undergraduate students participated in the study.
• Physiological measures including blood pressure, skin conductance, and heart rate variability were recorded.
• Participants completed psychological assessments for state/trait anxiety, perceived stress, and mindfulness.
• Performance on the CPT, including accuracy, was measured.

Main Results:

• Blood pressure and skin conductance significantly increased from baseline during the CPT.
• Heart rate variability did not show significant changes during the attention test.
• No significant correlations were found between physiological measures and psychological variables.
• A trend suggested higher perceived stress was associated with lower accuracy on foil items (p=0.09).

Conclusions:

• The CPT elicits sympathetic nervous system activation, evidenced by increased blood pressure and skin conductance.
• Psychological factors like anxiety, stress, and mindfulness were not significantly correlated with the measured physiological responses during the CPT.
• Further research may be needed to explore subtle relationships between perceived stress and cognitive performance in attention-demanding tasks.