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Components of type A behavior and task-induced cardiovascular activation
Insights
The Irritation and Impatience component of Type A behavior is linked to cardiovascular reactivity, specifically heart rate changes during tasks. The Hard-Driving and Competitive aspect showed no relation to physiological measures.
Area of Science:
- Psychology
- Cardiovascular Health
Background:
- The Type A behavior pattern is a potential risk factor for cardiovascular disease.
- Previous research suggests certain behavioral components may differentially relate to physiological responses.
Purpose of the Study:
- To investigate which subcomponents of the Type A behavior pattern are most strongly associated with cardiovascular reactivity.
- To differentiate the physiological impact of "Irritation and Impatience" versus "Hard-Driving and Competitive" traits.
Main Methods:
- Participants completed the Jenkins Activity Survey to assess Type A behavior components.
- Physiological measures including heart rate, pulse transit time, forearm electromyography, and palmar skin conductance were recorded.
- Subjects performed a continuous perceptual motor task with pre- and post-task baseline measurements.
Main Results:
- The "Irritation and Impatience" dimension was significantly related to task-induced changes in heart rate and pulse transit time.
- The "Hard-Driving and Competitive" dimension showed no significant association with any measured psychophysiological variables.
- Regression and analysis of variance models consistently supported the link between "Irritation and Impatience" and cardiovascular changes.
Conclusions:
- The "Irritation and Impatience" facet of Type A behavior is a key driver of cardiovascular reactivity during demanding tasks.
- This reactivity pattern suggests active coping mechanisms in individuals high in "Irritation and Impatience".
- The "Hard-Driving and Competitive" traits do not appear to directly influence the measured cardiovascular responses in this context.
Abstract:
The present study sought to determine whether there are subcomponents of the Type A behavior pattern that are more closely related to cardiovascular reactivity than others. The components studied were factor analytically derived subscales of the Jenkins Activity Survey denoting Irritation and Impatience, on the one hand, and Hard-Driving and Competitive, on the other. Heart rate, pulse transit time, forearm electromyography, and palmar skin conductance were measured while the subjects performed a continuous perceptual motor task, as well as during baselines before and after the task. The Irritation and Impatience dimension was consistently related to task-induced changes in heart rate, both in regression analyses and in extreme group analyses of variance. A significant relation was also observed for pulse transit time but not for electromyography. The Hard-Driving and Competitive dimension, on the other hand, was not related to any psychophysiological measures. These results were interpreted to mean that Irritable and Impatient subjects showed a cardiovascular reaction pattern indicative of active coping processes during task performance.