Conscientiousness increases efficiency of multicomponent behavior

Stock, Ann-Kathrin; Beste, Christian · 2015 · Crossref

DOI: 10.1038/srep15731

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Summary

This study investigates how personality traits, specifically within the Big Five framework, influence the efficiency of multicomponent behavior, which involves interrupting and chaining actions to achieve a goal. While cognitive psychology has established that serial (step-by-step) processing is more efficient than parallel (overlapping) processing in such tasks, the factors driving inter-individual differences in strategy selection remained unclear. The authors hypothesized that conscientiousness, a trait associated with top-down control and executive functioning, would significantly modulate the efficiency of action cascading. To test this, 163 participants completed the NEO-FFI personality inventory and performed a stop-change paradigm. This experimental task required participants to inhibit a prepotent response (STOP) and immediately execute a new response (CHANGE). The study manipulated the delay between the stop and change signals (0 ms vs. 300 ms) to assess processing strategies. Using mathematical constraints on reaction time data, the researchers calculated an SCD-RT slope for each participant to estimate their processing strategy: flatter slopes indicated a serial strategy, while steeper slopes indicated a parallel strategy. The results demonstrated that conscientiousness was the only Big Five trait significantly affecting multicomponent behavior, explaining approximately 19% of the variance in processing strategies. Higher levels of conscientiousness were correlated with flatter SCD-RT slopes, indicating a preference for serial, step-by-step processing. This strategy conferred a significant speed advantage; highly conscientious participants exhibited faster reaction times than their less conscientious counterparts in the 0 ms delay condition, where strategic choice was possible. No significant effects were found for other personality traits (extraversion, neuroticism, agreeableness, openness), nor were there effects on accuracy or pure inhibition metrics, ruling out speed-accuracy trade-offs. The findings conclude that conscientiousness is a major modulator of cognitive control in multicomponent situations. Highly conscientious individuals employ a more effective serial processing strategy, allowing them to prioritize task goals and avoid overstraining limited response selection capacities. This suggests that personality traits, particularly conscientiousness, are critical factors in understanding individual differences in executive function and the efficiency of complex, everyday behaviors requiring flexible action control.

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• personality driving