Procrastination and impulsivity are genetically linked, suggesting that the two traits stem from similar evolutionary origins, according to the latest research, in the study, "Genetic Relations Among Procrastination, Impulsivity, and Goal-Management Ability: Implications for the Evolutionary Origin of Procrastination," recently published in Psychological Science, a journal of the Association for Psychological Science. The research indicates that the traits are related to our ability to successfully pursue and juggle goals.
“Everyone procrastinates at least sometimes, but we wanted to explore why some people procrastinate more than others and why procrastinators seem more likely to make rash actions and act without thinking,” explains psychological scientist and study author Daniel Gustavson of the University of Colorado Boulder, according to the April 7, 2014 news release, Exploring the genetics of 'I'll do it tomorrow'. “Answering why that’s the case would give us some interesting insights into what procrastination is, why it occurs, and how to minimize it.”
From an evolutionary standpoint, impulsivity makes sense: Our ancestors should have been inclined to seek immediate rewards when the next day was uncertain.
Procrastination, on the other hand, may have emerged more recently in human history. In the modern world, we have many distinct goals far in the future that we need to prepare for – when we’re impulsive and easily distracted from those long-term goals, we often procrastinate. Thinking about the two traits in that context, it seems logical that people who are perpetual procrastinators would also be highly impulsive. Many studies have observed this positive relationship, but it is unclear what cognitive, biological, and environmental influences are responsible for it.
The most effective way to understand why these traits are correlated is to study human twins. Identical twins — who share 100% of their genes — tend to show greater similarities in behavior than fraternal twins, who only share 50% of their genes (just like any other siblings). Researchers take advantage of this genetic discrepancy to figure out the relative importance of genetic and environmental influences on particular behaviors, like procrastination and impulsivity.
Gustavson and colleagues had 181 identical-twin pairs and 166 fraternal-twin pairs complete several surveys intended to probe their tendencies toward impulsivity and procrastination, as well as their ability to set and maintain goals. They found that procrastination is indeed heritable, just like impulsivity. Not only that, there seems to be a complete genetic overlap between procrastination and impulsivity — that is, there are no genetic influences that are unique to either trait alone.
Probing identical twin's tendeny toward impulsivity and procrastination
That finding suggests that, genetically speaking, procrastination is an evolutionary byproduct of impulsivity — one that likely manifests itself more in the modern world than in the world of our ancestors. In addition, the link between procrastination and impulsivity also overlapped genetically with the ability to manage goals, lending support to the idea that delaying, making rash decisions, and failing to achieve goals all stem from a shared genetic foundation.
Gustavson and colleagues are now investigating how procrastination and impulsivity are related to higher-level cognitive abilities, such as executive functions, and whether these same genetic influences are related to other aspects of self-regulation in our day-to-day lives. “Learning more about the underpinnings of procrastination may help develop interventions to prevent it, and help us overcome our ingrained tendencies to get distracted and lose track of work,” Gustavson concludes, according to the news release.
Previous research has revealed a moderate and positive correlation between procrastination and impulsivity
Researchers wanted to learn more about why these two constructs are related. In the present study, the researchers used behavior-genetics methodology to test three predictions derived from an evolutionary account that postulates that procrastination arose as a by-product of impulsivity: (a) Procrastination is heritable, (b) the two traits share considerable genetic variation, and (c) goal-management ability is an important component of this shared variation.
These predictions were confirmed. The researchers found that first, both procrastination and impulsivity were moderately heritable. Second, although the two traits were separable at the phenotypic level, they were not separable at the genetic level, says the study's abstract. Finally, variation in goal-management ability accounted for much of this shared genetic variation. These results suggest that procrastination and impulsivity are linked primarily through genetic influences on the ability to use high-priority goals to effectively regulate actions.
Co-authors on this research include Akira Miyake, John Hewitt, and Naomi Friedman of the University of Colorado Boulder. This research was supported by National Institutes of Health Grants MH063207, HD010333, and DA011015.
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