Extraverts show faster, stronger, and more patterned emotional reactions

A new study provides evidence that people who score higher in extraversion tend to show stronger emotional reactions to positive images than to negative ones. These individuals reacted more quickly, reached higher levels of emotional intensity, and showed more predictable patterns in their feelings when viewing pleasant images. The findings, published in the journal Motivation and Emotion, support the idea that extraversion is linked to increased sensitivity to reward.

For nearly a century, psychologists have debated what defines extraversion and what processes underlie this trait. People high in extraversion are typically described as outgoing, energetic, and sociable, while introverts are more reserved and introspective. Decades of research have shown that extraverts report higher levels of positive emotion in daily life. But a key question remains: Why?

One proposed explanation is that extraverts are more sensitive to reward. They may respond more intensely to pleasant experiences, especially when those experiences are exciting or socially rewarding. This idea is often referred to as the “affective reactivity” view. Instead of being chronically happier, extraverts may simply react more strongly to positive stimuli in their environment.

Despite the appeal of this idea, past research has produced mixed results. Many studies have used broad mood induction procedures, such as watching films or recalling past experiences, but these methods may not capture the real-time dynamics of emotional reactions. Emotional reactions tend to be fast and fleeting, while mood states unfold more slowly. As a result, researchers have called for new tools that can measure the specific components of emotional responses—like how quickly they begin or how intense they become—in response to specific events.

“Biological theories of extraversion have long suggested that it should be linked to reward sensitivity and an emerging field of emotion dynamics has also suggested the need to measure emotional reactions in dynamic terms – that is, in terms of how quickly emotional reactions begin, how long they last, and so forth,” said study author Michael Robinson, a professor of psychology at North Dakota State University. “We designed the Dynamic Affect Reactivity Task (DART) to assess dynamic components of emotional reactivity and we sought to determine whether variations in the personality trait of extraversion can be observed when using the DART.”

The DART presents participants with a series of emotionally charged images and records continuous ratings of their emotional state over time. This allows researchers to track exactly when an emotional reaction begins, how intense it becomes, and how stereotypical or predictable it is across participants.

Two studies were conducted with a combined total of 266 undergraduate participants. In each study, participants viewed a series of images drawn from the International Affective Picture System, a standardized database of emotionally evocative pictures. The images were categorized as either appetitive (reward-related and pleasant) or aversive (threat-related and unpleasant), but they were matched in terms of arousal to ensure that emotional intensity wasn’t simply due to how stimulating the images were.

While viewing each image, participants used a computer mouse to continuously rate their feelings, moving the cursor up when they felt more pleasant and down when they felt more unpleasant. The software recorded these ratings 10 times per second, producing highly detailed emotional waveforms for each image.

The researchers also assessed participants’ level of extraversion using a well-established self-report questionnaire. The goal was to see whether extraversion predicted differences in emotional reactivity to positive versus negative images, focusing on four components: how often a reaction occurred (drop rate), how quickly it began (onset time), how intense it became (peak amplitude), and how closely the reaction matched the typical response pattern for that image (prototypicality).

Across both studies, the researchers found consistent evidence that people reacted more strongly to negative images than to positive ones. On average, participants showed faster, more intense, and more stereotypical emotional responses to aversive images. This finding aligns with the idea that our brains are wired to prioritize threats over rewards, possibly because rapid responses to danger are more important for survival.

But extraversion changed this pattern. Individuals who scored higher in extraversion showed less of this negativity bias. Compared to introverts, extraverts responded more quickly to positive images, had stronger emotional peaks, and showed more predictable emotional trajectories when reacting to pleasant stimuli. These effects were small but statistically significant, and they were consistent across both studies.

In the first study, extraversion was linked to faster emotional reactions, stronger peak responses, and greater prototypicality for appetitive images. In the second study, the pattern was similar, although the effect for peak intensity did not reach significance. When the data from both studies were combined, all four indicators of emotional reactivity showed significant associations with extraversion.

“Consistent with biological theories of extraversion, there was evidence that more extraverted individuals had faster, stronger, and more prototypical reactions to pleasant affective images, relative to introverts,” Robinson told PsyPost. “These links were not large, but they were systematic.”

Importantly, these results held even after accounting for general tendencies to react emotionally. In other words, it wasn’t just that extraverts were more reactive overall. They were specifically more reactive to positive, reward-related images.

The researchers interpret these findings as consistent with biological theories of extraversion that link the trait to the brain’s reward system, especially dopamine-related pathways. Past research has shown that extraversion correlates with activity in brain areas tied to reward processing, and that extraverts may be more responsive to dopamine-based drugs or feedback. The present results provide behavioral support for these ideas, showing that extraverts appear to be more tuned in to positive emotional experiences.

“There is a great deal of interest in what makes extraverts different from introverts,” Robinson explained. “Our findings suggest that extraverts may be prepared to respond, more quickly and unambiguously, to the positive events that happen to them. Examining emotional reactions in terms of temporal features, such as how quickly they begin and how prototypical they are, may allow us to understand the personality-emotion interface in new and important ways.”

The findings offer insight into emotional processing, though some features of the study may shape their generalizability. The participant pool consisted entirely of college students, primarily young and White, which may restrict how broadly the findings apply. The emotional stimuli were standardized images that may not fully capture the richness of real-life experiences, and although matched for arousal, they likely varied in personal relevance.

“In future research, it might be valuable to increase the number of affective stimuli that are presented,” Robinson said. “Doing so could better pinpoint the types of stimuli that elicit more positive reactions as a function of extraversion. For example, theories of extraversion implicate stimuli associated with biological reward (e.g., food, physically attractive others) rather than mere pleasantness (e.g., a nice piece of artwork) and including more positive stimuli of different types could provide support for this perspective.

“We have developed new tools to study the time course of emotional reactions. And we have started to think about how individual differences in emotional intelligence operate. But we have yet to link these two lines of research. It would be valuable to forge these links because we need more dynamic and process-oriented theories of emotional intelligence.”

“Readers may be interested in a recent special issue on emotional intelligence, with the topic of ‘Ability-related emotional intelligence: Knowns, unknowns, and future directions,'” Robinson added. “This special issue, which came out in the Journal of Intelligence, is an Open Access special issue, meaning that no subscription is required to access the articles.”

The study, “Extraversion’s link to reward sensitivity: evidence from an emotion dynamics task,” was authored by Michael D. Robinson, Muhammad R. Asad, Roberta L. Irvin, Hamidreza Fereidouni, and Pegah Zarei Talabad.