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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Biology of romantic love | 12/14 | https://en.wikipedia.org/wiki/Biology_of_romantic_love | reference | science, encyclopedia | 2026-05-05T15:53:39.742070+00:00 | kb-cron |
=== Frustration attraction and uncertainty === Dopamine neurons in the ventral tegmental area are theorized to encode a "reward prediction error" (RPE) signal, rather than a reward per se. This RPE signaling indicates whether a given reward was either better, equal to, or worse than what was anticipated, and this is believed to be part of a reinforcement learning paradigm. Studies have shown that for learning about a stimulus to occur (so that behavior in response to it changes), the reward has to be surprising or unpredicted. Rewards which are better than predicted reinforce the behavior and cause it to become more frequent, while a reward which is worse than expected would be avoided. Dopamine neurons increase their firing rate when encountering an unexpected reward. After reinforcement learning occurs, dopamine neurons also fire in response to encountering cues in the environment which predicted the reward (e.g. in animal studies, a lever or a special sound). As predictions become updated and the rewards are the same as expected, dopamine activity comparatively diminishes. "Frustration attraction" (also called the "Romeo and Juliet effect") is the idea that adversity heightens romantic passion, for example, through social or physical barriers. The phenomenon has been remarked on by many authors, such as Socrates, Ovid, the Kama Sutra, and "Dear Abby". Bertrand Russell once opined that "when a man has no difficulty in obtaining a woman, his feeling toward her does not take the form of romantic love". Some common social barriers are parents who interfere with their children's romance (as in Romeo and Juliet), deceived spouses, or other social customs. Helen Fisher believes the phenomenon can be explained by the mechanics of dopamine, because animal studies have shown that when a reward which is anticipated to be incoming is delayed, reward-expecting neurons prolong their firing (over comparatively short timescales—in these studies) until the reward is delivered.
Passionate or infatuated love is also said to thrive in situations which involve the uncertainty of intermittent reinforcement, when consummation is withheld, when barriers prevent lovers from meeting regularly, or when one's perceptions of how likely their love is reciprocated are ambiguous and constantly changing. Uncertainty seems to magnify cue-triggered incentive salience "wanting". A comparable type of situation is that of a slot machine, where the rewards are designed to be always unpredictable so the gambler cannot understand the pattern. Unable to habituate to the experience, for some people the exhilarating high from the unexpected wins leads to gambling addiction and compulsions. If the machine paid out on a regular interval (so that the rewards were expected), it would not be as exciting. Uncertainty theory in the context of romantic love is associated with Dorothy Tennov's theory of limerence, an addictive, infatuated kind of love, commonly experienced for an unobtainable or unreachable person. In her study, Tennov observed reports of sometimes drastic emotional transitions caused by changes in one's perception over whether their love might be reciprocated, and these abrupt transitions could cause seeming emotional volatility even in otherwise stable individuals. The effect of uncertainty has also been interpreted as attachment anxiety. Intermittent maltreatment (known as "traumatic bonding" in abusive relationships) is also believed to intensify romantic "passion" (i.e. strong emotion, including suffering). This is, again, believed to be related to intermittent reinforcement and how one's expectations are confirmed or violated. According to Elaine Hatfield, 'Consistency generates little emotion; it is inconsistency that we respond to. If a person always treats us with love and respect, we start to take that person for granted. We like him or her—but "ho hum." [...] What would generate a spark of interest, however, is if our admiring friend suddenly started treating us with contempt—or if our arch enemy started inundating us with kindness.'
=== Positive illusions ===
People in love tend to overemphasize the positive aspects of their loved one or relationship, while overlooking or devaluing negative aspects. This is regarded as a type of cognitive bias called positive illusions. The phenomenon has also been referred to as crystallization, idealization, "love is blind" bias, putting the loved one on a pedestal, or seeing through rose-colored glasses. In the past, some authors have depicted the phenomenon as a malady, arguing that people who idealize would have their partner fall short of their high expectations as a relationship progresses; however, despite this, significant modern scientific evidence has shown that positive illusions actually contribute to relationship satisfaction, long-term well-being and decreased risk for relationship discontinuation. The exact mechanism is not currently understood, but some brain areas are proposed to be related. The dopaminergic areas of the reward system which are active in romantic love may be involved with attributing salience to the positive characteristics of a loved one. The dorsal anterior cingulate cortex is involved with error detection and has been active during negative social evaluation and exclusion, so that reduced activation of this area would be an adaptive response to a partner's negative characteristics. Certain areas of the prefrontal cortex could also be exerting top-down control to suppress emotional responses to attractive alternatives. Information is then passed to the orbitofrontal cortex, where positive and negative information is weighed, resulting in a biased subjective value about the partner.