Verheiratete Paare aus einem niedrigeren sozioökonomischen Hintergrund weisen mit größerer Wahrscheinlichkeit synchronisierte Herzfrequenzen auf als Paare aus einem höheren sozioökonomischen Hintergrund. Dies baut auf früheren Untersuchungen auf, die zeigen, dass Menschen aus weniger privilegierten Verhältnissen tendenziell Beziehungen priorisieren und sich besser auf ihre Mitmenschen einstellen.

I’ve linked to the news release in the post above. In this comment, for those interested, here’s the link to the peer reviewed journal article:

https://www.sciencedirect.com/science/article/pii/S0301051125001528

From the linked article:

Spouses from less privileged backgrounds tend to share more synchronized heartbeats

When people feel emotionally close, their bodies may start to act in tandem. A new study published in Biological Psychology offers evidence that this alignment can reach the level of the heart. Researchers found that **married couples from lower socioeconomic backgrounds were more likely to show synchronized heart rate patterns than couples from higher socioeconomic backgrounds**. The findings suggest that social and economic conditions may shape not only how people relate to one another emotionally, but also how their bodies respond during social connection.

The researchers analyzed how closely the spouses’ heart rate patterns mirrored each other. When both people’s heart rates sped up or slowed down together, this was called “in-phase linkage.” When one person’s heart rate increased while the other’s decreased, that was labeled “anti-phase linkage.” In both cases, stronger linkage meant a tighter correlation between spouses’ heart rate shifts. The team looked at how these two types of linkage were related to the couple’s socioeconomic background.

Across both conflict and pleasant conversations, couples from lower socioeconomic backgrounds showed higher in-phase linkage. In other words, their heart rates were more likely to change in the same direction. At the same time, they showed lower anti-phase linkage, meaning their heart rates were less likely to change in opposite directions.

This pattern suggests that less affluent couples tend to experience a stronger bodily connection during interpersonal interactions. Their heart rhythms moved more in unison, regardless of whether they were arguing or sharing positive memories. The difference was particularly strong for anti-phase linkage, which was much lower in lower-income and lower-education couples compared to their more privileged peers.

These results held even after the researchers controlled for several other factors, including age and racial background. The effect was also more strongly tied to education than income, although both contributed to the findings.

Importantly, the level of synchrony did not appear to be linked to the emotional tone of the conversation or to how many times the couples used inclusive words like “we.” That suggests that the physiological linkage observed may be operating somewhat independently of what the spouses said or how they rated their emotions.

“**These findings build on a long line of research showing that people from less privileged backgrounds tend prioritize relationships and are more attuned to those around them**,” the researchers said. “Our study suggests, to our knowledge for the first time, that this connection may not only appear in feelings or behaviors, but also at a physiological level in the form of linked heart rates between spouses. It is a reminder that our social worlds live within us.”

I wonder how gender influences this. If this effect would be seen in queer couples as well, or in couples who earn equal vs differing amounts of incomes.

In that, higher socioeconomic couples may have access to more wealth, but do they always distribute the access to wealth equally in the relationship? I can imagine the stereotypical high socioeconomic couples where the “man earns the money” and the woman “manages the home”. The couple has a lot of wealth, but does the “stay at home wife” really have access to the wealth?

Likewise, I wonder if lower socioeconomic couples, who have less wealth to begin with, are more often equitable partners with the wealth they do have access to.