Sibling disconnectedness
Sibling disconnectedness has been studied in 2 papers since 2025: 2 observational studies in people; 2 in the past year. The newest paper, Jul 18, 2026: “Sibling Disconnectedness in Midlife and Cognitive Functioning in Later Life: Is Loneliness an Explanatory Factor?”.
2 papers study it3 findingsUpdated
“Results indicated that individuals disconnected from siblings in smaller sibships displayed an accelerated rate of cognitive decline.”
- 1 lab in 1 country
- 1 finding against
- Funder: National Institute on Aging
- Humans2
What did studies of Sibling disconnectedness find?
1Studies of Sibling disconnectedness measured 1 outcome; the most studied are cognitive decline (2 studies).
Cognitive decline
no changein humans1upin humans1
2 studies
Cognitive decline
no changein humans1upin humans1
Sibling disconnectedness has no effect on cognitive decline in humans.
“Persistent sibling disconnectedness was not directly associated with cognitive decline”
Humanspersistent sibling disconnectedness
Journal of aging and health
Sibling disconnectedness increases cognitive decline in humans.
“Results indicated that individuals disconnected from siblings in smaller sibships displayed an accelerated rate of cognitive decline.”
Humansin smaller sibships
Sibling Disconnectedness, Sibship Size, and Cognition in Later Life
GSA 2025 abstract
What is Sibling disconnectedness linked with?
1Studies link Sibling disconnectedness with 1 measure, most often cognitive function (1 study).
Cognitive function
downin humans1
1 study
Cognitive function
downin humans1
Sibling disconnectedness is associated with cognitive function in humans.
“it was significantly and indirectly associated with cognition through loneliness.”
Humanspersistent sibling disconnectedness
Journal of aging and health