Having parents who understand how their day went may affect psychological adjustments of teenagers and their cellular responses to stress providing a possible link to improved physical health, the findings noted.

"These results provide preliminary evidence that parental accuracy regarding their adolescent's daily experiences may be one specific daily parent factor that plays a role in adolescent health and well-being," said researcher Lauren Human from the University of California, San Francisco in US.

In the study, 116 parent-teenager pairs completed daily diaries for two weeks. The adolescents and their parents rated the daily demands (how much work they had at school and at home) as well as the positivity of their day together.

The teenagers also rated their general levels of depression and stress. "Adolescents whose parents more accurately perceived the positivity of their day together reported lower depression and perceived stress," Human added.

In other words, when parents and teenagers generally agreed as to whether they had a good (or not so good) day together, the teenagers had better psychological adjustment.

The study also looked at how parental perceptions affected biological mechanisms relevant to health. That included tests of immune functions involved in inflammation, including cellular responses to the stress hormone cortisol.

Teenagers whose parents more accurately perceived the positivity of their day together exhibited greater 'glucocorticoid sensitivity'.

"Their immune cells were more sensitive to anti-inflammatory signals from cortisol," Human concluded.

The findings appeared in the journal Psychosomatic Medicine: Journal of Biobehavioral Medicine.

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