Looking into the T drop in fatherhood, the original study seems to account for self reports of 'sleep quality' but I wonder if sleep deprivation is not still a confounder in this finding.
Annedoctally as a recent father of a 6 month old, I would likely self report a good sleep quality in a questionnaire. However, objectively I know I sleep about 5 hours 30min yesterday evening, which would be sufficient sleep 'deprivation' to impact T production.
Also I think parents in general will also have strong bias to not want to acknowledge their own child as a 'nuissance' in a survey/questionnaire.
My key point is that it would be important to reproduce this finding with actual sleep tracking instead of self-reporting sleep quality, to confirm if this is indeed linked with a bonding/interaction mechanism with a child or an unfortunate secondary effect of sleep deprivation.
Annedoctally as a recent father of a 6 month old, I would likely self report a good sleep quality in a questionnaire. However, objectively I know I sleep about 5 hours 30min yesterday evening, which would be sufficient sleep 'deprivation' to impact T production.
Also I think parents in general will also have strong bias to not want to acknowledge their own child as a 'nuissance' in a survey/questionnaire.
My key point is that it would be important to reproduce this finding with actual sleep tracking instead of self-reporting sleep quality, to confirm if this is indeed linked with a bonding/interaction mechanism with a child or an unfortunate secondary effect of sleep deprivation.