Evidence of negative effects of infants witnessing parent device use?
I have a 5 month old and both my husband and I work from home. I have my own business so am completely flexible on my hours and only work 2-3h a day (however also on the weekends), while my husband looks after the little one. Both our work is on our laptops and sometimes also on our phones. Occasionally, I work short bursts of time (15-20min) on my computer or phone while the baby is playing by herself on the floor next to where I sit. I am very strict about my baby never looking at a screen unless it's for family calls (we live quite far away form our family), and I never scroll social media or watch series or the like around her. Whenever she starts fussing or seems otherwise unhappy I of course attend to her immediately.
My mum (who lives in a different country so has never seen how our day looks like) keeps commenting on how parental screen use can negatively affect babies / small children (main point is about hindering their language and social development, making them prone to feel neglected and hence to act out). Is there any evidence for this? All studies I find seem to focus on screen time for infants / children, not them witnessing parent behavior.