alert phases are periods of time when babies signal that they are ready for an interaction, research shows that mothers typically pick up and respond to baby’s alertness 2/3 of the time- FELDMAN AND EIDELMAN 2017. yet this varies depending on external factors- FINEGOOD ET AL 2016. from around 3 months, this interaction is increasingly frequent and involves the mother and the baby paying close attention to each other’s verbal signals- FELDMAN 2007.