The science of sleep and attachment (the facts) As a level 6 sleep consultant one of the most common things I hear, and see, is parents terrified to make changes to their babies sleep incase they damage their bond. Its time to move away from fear based narratives and look at the actual data. Attachment is built on responsiveness and emotional availability during the thousands of interactions you have every single day. It is not a fragile thing that breaks because you set a boundary around sleep.