In homes common across the 1960s and 1970s, children learned to read a parent’s mood from the sound of the front door before anyone had spoken a word — researchers call the adult result hypervigilance, and it shows up in 5 recognisable patterns
My father learned to read a room before he learned to read a book. The lock would turn, then a pause, then the exact weight of two shoes landing on the mat, and from those few seconds of hallway sound he already knew what kind of evening the house was in for. Keys set down ... Re…