What were Isabella & Belsky's (1991) findings?
babies observed at 3 and 9 months
secure group interacted in a well-timed, reciprocal, mutually rewarding manner.
pairs classed as insecure due to interactions being minimally involved, unresponsive and intrusive.
avoidant pairs displayed maternal intrusiveness and overstimulation while resistant pairs were poorly coordinated, underinvolved and inconsistent.
Concluded that different interactional behaviours predicted attachment quality.