Mary Ainsworth
Strange Situation Classification
Ainsworth researched attachment styles using an experiment called 'Strange situation Classification' .
In her experiment she researched how parenting may affect the quality of attachment, children need a secure attachment to parents before seeking unfamiliar situations.
She focused on children aged 9 - 18 months and monitored how babies would act when their primary care giver left the room.
The results led her to summarise her findings in to 4 types of attachment styles.