Researching Attachment: Strange Situation Test
The Strange Situation Test involves separating the very young child (toddler) from
its mother or primary caregiver
and then reuniting the
child with the
parent.
The infant is put through eight standardized episodes or situations, all meant to elicit differing levels of distress.  These include an experimenter entering the room, one or both leaving, and a stranger entering either with or without the parent
in the room.  Based on the infant’s
reaction to these situations, his
or her type of attachment
with the mother or
is identified.
This is carried out under controlled and
monitored conditions and involves carefully
recording the child’s reactions and the parent’s 
behavior.  It was developed by Mary Ainsworth who
extended the earlier groundbreaking work of John Bowlby.
Arranged by Dr. Gordon Vessels 2005
From Messer, D. and Miller, S. (1999). Exploring Developmental Psychology.  Copy of photo found at http://ibs.derby.ac.uk/~steve/devpsy/powerpoint/lec7social.ppt#7
Ainsworth, M.D.S., Blehar, M., Waters, E., & Wall, S. (1978). Patterns of attachment: A psychological study of the Strange Situation. Hillsdale, NJ: Erlbaum.