Takahashi ( 1990 ) - used strange situation technique to study 60-middle-class Japanese infants and their mothers and found similar rates of secure attachment to those found by Ainsworth in the US. However, unlike the original sample, the Japanese infants showed no evidence of insecure-avoidant attachment and high rates of insecure-resistant attachment ( 32% ), the Japanese infants were particularly distressed on being left alone, in fact their response was extreme that 90% of the infants were stopped.