If attachment is a biological innate process, as Bowlby’s theory suggests, then secure attachment should be the best form for all humans regardless of variations in culture. However, there is much research against this statement, making us question whether attachment is or is not a biological innate process at all.
Studies such as Ainsworth’s Uganda research support Bowlby’s theory. She observed how infants in Uganda, like in the US and UK used their mothers as secure bases, and mothers of securely attached infants showed greater caregiver sensitivity. Tronick showed how in an African tribe, the Efe, infants were looked after by multiple people, sleeping with their mothers at night, and still showed to have one primary attachment towards their mothers.
A Meta-analysis, performed by Van Ijzendoorn and Kroonenberg (1988) showed how possibly, cultural variations may result in differences in attachment types. Looking at the findings from 2000 Strange Situation (SSC) classifications from 32 studies from 8 different countries, they found that although secure attachment was the most common attachment across all the countries, there were significant differences in the distribution of insecure avoidant and insecure resistant attachment types. Western cultures, or individualist cultures, which value independence had a more dominant insecure avoidant proportion, whereas non-western cultures, or collectivist cultures, which value dependence, a more dominant insecure resistant. For example, West Germany had 35% insecure avoidant compared to 8% insecure resistant, whereas Israel had 7% insecure avoidant compared to 29% insecure resistant.
The results proved that yes, secure attachment type is the most common form across the globe, supporting the idea that secure attachment is the best for healthy social and emotional development, but there are differences when it comes to the insecure attachment types.