Van Ijzendoorn and Kroonenberg conducted a study to look at proportions of secure, insecure-avoidant and insecure-resistant attachments across countries to assess cultural variation, and differences in the same country. Researchers located 32 studies where Strange Situation was used with 1990 children. These studies were meta-analysed. In all countries secure attachment was most common. In the UK, Sweden, Holland, USA and Germany the percentage of insecure-avoidant was higher than insecure resistant (unlike Japan and Israel) whereas China was equally split.