Low INTERNAL validity

• • Internal validity = the extent to which we are measuring what we intended to measure ​
• • Main & Weston (1981) found children behaved differently depending on which parent they were with​
• • This suggests that attachment type classification may not be valid as what we are measuring is one relationship rather than an complete personal characteristic ​
• • However, according to Bowlby’s theory of monotropy, the attachment type is largely related to the one special relationship with the mother ​
• • Main (1999) found that attachment types seemed to be mainly influenced by the mother, supporting Bowlby’s concept of monotropy and the internal validity of the Strange Situation