Some studies have issues of validity. For example, the love quiz uses self reporting like interviews and questionnaires. Participants may not be honest with their responses/ whether they have a realistic view of their own relationship
Retrospective data: looking back at one’s early relationship lacks validity because it relies on accurate recollections (Bailey et al.)
Studies such as the Love Quiz has low generalisability. The researcher conducted the study with an exclusively American population and could be ethnocentric.
Confounding variables: a environmental factor such as a child’s temperament might also affect the child’s attachment style and their ability to form relationships with others
DeterministicL the continuity hypothesis assumes that people who are insecurely attached as infants would have poor quality adult relationships suggesting that the outcome of relationships is fixed from a very early point and there is no ability to change them. This is not the case for many people