This data contains information about adults' attachment style in romantic relationships measured by the Adult Disorganised Attachment Scale (ADA) and the Revised Experiences in Close Relationships Questionnaire (ERS-RS). It also contains the participants demographic data (age, gender, gender, sexual orientation, Ethnic group, current relationship status, and how many relationships they had been in lasting more than 2 years), their engagement in punitive behaviours (Buss Perry Aggression Questionnaire) and their Caregiving style (Caregiving Questionnaire). This was all measured in 149 English-speaking adults over the age of 18, living in the UK.