The aims of this research were to develop and validate a Brief Attachment Adjective Checklist (BAAC) to represent the four category model of attachment, compare it with a current measure of attachment, and use both to predict relationship satisfaction. A 32-item operationalisation of a hypothesised four-category model was analysed using a principal component analysis. Results of Study 1 (n = 174) indicated the items of the four-category model reflected good factor structure. Comparison with the four-paragraph Relationship Questionnaire (RQ) showed low correlation between the two operationalisations, suggesting that they were measuring different aspects of attachment. Analyses showed that the BAAC was a weak but better predictor of relationship satisfaction than the RQ. A confirmatory factor analysis in Study 2 (n = 131) refined the structure of the BAAC. The pattern of correlations showing relative independence of the BAAC and the RQ in Study 1 was also shown in Study 2. The frequency of respondents in dominant attachment categories of the RQ was consistent with previous research but the frequency of respondents in dominant attachment categories differed for RQ compared with the BAAC. The replication of the prediction of relationship satisfaction in Study 2 showed that both measures were weak predictors of relationship satisfaction but the BAAC was a better predictor than the RQ.