The authors present the results of a project to develop scales to measure the features of adult attachment using a construct-oriented approach. Adult attachment is defined in terms of eight features: proximity seeking, secure base effect, separation protest, feared loss of the attachment figure, reciprocity, availability, responsiveness of the attachment figure, and use of the attachment figure. Each feature was defined and a large item pool to tap all dimensions was derived from item nominations by clinicians, researchers, and lay subjects. The resultant scales were administered to a small sample for preliminary empirical testing. Analyses of internal reliability for each scale resulted in the elimination of items that detracted from reliability. After editing, all scales had satisfactory internal consistency. A discriminant-functions analysis provided suggestive evidence that this method of defining and measuring adult attachment would have relevance for identifying psychopathology.