A new measure of temperament, Rothbart's Children's Behavior Questionnaire (CBQ), was used to compare children with attachments to objects and those without such attachments. Comparisons were used to determine whether temperament differences between children with and without a history of object attachment held for children with and without a history of thumb- and finger-sucking. Findings were expected to improve understanding of the origins of children's self-soothing behaviors. Parents of 86 children of 4, 6, and 8 years of age completed Rothbart's CBQ and the Object Attachment Questionnaire. Comparative analysis of the data indicated that children who were attached to objects more frequently enjoyed gently rhythmic activities, being sung to, snuggling up to a parent, taking warm baths, sitting quietly in the sunshine, and looking at picture books. There were no interactions between age and object attachment group. Compared to others, children with frequent thumb-sucking were rated as less likely to: (1) become excited about anticipated pleasurable events; (2) enjoy high stimulus intensity events; and (3) smile and laugh in response to changes in stimulus intensity. Findings support suggestions that individual differences in temperament are associated with the development of attachment to objects. Temperament characteristics were related both to whether or not an object attachment developed and the type of self-soothing behavior used. (RH)