We propose that not social bonding, but rather a different mechanism underlies the development of musicality: being unable to survive alone. The evolutionary constraint of being dependent on other humans for survival provides the ultimate driving force for acquiring human faculties such as sociality and musicality, through mechanisms of learning and neural plasticity. This evolutionary mechanism maximizes adaptation to a dynamic environment.

The purpose of this study was to determine whether certain self-discrepancies predicted the extent to which individuals experienced suicidal ideation. The Selves Questionnaire (an idiographic measure of self-beliefs) was administered to 152 undergraduate participants, who also completed measures of hopelessness, depression, and suicidal ideation. Three kinds of self-discrepancies were associated with suicidal ideation: actual:ideal, actual:ought, and actual:ideal:future. Covariance structure analyses indicated a best-fitting model suggesting that, actual:ideal and actual:ideal:future self-discrepancies contribute to hopelessness, which in turn contributes to depression and suicidal (...) ideation. The findings suggest that self-discrepancy, as a form of negative self-evaluation, may contribute to an individual's risk for suicidal ideation. Moreover, the findings point to an integration of self-discrepancy theory with hopelessness theory. (shrink)