The Identity Issues Inventory: Identity Stage Resolution in the Prolonged Transition to Adulthood

The Identity Issues Inventory (I₃) uses an Eriksonian framework to assess identity stage resolution among those experiencing a prolonged transition to adulthood in terms of the developmental tasks of self-identity formation (integration and differentiation) and societal-identity formation (work roles and worldview). For this first analysis of this new measure, data were collected from two samples: (1) 196 people between the ages of 18 and 48 and (2) 1,489 participants between the ages of 18 and 41. Overall, the I₃ yields good factorial validity and reliability, and scores increase with age toward the “ceiling” of each task subscale, which represent anchors of a stable adult identity. Structural equation modeling assessed the relationships between these prominent identity issues and psychological health, revealing a positive relationship between the two constructs, providing evidence for predictive validity. An analysis of the second sample of 1,498 people confirmed these findings. The I₃ promises to be a useful tool in future investigations of identity stage resolutions for those aged 18 and above experiencing a prolonged transition to adulthood.