The purpose of this study is to further develop and validate a measure of parental attachment for emerging adults. First, I reviewed the professional literature in attachment theory and history of attachment measures to provide theoretical foundations for the development and validation of the APCI. Then, I presented the rationale and hypotheses of the APCI scale validation as well as the research methodology. 260 emerging adults (i.e., college students) participated in this study. Consistent with expectations, findings indicated that the APCI contains clear two factors: APCI Avoidance and Anxiety. This study also provides initial support that the APCI has adequate psychometric qualities, including reliability, construct validity, convergent validity, discriminant validity, criterion validity, and concurrent validity. Overall, the Attachment to Parent/Caregiver Inventory (APCI), provides a cost-efficient and psychometrically sound instrument for counseling psychologists interested in understanding emerging adults' parent-child relationships. The current study extends understanding about the parental attachment of millennial generation in emerging adulthood. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]