Adoptees often describe something specific: growing up surrounded by people who share none of your genetic traits — no one's nose, no one's temper, no one's laugh. Clinicians call this "genetic mirroring." It's never been formally defined as a psychological construct. New preprint tries to fix that: a formal definition, a testable nomological network, and a preliminary measurement scale. On SocArXiv: https://doi.org/10.31235/osf.io/y3rg9_v2 #Adoption #Psychology #OpenScience #AcademicChatter #IdentityDevelopment