How close do you feel to the people who raised you, and to your closest friends? The Inventory of Parent and Peer Attachment (IPPA) measures exactly that — the felt security of your bonds with parents and peers, kept distinct from romantic attachment. Developed by Gay Armsden and Mark Greenberg in 1987 and used in hundreds of studies since, it rates these relationships on three dimensions: Trust (do they understand and respect you?), Communication (can you talk openly about what troubles you?), and Alienation (do you feel angry, isolated, or let down?). High trust and open communication with low alienation mark a secure base; the reverse signals a strained one.
The Inventory of Parent and Peer Attachment (IPPA; Armsden & Greenberg, 1987, Journal of Youth and Adolescence) is a widely used, validated self-report measure of the security of one's attachment to parents and to close friends, scored on three subscales — Trust, Communication, and Alienation. (Inventory of Parent and Peer Attachment (IPPA))