Relevant studies may include, but are not limited to:
- Pratt and Norris (1994) showed that, among older people, the more positive their earlier attachment relationships, the more positive their reports on their current social relationships.
- Hazan and Shaver (1987) showed similarities between romantic love as experienced by adults and the characteristics of attachment.
- Sternberg and Beall (1991) pointed out that many adults find that their relationships vary: with one partner, they experience an insecure bond, but with the next a secure one. Similarly, research into infant attachment has shown that a child could be securely attached to one parent, but be anxious towards the other.