Leo was a very secure infant who had a warm, responsive relationship with his mother. As an adult, he finds it easy to trust his partner and enjoys a stable, long-term relationship.

In contrast, Toby's mother was often cold and rejecting. As an adult, Toby is highly independent, avoids intimacy, and worries about getting too close to others.

Discuss research into the influence of early attachment on later relationships. Refer to Leo and Toby in your answer.