I do believe that the type of attachment they develop highly correlates to how they will be later in life. For example, a variable that might develop the anxious/avoidant attachment are parents that were unavailable such as constantly working parents. These insecure parents would spend a lot of time away from their infant and thus never have the time to interact and teach the infant trust, security, love and so forth. From this anxious/avoidant attachment it seems more likely that the infant will develop into a distant and uncommunicative adult rather than a loving and social adult.