Research demonstrates that there are significant gender differences in self-disclosure, particularly emotional self-disclosure, or expressing personal feelings and emotions, such as "Sometimes, I feel lonely to study abroad and to be away from my family." Emotional self-disclosure is at core of intimate relationship developments, because unlike factual (descriptive) self-disclosure, or sharing superficial self-relevant facts, such as "I'm studying abroad in Japan", it is more personal and more effective to cultivate intimacy. Emotional self-disclosure makes individuals "transparent" and vulnerable to others. According to previous studies, females are more socially oriented, whereas males are more task-oriented, and thus females are believed to be more socially interdependent than males. This is one of the reasons that contributes to the gender difference in self-disclosure. In a friendship between females, emotional attachments such as sharing emotions, thoughts, experiences, and supports are at the core, while friendships between males tend to focus on activities and companionship. Overall, women's friendships are described as more intimate than men's friendship.