their book. The concept of gender role has also been applied to non-human primates such as rhesus monkeys. Gender studies Gender studies is a field of interdisciplinary study and academic field devoted to gender, gender identity and gendered representation as central categories of analysis. This field includes Women's studies (concerning women, feminity, their gender roles and politics, and feminism), Men's studies (concerning men, masculinity, their gender roles, and politics), and LGBT studies. Sometimes Gender studies is offered together with Study of Sexuality. These disciplines study gender and sexuality in the fields of literature and language, history, political science, sociology, anthropology, cinema and media studies, human development, law, and medicine. It also analyses race, ethnicity, location, nationality, and disability. Psychology and sociology Many of the more complicated human behaviors are influenced by both innate factors and by environmental ones, which include everything from genes, gene expression, and body chemistry, through diet and social pressures. A large area of research in behavioral psychology collates evidence in an effort to discover correlations between behavior and various possible antecedents such as genetics, gene regulation, access to food and vitamins, culture, gender, hormones, physical and social development, and physical and social environments. A core research area within sociology is the way human behavior operates on itself, in other words, how the behavior of one group or individual influences the behavior of other groups or individuals. Starting in the late 20th century, the feminist movement has contributed extensive study of gender and theories about it, notably within sociology but not restricted to it. Social theorists have sought to determine the specific nature of gender in relation to biological sex and sexuality, with the result being that culturally established gender and sex have become interchangeable identifications that signify the allocation of a specific 'biological' sex within a categorical gender. The second wave feminist view that gender is socially constructed and hegemonic in all societies, remains current in some literary theoretical circles, Kira Hall and Mary Bucholtz publishing new perspectives as recently as 2008. As the child grows, "...society provides a string of prescriptions, templates, or models of behaviors appropriate to the one sex or the other," which socialises the child into belonging to a culturally specific gender. There is huge incentive for a child to concede to their socialisation with gender shaping the individual's opportunities for education, work, family, sexuality, reproduction, authority, and to make an impact