Psychologist Carol Gilligan writes that "The penchant of developmental theorists to project a masculine image, and one that appears frightening to women, goes back at least to Freud." She sees Freud's criticism of women's sense of justice reappearing in the work of Jean Piaget and Lawrence Kohlberg. Gilligan notes that Nancy Chodorow, in contrast to Freud, attributes sexual difference not to anatomy but to the fact that male and female children have different early social environments. Chodorow, writing against the masculine bias of psychoanalysis, "replaces Freud's negative and derivative description of female psychology with a positive and direct account of her own."