Complex sentence: She believed that through gender-schematic processing, a person spontaneously sorts attributes and behaviours into masculine and feminine categories, and that therefore individuals processes information and regulate their behavior based on whatever definitions of femininity and masculinity their culture provides.
Split into simpler sentences: She believed that through gender-schematic processing, a person spontaneously sorts attributes and behaviors into masculine and feminine categories. Therefore, an individual processes information and regulate their behavior based on whatever definitions of femininity and masculinity their culture provides.