Final answer:
The reductionist approach blames an individual's level of cognitive development for behaving in a gender-inappropriate way, according to the gender schema theory.
Step-by-step explanation:
The reductionist approach is a problem because if an individual behaves in a gender-inappropriate way, gender schema theory blames their level of cognitive development. According to gender schema theory, individuals develop schemas or mental frameworks that organize their understanding of gender roles. These schemas influence their behavior, and if someone deviates from the expected gender norms, it is attributed to their cognitive development.