Although research has shown that this polymorphism produces adverse outcomes under stressful contexts (i.e., a diathesis hypothesis), the same gene may also act more generally to
enhance environmental sensitivity; thereby producing positive youth outcomes in positive contexts (i.e., genetic plasticity)(Simons and Lei 2013; Wickrama and O'Neal 2015).
An active illumination source is independent of
environmental changes, including changes in temperature or light, and provides
enhanced contrast and higher
sensitivities.»