The idea that the environment affects a person, and then the person reacts to it, thus changing the environment
Epigenetics
Environmental pressures can change the activity of genes (e.g. some genes get turned off due to environmental pressures, and the next gen inherits those genes turned off)
Polygenic
Multiple genes (i.e. when something is caused by multiple genes it is this)
Diathesis
Related psychological disorders; many disorders have a genetic predisposition and an environmental trigger
Maturationism
Related to development; all children develop the same way in the same order, that is genetic, but when or if they do so is related to environment
Plasticity
The idea that the brain changes and arranges itself in response to what is happening in its environment
Epigenetics changes your genes, plasticity changes your brain structurally
