How do you compare and contrast realism and naturalism using In the Shadow of the Glen?

realism is more about the relations between people sociologically, plays such as isbens centre on this

When looking at naturalism the character will be effected directly by their environment. Refer to Woyzeck by Buchner.

Naturalism devotes to darwinisms theories and is more obsessed with the philosophy that our environment shapes us, look for lengthy scientific prose or scientific ramblings.

Realism will show up more when characters are more centred on themselves as a person and their direct actions, taking responsibility for themselves, relating to one another quite logically.

I dont know the play you are asking about but pay particular notice to the ways in which different characters speakto one another.

not an authority onthe subject but am myself inthe middle of an essay making a distinction between realism andnaturalism in plays by Buchner, Isben and Wedekind. (Woyzeck, Buchner;A Doll's House, Isben; Springs Awakening, Wedekind)

The two can often show up in oe play so focus on logic for realism and environmental and heriditory influence over actions for Naturalism.

Realism= the person, and the aaction;

Naturlism= Character manipulated by environmental, hereditory factors, not completely responsible  for their actions.

Realism as with  Naturalism focus on sociology strongly. specifically the social structureof the burgoise.

Good luck