Info:
IMDB

Darren Prager is an aspiring writer who finds himself completely unable to comprehend the intricacies of human behavior. Obsessed with finding the key to understanding the nature of character, he turns a co-worker's family into the unwitting subjects of his new project. Darren's own humanity is soon put to the test when he goes beyond observational research to the realm of gross violation.

Link:
Disquiet