Professor Smith is conducting a study on the psychological effects of gambling. She wants to make sure that the findings from her study may potentially help some gamblers avoid addiction. This is known as:

A phenomenon in which two variables enhance each other is termed

A) a bifurcation. B) an enhancement. C) an interaction. D) a crossover effect.

When a researcher investigates a document to determine if the author listed actually wrote it, or if the version is a counterfeit, this is an example of _____________

A) External criticism B) Internal criticism C) Plagiarism D) Investigator detection