According to Occam's Razor, evaluation of psychological phenomena demands the most _____ explanation to account for the available data

Why is it impossible to completely eliminate error from psychological research?

a. Because all of the available research methods are fundamentally flawed. b. Because it is impossible to control every variable that might influence the behavior under investigation. c. Because no matter how hard we try to prevent it, some participants in research studies are dishonest and therefore bring error into the study. d. Because statistics can be manipulated to show any outcome that is desired, and even the most honest researcher will invariable force the data to show the outcomes that they desire.

A trait is polygenic if it is influenced:

a. By a gene on the X chromosome b. By a gene on the Y chromosome c. By more than one gene d. Only by a single gene