The __________ theory of color vision holds that we perceive colors because of pairs of receptors that make antagonistic responses

One way to increase the possibility that research results will generalize is to study a ____________ sample

A) small B) large C) single-person D) convenience

Mr. Marshall hired June to collect data from a group of subjects. Neither June nor the subjects were aware of the independent variable that Mr. Marshall had manipulated. This is an example of _______

a. randomization b. a placebo c. double-blind control d. experimenter bias