The fact that all colors on older televisions were created by combining only three different colors of light supports the ____ theory of color vision

Students with a performance/avoidance goal orientation will __________

a) study and engage in other behaviors to increase their knowledge. b) exhibit whatever behaviors are needed to avoid failing. c) try to surpass the performance of their peers in order to enhance their own self-worth. d) work to the point where they are at least equal to their peers' level of performance.

According to the text, the major factor in achieving internal validity is

in the correct use of a. statistical techniques of analysis b. representative sampling methods c. inductive logic d. an adequate control group