A threat to internal validity that refers to the fact that the researcher knows the research hypothesis and thus causes an invalid confirmation of the research hypothesis is known as
a. a demand characteristic.
b. experimenter bias.
c. a placebo effect.
d. an informed experimenter effect.
Question 2
Experimenter bias refers to
a. the mistreatment of participants.
b. the participants' interpretation of the experimental manipulation.
c. differences in the participants' responses to the experimental manipulation.
d. differences in how the experimenter treats the participants.
Some organisms used as models in genetic research
40.04 Internal Surfaces
Different parts of the body mature at different rates. “General” refers to the body as a whole: the
Comparing Internal Structures of the Planets
Juvenile buzzard being weighed for research
Evolution of internal membranes