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.
Threat display by a Sydney funnel-web spider (Atrax robustus).
The fact that a mother works outside the home has no negative effect on the well-being of her child ...
The Tsunami Threat in Japan
Internal structure of the nose—lateral view
Internal Anatomy of the Spinal Cord
Research Methods