The primary problem with using a pretest in an experiment is
a) The pretest may actually encourage participants to be dishonest during the experiment.
b) The pretest may sensitize participants and encourage them to act in a specific manner.
c) The pretest may bias the experimenter to expect a certain experimental outcome.
d) The pretest may lessen the impact of the experimental manipulation and dilute the findings.
Question 2
Reactivity may pose a threat to the external validity of an experiment because
a) Participants may act differently since they are aware they are being observed
b) Participants may not want to complete the experimental protocol
c) Participants may be responding to internal scripts that are dictating their behavior
d) Participants may attempt to discover the purpose of the experiment and act accordingly
Miller-Urey Experiment Updated
An Example of an Electrical Stimulation Experiment
Trig Problem
The Taylor–Woods–Hughes experiment
Problem
One pathway of primary succession in Alaska’s Glacier Bay region.