The case of Samuel George Morton is strong evidence that:
a. randomized sampling is important.
b. a scientist can subtly influence the outcome of an experiment.
c. placebo effects cannot be controlled.
d. the performance of participants can be influenced by the experimenter's nonverbal communication.
Question 2
Psychologists report that if a single recording error is made by an experimenter, it is usually:
a. an error that would lead to the failure to reject the null hypothesis.
b. in support of the experimental hypothesis.
c. due to fraud.
d. due to the personal equation.
Sequential decline of whale catches in the Antarctic shows the strong effect of human predators.
Cheetah with Two Indian Attendants and a Stag by George Stubbs, 1764–1765
St. George Jackson Mivart
Dominance relationships among individuals play an important role in many primate societies.
Caregivers’ responses sometimes help a child with strong emotions adapt to the environment.
It is important that parents repeat safety rules to preschoolers and monitor compliance with rules.