If the calculated value of F is less than the critical value of f, the experimenter should conclude that _____
a. there is a significant difference among groups and proceed to a test of multiple comparisons.
b. all groups are significantly different from one another
c. only the highest and lowest group means are significantly different from one another
d. none of the group means differ significantly from one another
D
If the calculated value of F is smaller than the critical value of F, the experimenter must conclude that there are no significant differences between the means. Any differences observed are likely to be due to chance.
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Evolutionary-based research on altruism has demonstrated that
a. only humans show any example of helping behavior. b. altruism does not begin to emerge until puberty. c. we abandon immature forms of moral thinking as we develop. d. humans may have a genetic make-up that predisposes them to behave both antisocially and prosocially.
Which of the following is a feature of the germinal stage of prenatal development?
A) The major organ systems begin to form. B) The zygote divides repeatedly while moving to the uterus. C) The stage lasts from implantation to the eighth week of development. D) The mother begins to feel the fetal movements.
When was the first separate juvenile court established in the United States?
A. 1785 B. 1820 C. 1899 D. 1955
An industrial-organizational psychologist has been asked to identify the ways in which high-stress and low-stress game designers are different
The psychologist comes up with the tentative explanation that the degree of control over one's work determines the designer's stress level. This tentative explanation, which must be tested, would constitute which step in the scientific method? a. theory building b. operationally defining the problem c. proposing a hypothesis d. gathering evidence through observations