Which of the following illustrates the process of random assignment in an experimental study?
A) Participants are assigned to a group depending on whether or not they smoke.
B) Participants roll a die, and the number is used to assign them to one of six groups.
C) Participants are assigned to the "male" or "female" group depending on their gender.
D) Participants are asked which of two groups they prefer.
B) Participants roll a die, and the number is used to assign them to one of six groups. Random assignment requires that neither the participant nor the researcher influences the process of how participants are placed in groups.
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A design in which measures are taken at baseline and after the introduction of the independent variable at different times across multiple situations is a _____ design
a. multiple-baseline across subjects b. multiple-baseline across time c. multiple-baseline across situations d. multiple-baseline across behaviors
Landon’s parents wonder how his self-esteem will differentiate in adolescence. Which dimensions of self-evaluation is Landon likely to add to those of middle childhood?
A) close friendship, romantic appeal, and job competence B) athletic ability, academic ability, and physical attractiveness C) physical attractiveness and relationships with family members D) spirituality, integrity and honesty, and academic ability