Correct Answer: C

Rationale: In this scenario, where Barney is assisting his younger brother in navigating narrow roads and sharp turns, Vygotsky would refer to this as an example of the 'mesosystem.' The mesosystem involves the interactions between different systems in a child's environment, such as family and peers. Choices A, B, and D are incorrect: A) Microsystem refers to the immediate environment where the child lives, like home and school; B) Macrosystem encompasses the larger cultural context; D) Exosystem involves external settings that indirectly influence the child.

Correct Answer: D

Rationale: The correct answer is D because in an experimental design, investigators manipulate variables to determine the effect of one on another. This process allows researchers to test causal hypotheses by manipulating one variable while keeping others constant. Choices A, B, and C are incorrect as they do not directly relate to manipulating variables in an experiment.

Correct Answer: C

Rationale: The correct answer is C. Social psychology focuses on how individuals relate to each other, influence each other, and interact within social groups. This field is more concerned with social interactions and behaviors rather than physical or genetic factors influencing behavior (choice A), internal factors leading to consistent behavior (choice B), or changes in behavior and mental processes over a lifetime (choice D). Therefore, the most appropriate area of interest for Larry, being a graduate student in social psychology, would be how people relate to and influence each other.

Correct Answer: D

Rationale: Subjective distress is not universal among individuals with a mental disorder. Choice A is incorrect as not all individuals with mental illness experience distress. Choice B is incorrect because distress is just one of the criteria used in diagnosing abnormality, not the only one. Choice C is incorrect because the presence of subjective distress alone is not sufficient for a clinician to determine if someone has a mental illness.

Correct Answer: B

Rationale: The cognitive perspective emphasizes understanding human behavior by focusing on internal mental events such as thoughts, beliefs, and perceptions. This helps in explaining how individuals process information, solve problems, and make decisions. Choice A, the role of the unconscious, is associated with psychoanalytic theory rather than the cognitive perspective. Choice C, the interrelations among the mind, body, and behavior, is more aligned with a holistic or biopsychosocial perspective. Choice D, the adaptive value of a behavior, is more related to evolutionary psychology rather than the cognitive perspective.