Nokea
Which statement about the human immunodeficiency virus (HIV) is true?
- A. About 30 percent of all new HIV infections affect women.
- B. In South Africa, 30 percent of all pregnant women are HIV-positive.
- C. About 30 percent of new HIV infections occur in developing countries.
- D. Untreated HIV-infected mothers pass the virus to the fetus 30 percent of the time.
Correct Answer: B
Rationale: The correct answer is B: 'In South Africa, 30 percent of all pregnant women are HIV-positive.' This statement is true as South Africa has a high prevalence of HIV among pregnant women, emphasizing the need for interventions to prevent mother-to-child transmission. Choices A, C, and D are incorrect. Choice A is inaccurate as women account for more than 50% of new HIV infections globally. Choice C is misleading as the majority of new HIV infections actually occur in sub-Saharan Africa, not just developing countries. Choice D is also incorrect as without treatment, the risk of mother-to-child transmission is higher than 30%.
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In a structured observation, each participant has an equal opportunity to display the behavior of interest because the researcher designs a specific set of conditions or tasks for all participants to engage in, providing a standardized environment for observation.
- A. clinical interview
- B. naturalistic observation
- C. structured observation
- D. case study
Correct Answer: C
Rationale: In a structured observation, each participant has an equal opportunity to display the behavior of interest because the researcher designs a specific set of conditions or tasks for all participants to engage in, providing a standardized environment for observation. This allows for fair and equitable observations across all participants, ensuring that each individual has the same opportunities to exhibit the behavior being studied.
Choice A, clinical interview, typically involves a one-on-one interaction between a researcher and a participant focusing on collecting information through questions and answers, not providing equal opportunities for behavior display.
Choice B, naturalistic observation, involves observing individuals in their natural environment without intervention or manipulation of conditions, which may not always ensure equal opportunities for behavior display.
Choice D, case study, focuses on in-depth analysis of a single individual or a small group, providing detailed information but not necessarily ensuring equal opportunities for behavior display among participants.
The outermost level of Bronfenbrenner's model is the __________.
- A. microsystem
- B. macrosystem
- C. exosystem
- D. mesosystem
Correct Answer: B
Rationale: The outermost level of Bronfenbrenner's model is the macrosystem. This level refers to the broader cultural context that shapes the values, laws, customs, and resources of a particular society. It includes factors such as ideology, political systems, societal norms, and cultural influences that impact development at all other levels within the model.
Choice A, microsystem, refers to the immediate environment or setting in which an individual lives and interacts. Choice C, exosystem, involves settings that individuals do not directly experience but still influence them. Choice D, mesosystem, refers to the connections between various aspects of an individual's microsystem.
Jalynn is in the last half of the first month of her pregnancy. Which of the following is developing the fastest?
- A. circulatory system
- B. endocrine system
- C. nervous system
- D. skin
Correct Answer: C
Rationale: During the last half of the first month of pregnancy, the nervous system develops the fastest among the options provided. This rapid development of the nervous system is crucial for the overall growth and functioning of the fetus. The nervous system includes the brain and spinal cord, which are essential for various bodily functions and will continue to develop throughout the pregnancy. The circulatory system, although important, does not develop at the fastest rate during this stage. The endocrine system and skin also play significant roles in the development of the fetus but are not the systems that develop the fastest in the last half of the first month of pregnancy.
Before the late 1800s, childbirth usually took place __________.
- A. at home and was a family-centered event
- B. at home, but away from other family members
- C. in a hospital with trained midwives
- D. in the home of a medical professional or in a hospital
Correct Answer: A
Rationale: Before the late 1800s, childbirth usually took place at home and was a family-centered event. During this period, most women gave birth at home with the help of family members and possibly a midwife. Hospitals were not common settings for childbirth at that time. Choice B is incorrect because childbirth was not typically done away from family members. Choice C is incorrect because hospitals were not the common setting for childbirth before the late 1800s. Choice D is incorrect because giving birth in the home of a medical professional or a hospital was not the norm during that period.
Which of the following best describes a sequential design?
- A. Does not address diversity in developmental outcomes.
- B. Permits researchers to check if cohort effects are operating.
- C. Is less efficient than a longitudinal design.
- D. Makes cross-sectional, but not longitudinal, comparisons.
Correct Answer: B
Rationale: A sequential design permits researchers to check if cohort effects are operating. This design involves combining cross-sectional and longitudinal research, allowing for the comparison of different cohorts at different ages. By using this approach, researchers can determine if developmental changes observed are due to age or generation-specific factors. Therefore, a sequential design is valuable in addressing the potential influence of cohort effects on developmental outcomes. Choices A, C, and D are incorrect because a sequential design does not neglect diversity in developmental outcomes, is not necessarily less efficient than a longitudinal design, and can make both cross-sectional and longitudinal comparisons.