Nursing Elites

1. Why is it particularly useful to study identical twins who were raised in different environments?

• A. Differences in brain function can be easily identified.
• B. Concordance rates tend to be higher.
• C. It is possible that the genetics of twins who have been separated have changed in ways to explain any differences found.
• D. It is possible that high concordance rates between identical twins reared together are due to their being treated more similarly than nonidentical twins.

Correct answer: D

Rationale: Studying identical twins raised in different environments allows researchers to understand the impact of genetics versus environmental factors on traits. Choice A is incorrect because differences in brain function can be influenced by a variety of factors and not solely by environmental differences. Choice B is incorrect as concordance rates tend to be higher in identical twins reared together due to shared genetics and environment. Choice C is incorrect because genetics do not change due to being raised in different environments.

2. When the parent returned in the strange situation experiment, babies with ____ attachment tend to remain upset for long periods of time, kicking, screaming, refusing to be distracted with toys, and sometimes arching back and away from contact?

• A. Secure
• B. Avoidant
• C. Ambivalent
• D. Disorganized

Correct answer: C

Rationale: In the strange situation experiment, babies with ambivalent attachment display distress and have difficulty calming down when a parent returns. They may kick, scream, refuse toys, and show signs of physical discomfort or resistance. This behavior is characteristic of ambivalent attachment, where the infant shows mixed emotions and finds it hard to be soothed by the returning parent. Secure attachment (Choice A) refers to babies who seek comfort from the parent but can be soothed upon return. Avoidant attachment (Choice B) involves babies showing little emotion upon reunion with the parent. Disorganized attachment (Choice D) displays inconsistent or confused behaviors in the strange situation experiment.

3. The baby coos and the mom smiles, so the baby coos again to get mom to smile again. Piaget would say that this action is an example of?

• A. Reflexes
• B. Primary circular reactions
• C. Secondary circular reactions
• D. Tertiary circular reactions

Correct answer: C

Rationale: The correct answer is C: Secondary circular reactions. Secondary circular reactions are repeated actions that infants engage in to trigger a response from the environment, such as the baby cooing to make the mom smile. This behavior is characterized by a focus on the external environment and the repetition of actions to achieve a desired response. Choices A, B, and D are incorrect. Reflexes (choice A) are automatic, involuntary responses to a stimulus, while primary circular reactions (choice B) involve the repetition of actions primarily for the infant's own enjoyment rather than to elicit a response from the environment. Tertiary circular reactions (choice D) refer to the experimentation with new behaviors and variations in the way the infant interacts with the environment.

4. How does the concept of neural plasticity relate to recovery from brain injuries?

• A. Neural plasticity means the brain cannot recover from injuries.
• B. Neural plasticity allows the brain to recover and reorganize after injuries.
• C. Neural plasticity refers to the brain's inability to change after injury.
• D. Neural plasticity is a myth.

Correct answer: B

Rationale: Neural plasticity allows the brain to recover and reorganize after injuries. It is the brain's ability to adapt and change, forming new connections or reorganizing existing ones to compensate for damage. Choice A is incorrect as neural plasticity enables recovery. Choice C is incorrect as neural plasticity involves the brain's capacity to change. Choice D is incorrect as neural plasticity is a well-established phenomenon in neuroscience.

5. The understanding of genetic influences on behavior may never be fully achieved due to ________.

• A. the ease of researching to differentiate between the effects of the environment and genes.
• B. the likelihood that most behaviors are determined by the interaction of many genes and the environment.
• C. the reliance on twin studies in genetic research.
• D. our significant understanding of how genes impact brain chemistry.

Correct answer: B

Rationale: The correct answer is B because most behaviors are influenced by the interaction of multiple genes and the environment. Choice A is incorrect because it suggests that researching the effects of the environment and genes is easy, which is not the case. Choice C is incorrect as it focuses on a specific method (twin studies) rather than the broader concept of gene-environment interaction. Choice D is incorrect as the statement implies a high level of understanding that contradicts the idea that genetic influences on behavior may never be fully understood.

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