To overcome some of the limitations of traditional developmental designs, investigators sometimes use __________ designs, in which they conduct several similar cross-sectional or longitudinal studies.

Correct Answer: A

Rationale: Sequential designs involve conducting multiple similar cross-sectional or longitudinal studies to overcome limitations of traditional developmental designs. By combining different types of study designs, researchers can gain a more comprehensive understanding of development over time. This approach allows for more robust conclusions and can help address potential confounding variables that may impact the results.

Correct Answer: B

Rationale: Dr. Wu's observation of children's responses to bullying by watching them play in a park is an example of naturalistic observation. Naturalistic observation involves observing behavior in a natural setting without any manipulation or intervention. Dr. Wu is simply observing the children's behavior in a real-world setting to gain insights into how they respond to bullying, making it a naturalistic observation.

Correct Answer: C

Rationale: According to research, Native American populations have the highest prevalence of fetal alcohol syndrome (FAS) in the United States. This increased risk is due to various social, cultural, and environmental factors within Native American communities.

Correct Answer: B

Rationale: Piaget's cognitive-developmental theory, information processing, and Vygotskyƒ¢¢â€š¬¢â€ž¢s sociocultural theory all stress changes in thinking. These theories focus on how cognitive abilities develop over time, emphasizing the growth and transformation of thinking processes rather than static traits or characteristics.

Correct Answer: B

Rationale: Babies who are both preterm and economically disadvantaged typically require long-term, intensive intervention. This is because the combination of being born preterm and being economically disadvantaged can pose significant challenges for the infant's development. Providing ongoing support and interventions can help address these challenges and promote healthy development in these infants.

Correct Answer: C

Rationale: Vision is the least-developed of the newborn baby's senses. Newborns have limited visual acuity and are not able to focus clearly on objects. Over time, their vision will improve as they grow and develop.

Correct Answer: A

Rationale: The rooting reflex is the correct answer. This reflex helps a newborn baby find the nipple by turning their head and opening their mouth when their cheek is stroked or touched. This is crucial for the baby to locate and latch onto the mother's breast for feeding. The rooting reflex typically disappears around 4 months of age.

Correct Answer: A

Rationale: According to ecological systems theory, interactions between Marina and her child, Tyler, occur in the microsystem. The microsystem refers to the immediate social context in which an individual lives, such as interactions with family members, friends, and teachers. Marina and Tyler's interactions within their family unit would be considered part of the microsystem.

Correct Answer: D

Rationale: Cigarette smoking by a caregiver doubles the risk of SIDS. Secondhand smoke exposure can increase the likelihood of SIDS due to the toxins and chemicals present in cigarette smoke. It is important to have a smoke-free environment for infants to reduce the risk of SIDS.