in an experiment the independent variable
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Human Growth and Development Final Exam

1. In an experiment, the independent variable __________.

Correct answer: B

Rationale: In an experiment, the independent variable is the one that the investigator expects to cause changes in another variable. It is the factor that is deliberately manipulated or changed by the researcher to observe its effects on the dependent variable. The purpose of manipulating the independent variable is to study its impact on the outcome, allowing researchers to establish cause-and-effect relationships in their investigations. Choice A is incorrect because the independent variable is not influenced but rather influences another variable. Choice C is incorrect as the independent variable is intentionally manipulated by the researcher. Choice D is incorrect as it refers to a different concept unrelated to the independent variable in an experiment.

2. The __________ reflex helps a newborn find the nipple.

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.

3. __________ coping is largely emotion-focused and self-blaming, impulsive, or escapist.

Correct answer: A

Rationale: The correct answer is A: 'Avoidant.' Avoidant coping refers to strategies that involve avoiding the problem and focusing more on emotions. This type of coping mechanism can often lead to negative outcomes as individuals may engage in self-blaming, impulsive behaviors, or seek escapist routes rather than addressing the issue directly. Choice B, 'Ineffective,' is a broad term and does not specifically capture the characteristics described in the question. Choice C, 'Problem-focused,' is the opposite of avoidant coping as it involves actively addressing the issue at hand. Choice D, 'Flexible,' does not align with the description provided, as flexibility in coping involves adapting strategies based on the situation, not necessarily being emotion-focused, self-blaming, impulsive, or escapist.

4. A childbirth leave of __________ predicts favorable maternal physical and mental health, supportive marital interaction, and sensitive caregiving.

Correct answer: D

Rationale: Research indicates that a childbirth leave of 12 weeks or more leads to favorable outcomes for maternal physical and mental health, supportive marital interaction, and sensitive caregiving. This extended period of leave allows mothers to recover physically, adjust psychologically, and establish strong bonds with their newborn, which ultimately benefits the whole family. Choices A, B, and C are incorrect as they do not provide the optimal duration needed for mothers to experience the full range of benefits associated with an extended childbirth leave.

5. During prenatal development, the ectoderm folds over to form the __________, or primitive spinal cord.

Correct answer: B

Rationale: The correct answer is B. During prenatal development, the ectoderm folds over to form the neural tube, which eventually develops into the brain and spinal cord. The neural tube is the precursor to the central nervous system, including the primitive spinal cord. Choices A, C, and D are incorrect because the mesoderm does not form the neural tube, the endoderm is not involved in the formation of the central nervous system, and neuron tract is not the structure that forms the primitive spinal cord.

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