in a correlational design researchers

ATI RN

Human Growth and Development Exam 1

1. In a correlational design, researchers __________.

A. gather information on individuals without altering their experiences
B. divide events and behaviors of interest into two types: dependent and independent variables
C. use an evenhanded procedure to assign people to two or more treatment conditions
D. directly control or manipulate changes in the independent variable

Correct answer: A

Rationale: In a correlational design, researchers gather information on individuals without altering their experiences. Correlational studies examine the relationship between two or more variables without any manipulation or control by the researchers. The researchers simply observe and measure the variables of interest without intervening in any way. Choices B, C, and D are incorrect because they describe aspects related to experimental designs rather than correlational designs. In an experimental design, researchers manipulate variables, assign participants to different treatment conditions, and control changes in the independent variable, which is not the case in correlational studies.

2. Dr. O'Connor wants 90-year-old Mr. Takashi to participate in a research study that involves moderate risks. Mr. Takashi is incapable of consenting. Which statement best expresses your advice regarding Mr. Takashi's participation in the study?

A. He should not be allowed to participate in the study under any circumstances.
B. He should be allowed to participate in the study regardless of the benefit.
C. He should be allowed to participate in the study only if his participation will benefit others.
D. He should be allowed to participate in the study only if it is likely to benefit him directly.

Correct answer: D

Rationale: Mr. Takashi should be allowed to participate in the study only if it is likely to benefit him directly. This decision aligns with the principle of beneficence in research ethics, which emphasizes maximizing benefits and minimizing risks for research participants. Since Mr. Takashi is incapable of giving consent, his participation should be based on the likelihood of direct benefits to him rather than solely for the benefit of others or solely for research purposes. Option A is too restrictive and does not consider potential benefits to Mr. Takashi. Option B is flawed as it disregards the need for the study to benefit Mr. Takashi. Option C focuses on benefiting others, which is not the primary consideration when the participant cannot give consent.

3. Katie wonders when she will first be able to hear her fetus's heartbeat through a stethoscope. You tell her that this should happen by the __________.

A. fourth week of pregnancy
B. third month of pregnancy
C. end of the second trimester
D. beginning of the third trimester

Correct answer: B

Rationale: The correct answer is the third month of pregnancy (choice B). During the third month of pregnancy, which is around 9-12 weeks, a fetal heartbeat can typically be heard using a stethoscope. This is an exciting milestone for expectant parents as it provides reassurance about the baby's well-being. Choices A, C, and D are incorrect because by the fourth week of pregnancy, the fetal heartbeat is not usually detectable with a stethoscope. The end of the second trimester and the beginning of the third trimester are too late in the pregnancy timeline for this milestone.

4. The discontinuous view of development holds that __________.

A. infants and preschoolers respond to the world in much the same way as adults do
B. growth is the process of gradually augmenting the skills that were present from the beginning
C. infants and children have unique ways of thinking, feeling, and behaving
D. development is a smooth process limited only by a lack of information and precision

Correct answer: C

Rationale: The discontinuous view of development holds that infants and children have unique ways of thinking, feeling, and behaving. This perspective suggests that development is not a continuous or smooth process, but rather occurs in distinct stages or phases marked by qualitative differences in abilities and behaviors. This contrasts with the idea that development is a gradual augmentation of skills present from the beginning (choice B) or that infants and preschoolers respond to the world in the same way as adults (choice A). Choice D is incorrect because the discontinuous view does not consider development as a smooth process limited by a lack of information and precision. Ultimately, the discontinuous view emphasizes the distinct and evolving nature of development across the lifespan.

5. What is the function of the corpus luteum?

A. is where fertilization usually takes place
B. secretes hormones that prepare the lining of the uterus to receive a fertilized ovum
C. is one of two long, thin structures that lead to the hollow, softly lined uterus
D. is one of two walnut-sized organs located deep inside a woman's abdomen

Correct answer: B

Rationale: The correct answer is B. The corpus luteum is a temporary endocrine structure in the ovary that forms after ovulation. It secretes hormones, particularly progesterone, which help prepare the uterine lining for possible implantation of a fertilized ovum. This process is crucial for maintaining a potential pregnancy. Choices A, C, and D are incorrect. Choice A is inaccurate as fertilization typically occurs in the fallopian tubes. Choice C describes the fallopian tubes, not the corpus luteum. Choice D refers to the ovaries, not specifically the corpus luteum.