3.1,3.2

Researchers are interested in whether a nutritionally poor diet during pregnancy increases the likelihood of birth defects. Which of the following most accurately explains why a correlational research design is the best option for investigating this question

Because of ethical concerns, participants could not be randomly assigned to groups.

Dr. Shirah believes irritable infants grow up to be irritable adults. Which of the following best represents Dr. Shirah's beliefs? Responses

Nature view

Sarah is the mother of an eight-month-old boy named Connor. Connor has been struggling to sit up on his own without assistance. While visiting a friend, Sarah noticed that her friend's five-month-old daughter was sitting up with ease. Which of the following explanations would a developmental psychologist generally offer to Sarah?

Although sitting upright with no assistance is a major milestone, many babies will develop within a range of ages.

What conclusion can be drawn from the data presented in the figure about sensitivity to teratogens during prenatal development

Teratogens are least likely to impact the development of the heart after 9 weeks

The debate over whether development occurs gradually, without discernible shifts, or through a series of distinct stages is termed

continuity vs. discontinuity

A developmental psychologist who is using a visual cliff is most likely studying which of the following

depth perception

Melissa reads in a parenting magazine that the average age at which children first walk on their own is twelve months old, and most children walk within the range of nine to seventeen months old. The article is discussing the concept of Responses

developmental norms

Preschoolers often have trouble buttoning shirts due to less-developed

fine motor skills

In which of the following types of research are the same children tested periodically at different points in their development?

longitudinal

Which of the following research methods is being used if the same subjects are tested at two, four, and six years of age?

longitudinal

Genie was a girl who endured abusive and neglectful conditions and was deprived of language exposure until she was rescued at age 13. Despite remediation, Genie was unable to learn to speak fluently. Historically, this case study was used to demonstrate the effects of

sensitive periods

Researchers hypothesize that the older a baby is when it begins to crawl, the longer it will take the baby to stop exhibiting earlier rocking behaviors. The researchers go into the infant room of a day care center every day for six weeks. Every time a baby rocks, the researchers record it. They document which babies are already crawlers and at what age each started crawling. What will help the researchers with their investigation?

Their knowledge that rocking behavior develops before crawling behavior and that rocking behavior eventually goes away once crawling behavior begins

Which of the following statements best explains why using an experimental research design is inappropriate in studying human development?

Direct, long-term manipulation of a child's environment during an experiment is unethical

Maria is a thirteen year old child born with deafness to parents who can hear and who also live in a remote, rural area. Since birth, her parents have provided love, nourishment, educationally enriching toys, and developed their own hand signals to communicate with her about basic necessities. However, Maria did not begin to learn sign language until she was twelve and the family moved to a city and encountered members of a deaf community. Maria has found it very difficult to learn sign language, no matter what her instructors try. Which of the follow concepts best explains Maria's difficulty learning sign language?

A sensitive period

Research on a critical period during the acquisition of second languages indicates that which of the following statements is true?

The older an individual is, the more difficulty he or she will have with second-language pronunciation