The most important aspect of the end of the germinal period in pregnancy is that:
a. the human cells have begun to differentiate and assume specialized roles.
b. the self-sustaining placenta has formed, obtaining nutrients and eliminating waste products.
c. the vascular system is established and begins to force blood to circulate.
d. the neural tube, precursor to the heart and spinal cord, forms.
Ques. 2The first phase of pregnancy is known as the _________ and it typically lasts about __________.
a. gestation stage; two weeks
b. embryonic stage; eight weeks
c. germinal stage; two weeks
d. germinal stage; six weeks
Ques. 3When a researcher is concerned about the extent to which her findings will generalize to other schools beyond the one school she included in her initial research, she is most concerned about:
a. internal validity.
b. external validity.
c. absence of bias.
d. reliability.
Ques. 4A couple already has five sons and they would very much like to have a little girl in their family. What information would a doctor most likely give to this couple who would like to determine the sex of their next child?
a. Hormone therapy prior to conception is the most effective method.
b. Ovulation detectors and special douches are effective in 96 of cases on record.
c. Current medical interventions often cause birth defects.
d. Medical interventions can sort sperm into X- or Y-bearing groups
Ques. 5Test ___________ refers to the accuracy of a test in measuring what it is intended to measure.
a. bias
b. reliability
c. scalability
d. validity
Ques. 6A researcher conducts a study exploring the question, To what extent does the ability of a child to count to twenty before going to kindergarten predict school achievement after the first grade? This study is an example of what type of research?
a. community-based
b. basic
c. applied
d. pure scientific research
Ques. 7Who would be involved in the research process for a community-based research approach to studying the impact of an after-school program on democracy and civic engagement?
a. local citizens and taxpayers in the community
b. employers, social agencies, and business leaders
c. state and federal policy makers
d. institutions that have research laboratories in the community
Ques. 8Suggest a correlational study of the relationship between a cognitive factor and a school achievement variable in middle childhood. Include a description of the sample, the experimental or field setting, and the independent and dependent variables. Why is this design appropriate to answer your research question?
What will be an ideal response?
Ques. 9Suggest an alternative experimental design to assess the effect of culture on middle childhood physical development. Include a description of the sample, the experimental or field setting, and the independent and dependent variables. Why is this design appropriate to answer your research question?
What will be an ideal response?
Ques. 10Suggest an experimental design to assess the effect of an aggressive peer model on an aspect of a school-age child's social development. Include a description of the sample, the experimental or field setting, and the independent and dependent variables. Why is this design appropriate to answer your research question?
What will be an ideal response?
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