Reference no: EM132777958
The earlier one starts to abuse alcohol, the lower the hippocampal volume. People were asked when they started using alcohol and brain MRIs scans were used to measure volume of the hippocampus.
What was the IV and the DV(s) for the breastfeeding article posted on Canvas this week?
IV: ______________________________ (what different groups were made by manipulating this variable (grouping by)? What are the groups?
DV(s): ________________________________________________________ (there can be more than one!)
What did the results show? Were there group differences in the DV(s)? If so, which?
What type of Developmental Design: Longitudinal OR Cross-Sectional?
Pregnant mothers receive visits from home care nurses in the last trimester of pregnancy, then 12 more times during their child's two years to see if nurse-family support affects child outcomes.
Children of mothers who used cocaine during pregnancy are tested as infants, then preschoolers, then in middle childhood to see if there is a relationship between prenatal cocaine exposure and child outcomes.
Grade schoolers vs. middle schoolers vs. high schoolers (on the same day) are all asked what their musical preferences are to see if preferences differ by age.
Kids are asked what their musical preferences are in grade school, then again in middle school, then again in high school to see if they change with age.
A group of 20-year-olds are compared to 40-yr olds and 60-yr olds on hand strength.
Marathon speeds are compared for 30- and 50- and 70-year-olds during the 2015 Boston Marathon.
A group of runners who have participated in the marathon for the past 5 years were followed to examine how age is related to their running times.
A group of 3-month-olds, a group of 6-month-olds and a group of 12-month-old infants were compared on number of hours they slept each day to see how length of sleeping changes with age.
Research Question: Does happiness change with age? Explain how you'd test this with each design
Cross-sectional Design:
Longitudinal Design:
Which is faster? Which takes fewer subjects? Which is less expensive? What are cohort effects and how do they affect each type of design?