Which of the following studies would be considered longitudinal?
a. A study of the effects of high sugar consumption on the health of children and adults
b. A study of the development of babies a month after birth and then again at age five
c. A study of post-recession unemployment rates
d. A study of soil erosion during the Asian monsoon season in 2015
A longitudinal study involves repeated observations of the same variables over a period of time. Based on this definition, the study that would be considered longitudinal is:
b. A study of the development of babies a month after birth and then again at age five.
This study involves observing the same subjects (the babies) at multiple points in time (at one month and again at age five), which is characteristic of longitudinal research. The other options do not involve repeated observations of the same