Professor Wong measured the intelligence and temperament of a group of preschoolers. He plans to follow the same group of participants over time and collect similar data when the children are in 3rdgrade, 6thgrade, and 9thgrade. This is an example of which type of research design? A. Case studyB. Experimental designC. Longitudinal designD. Double-blind experiment

The correct answer is letter C

In the longitudinal design, the researcher records information about the participants without changing or manipulating the natural environment. One of the most important characteristics of the cross-sectional study is that it is possible to compare different samples from different time periods.

answer; migrate from a region;

answer; obey the closest relative's wishes;