Final answer:
The most ideal method to study the effect of a pandemic on people who experienced it is a longitudinal study, which involves following a group of research participants for an extended period of time.
Step-by-step explanation:
The most ideal method to address the research goal of studying the effect of a pandemic on people who experienced it is longitudinal study. This research design involves following a group of research participants for an extended period of time. By surveying the same group of individuals repeatedly over time, the researcher can gather data on how their experiences and behaviors change as a result of the pandemic.