RESEARCH METHODOLOGY

Detailed explanation-1: -A longitudinal study, like a cross-sectional one, is observational. So, once again, researchers do not interfere with their subjects. However, in a longitudinal study, researchers conduct several observations of the same subjects over a period of time, sometimes lasting many years.

Detailed explanation-2: -Whereas a trend study samples a population whose members may change over time, a cohort study samples a particular population whose members do not change over the course of the survey.

Detailed explanation-3: -Survey research has historically included large population-based data collection. The primary purpose of this type of survey research was to obtain information describing characteristics of a large sample of individuals of interest relatively quickly.

Detailed explanation-4: -The advantages of open-ended questions are that they gather opinions and thoughts from respondents, offering much deeper, more thorough, often subjective information.