MR : 100 Point scale and Longitudinal Study

Longitudinal survey 
 A longitudinal survey is a survey in time. The survey may be given weekly, monthly, annually, biannually, or even more spaced out. The point is, the survey focuses on how perceptions and opinions change over time.  They often include the exact same people originally surveyed (panel survey) or people of a similar demographic (cohort survey).

            A study headed by University of Wisconsin-Madison researcher Aric Rindfleisch focused on eliminating data error in longitudinal and cross sectional surveys, and detirmingin which method was best for market researchers.  The final verdict was a little split.  Basically longitudinal surveys are best for eliminating data error through a more thorough examination process, but cross sectional surveys were adequate for the job, because they offer researcher a quicker answer.