COMM 88 Lecture Notes - Lecture 11: Reduced Cost
Document Summary
Identify/describe attitudes or behaviors in a given target population. Can examine on point in time (one time; snapshot) or track over time (longitudinal) Examine relationships between the attitude/behavioral variables measured. Use different groups of people who differ in the variable of interest. Divide up the population into 3 age groups: 18-40, 40-65; over 65) One sample taken at one point in time. Variables are measured at more than one point in time. Panel - same people each time (ex. Trend - different random samples from the same target population (usually large ones) Ex. poll americans every 10 years for their church-going habits) Cohort - different samples, but of the same cohort (smaller target population) Ex. graduates of ucsb in 2017 and 2018. Ex. survey class of 2017 every 5 years for their employment since graduation. Key problem (and difference with other self-administered surveys): lack of control over sample population. Providing unique urls to control who responds.
