DrHan Plans a Large-Scale Panel Study,with Prospective Design,and Secures Funding

Multiple Choice

Dr.Han plans a large-scale panel study,with prospective design,and secures funding.There are many challenges to the project,and in an effort to minimize attrition,he

A) uses two different samples at two different times.
B) incentivizes participants with moderate cash payments.
C) establishes causality by collecting data at two different times.
D) increases the sample size for an initial national survey.