internet makes large - sample web surveys easy and inexpensive . however , the survey non - response rate is generally high . it is reasonably expected that the survey non - response rate increases as the number of survey questions increases . we propose a partial survey method , in which only a subset of survey questions are distributed to each tester and different testers may receive different questions . then , the tester can spend much less time responding a short survey compared to the full survey , and therefore it is less likely for a tester to decline the survey and hence increases survey response rate . a mixed survey , composed of the partial survey and full survey , is as well as an extrapolation estimator were also proposed and studied . simulation was conducted and showed the partial survey produces less biased estimator for the mean response and regression coefficients than the full survey , but with increased standard error for the estimation . the partial survey provides much less mean squared error for the mean response compared to the full survey .