The Gallup representative in the Dominican Republic, Rafael Acevedo has given some possible reasons for the marked difference in the results of one poll contracted by a business group that took place on 8-12 January 2016 and another from 24 and 27 January 2016 nationwide with a sample size of 1,200.
The 8-12 January poll showed Medina with 57% and Luis Abinader (PRM) with 27.8%.
The 24-27 January poll showed Medina with 51.8% and Luis Abinader with 35.7%.
Acevedo said that when responding to the 8-12 January poll the respondents were still in holiday mode, which was no longer the case in 24-27 January, when reality began to sink in.
Acevedo said this effect is known as “lagging effect.”
A second probable reason for the difference could be political polarization, explained Acevedo. He explains this happens when followers focus on two candidates.
The 51.8% vote for Medina reported by Gallup makes a second round much more likely than with the previous 57%.
Rafael Acevedo explica el porqué de las diferencias entre encuestas
http://elnacional.com.do/acevedo-defiende-honestidad-gallup/