Indonesian polling bodies have a negative tendency to perform opinion building, an analyst said on Wednesday.

"Most research institutions failed to portray the real condition of the people, and perform opinion building in favor of their clients while campaigning negatively on the competitors," said Sapto Waluyo, director of the Center for Indonesian Reform.

He cited the Jakarta gubernatorial election as an example. Most survey results show that incumbent Fauzi Bowo's electability is declining while Solo mayor Jokowi's electability is climbing significantly. Sapto said surveyors were only showing the popularity of the candidates instead of their electability.

He said that while Jokowi and his running mate Ahok were popular, this does not mean they will be elected. "There should not be public deception through statistics."