The drop was the first to happen since President Susilo Bambang Yudhoyono came to power, LSI Executive Director Kuskridho Ambardi said on Sunday.
"The proportion of the public who saw it (the corruption eradication effort) bad or very bad is larger than those who had the opposite perception," he said.
The results of a survey conducted by LSI showed public perception of the government's performance in eradicating corruption reached 40 percent.
LSI data suggested that between 2005 and 2011 the proportion of the public's positive perception of corruption eradication efforts stayed at more than 50 percent.
LSI conducted the survey using 1,220 samples with a number of select respondents interviewed face-to-face. The interview took place from December 8 to 17 last year.
Meanwhile, Corruption Eradication Commission (KPK) leader Bambang Wijanarko said the anti-graft body must be able to develop corruption eradication efforts through a number of activities other than taking action against those involved in corruption cases.
"Looking ahead, KPK must begin to put the public perception of corruption eradication in wider context so it will not merely focus on taking action," he said.
The results of other survey conducted by LSI show KPK ranked fourth with regard to the public opinion about how far government institutions were free from corruption.
LSI noted that the Indonesian military (TNI) was the cleanest corruption free institution (57.2 percent), followed by the Presidential Office (51 percent), the National Police (39.3 percent), KPK (38.5 percent) and Bank Indonesia (38.2 percent). (*)
Editor: Kunto Wibisono
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