| Summary: | 碩士 === 國立臺北大學 === 犯罪學研究所 === 100 === The government has been dedicated to improving the security by installing Closed Circuit Television (CCTV) in recent years. Many surveys revealed a high level of public consider installing CCTV is a good way to reduce the crime and showed that the presence of cameras in the city has made people feel safer. The policy of installing CCTV has received widespread support. In Taiwan, it is estimated that the government spent an average of 1.1 billion dollars to install and repair CCTV system every year. This shows that the crime prevention effect of CCTV is an important issue and deserves our careful confirmation. Currently, many studies assess the crime prevention effects of CCTV by interviewing police and citizen however a few study used quantitative methods.
The purpose of the study is to evaluate the crime prevention effects of CCTV on thefts and residential burglary in Taipei. A quasi-experimental research design, the study select 3 experimental and 3 control groups after taking account of environmental characteristic and development pattern. Using geographical information system (GIS) to mark off the experimental area. These experimental areas cover the shopping, business and residential areas of the city. Crime data was sourced from Taipei City Police Department, covering theft and residential burglary taking place from July 2008 to the end of December 2011, for 42 months before and after camera installation dates.
Finally, there was no significant difference on theft and residential burglary crime between experimental group and control group. Examining the relationship between crime means before and after CCTV installation. As a result, there was no significant difference after installing CCTV. However, an independent samples t test of the experimental group, within the 50 and 100 meter buffers reach statistical significance.
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