You may not be used to reading beyond the first few lines of any book or article that chances by, so I'll help out a bit. This, from the bottom of your link, and one click away...
Alarms.org is the official site of the National Council for Home Safety and Security. On Alarms.org, consumers will find important research, articles, reports, and everything else they need to know about home security and safety. A member directory is forthcoming. The National Council for Home Safety and Security is a national trade association comprised of licensed alarm installers, contractors, and other relevant trade groups across the United States.
Commercial interest does not guarantee bias, or disqualify any source you seek accurate information from.
But use your head.
Just sayin (edited)