WASHINGTON — Americans’ confidence in all three branches of government is at or near record lows, according to a major survey that has measured attitudes on the subject for 40 years.

The 2014 General Social Survey finds only 23 percent of Americans have a great deal of confidence in the Supreme Court, 11 percent in the executive branch and 5 percent in Congress. By contrast, half have a great deal of confidence in the military.

The survey is conducted by the independent research organization NORC at the University of Chicago. Because of its long-running and comprehensive set of questions about the public, it is a highly regarded source of data about social trends.