The Associated Press-GfK poll on the assassination of John F. Kennedy was conducted by GfK Roper Public Affairs & Corporate Communications on April 11-15. It is based on landline telephone and cellphone interviews with a nationally representative random sample of 1,004 adults. Interviews were conducted with 601 respondents on landline telephones and 403 on cellphones.
JFK, 50 years later: How the AP-GfK poll was conducted
