DrAaron Adamson Uses Telephone Surveys to Measure Life Satisfaction Across

Multiple Choice

Dr.Aaron Adamson uses telephone surveys to measure life satisfaction across Canada.When Dr.Adamson and his research assistants phone participants,they ask them to report responses to questions by indicating whether they "strongly agree," "agree," "strongly disagree," or "disagree." Which of the following is he using?

A) Standard scale
B) An index
C) Graphic rating scale
D) Likert scale
E) None of the above