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Washington, D.C. locator map.

What State Is Washington, D.C. In?

Philippine President Corazon Aquino (b. Maria Corazon Cojuangco) greets officials in airport terminal. Andrews Air Force Base, U.S., Maryland September 15, 1986. President of the Philippines 1986-1992.

6 of the First Women to Become Heads of State

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

American black bears (Ursus americanus), mother with cub in forest.

Why Do Some Animals Hibernate?

Globe South America, map

What’s the Difference Between Hispanic and Latino?

United States elections portal page linking to each election interactive

A History of U.S. Presidential Elections in Maps

United States Electoral College votes by state

How Many Electoral College Votes Does Each U.S. State Have?

questionnaire

research device

Learn about this topic in these articles:

opinion polling

In public opinion: Phrasing of questions
Questionnaire construction, as with sampling, requires a high degree of skill. The questions must be clear to people of varying educational levels and backgrounds, they must not embarrass respondents, they must be arranged in a logical order, and so on. Even experienced researchers find it…
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use by Hall

In G. Stanley Hall
…discovered the value of the questionnaire for psychological research. Later he and his students devised more than 190 questionnaires, which were instrumental in stimulating the upsurge of interest in the study of child development.
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