Extensive baseline data were collected for all subjects using a baseline home interview, an annual mail questionnaire, and annual clinic examinations.

Another 5,000 subjects also completed the telephone interview and mail questionnaire as part of 11 related studies.

The entire gain in the Conference Board poll this month, which reaches 5,000 households with a mail questionnaire, was attributed to brightening expectations about economic conditions six months from now.

People beg off from face-to-face interviews and discard mail questionnaires as junk.

The method of investigation is a survey by mail questionnaire of a national sample of approximately 5,000 members.

It was done by mail questionnaire from 1988 to 1990.

'They Cannot Do the Job Alone' Teachers from every state were canvassed in two mail questionnaires in the spring and the fall of 1987.

The seminary survey was conducted by mail questionnaires sent to all 211 accredited seminaries and based on 160 responses.

The range of methodologies has also been transformed from traditional mail questionnaires to a wider range including bar-code scanners, internet and SMS.

At 1, 5, and 11 years after projected high school graduation, participants were asked to complete additional mail questionnaires that focused on their work and personal life.