Questionnaire is a research instrument with questions for gathering information. First questionnaire developed by Statistical Society of London in 1838. Dean Milles' Questionnaire of 1753 is one of earliest questionnaires
Likert scale was created by Rensis Likert in 1930s. It measures agreement or disagreement with statements about stimulus objects. Commonly used with odd and even measurement scales
Customer questionnaires help collect first-hand feedback about service quality. 63% of customers expect companies to anticipate their needs. Questionnaires save time and cost compared to in-person interviews
Likert scale is a forced-choice questionnaire with extreme response options. Developed by Rensis Likert in 1932 to measure individual attitudes. Provides linear set of responses increasing or decreasing in intensity
CSAT surveys measure customer satisfaction with products and services. Surveys can be delivered through various channels like email and in-app pop-ups. CSAT calculates percentage of satisfied customers divided by total respondents
Developed by Rensis Likert in 1932, measures customer perceptions through rating scales. Allows respondents to choose from agreement, frequency, importance, quality, or likelihood options. Provides granular feedback and benchmarks for improving customer experience