Final answer:
Most self-report questionnaires use Likert scale answers, as they facilitate a nuanced collection of data by allowing respondents to express varying degrees of agreement or disagreement with survey statements.
Step-by-step explanation:
While questionnaires can include a variety of answer types such as yes-or-no, true-false, or open-ended responses, the Likert-type scale is especially traditional in psychological surveys and inventories. Named after Rensis Likert, these scales allow participants to express the degree of their agreement or disagreement with statements, which can produce more nuanced data than simple binary responses. The information gathered through Likert scales is typically quantitative and can be statistically analyzed for research purposes.
Although open-ended questions in surveys can yield a rich, qualitative dataset, revealing personal beliefs and views, they are more complex to organize and tabulate. Likert scales, on the other hand, provide a balance allowing researchers to quantify subjective states and opinions effectively.