Why are questionnaires considered advantageous in research?

Questionnaires are considered advantageous in research primarily because they are easy to collate data. This means that they can be designed to gather responses from a large number of participants efficiently, allowing researchers to collect quantitative data that can be readily analyzed. Since questionnaires often utilize standardized questions, the responses can be easily quantified and organized, supporting the application of statistical analysis. This simplicity in data collection makes it practical for researchers to manage and interpret large datasets, enhancing the reliability and validity of the research findings.

In contrast to this, other options present characteristics that do not align with the typical advantages of using questionnaires. For instance, personalized feedback is usually more indicative of qualitative methods like interviews, which may not provide the same level of structure or ease in data analysis. The notion that they can be difficult to analyze contradicts their fundamental benefit, as structured data is typically easier to manage. Lastly, the assertion that extensive training is required to use questionnaires is misleading; in fact, they are designed to be straightforward, often requiring minimal training for researchers to implement effectively.