Questionnaire Advantage in Research Studies

A questionnaire is a structured set of questions used as a primary tool for gathering information in research. It allows researchers to collect data from participants systematically. Understanding the benefits of different research tools helps in designing effective studies.

Evaluating Options for Questionnaire Benefits

The question asks to identify an advantage of the research tool 'questionnaire'. Let's analyze each option:

• Researcher cannot interact with the subject: While often true for self-administered questionnaires, minimizing direct interaction can reduce interviewer bias. However, it can also hinder clarification, making it a characteristic with both pros and cons rather than a clear primary advantage.
• Scope for omitting some items: This implies incompleteness or a lack of standardized structure, which is generally viewed as a disadvantage or limitation in questionnaire design, not a benefit.
• Reduced scope for free expression by subjects: Questionnaires, especially closed-ended ones, limit detailed, open-ended responses. This constraint is typically considered a disadvantage compared to methods like interviews, as it restricts the depth of qualitative data.
• Data can be collected from a widely scattered sample: This is a significant advantage. Questionnaires are highly efficient for reaching respondents spread across large geographical areas. Mail, online, or phone-based questionnaires allow data collection from a diverse and dispersed sample group cost-effectively and with relative ease.

Identifying the Core Advantage

Based on the analysis, the most significant advantage of using a questionnaire, particularly when compared to other methods like face-to-face interviews for large populations, is its effectiveness in reaching respondents who are geographically dispersed. This allows researchers to gather data from a widely scattered sample, which is crucial for studies aiming for broad generalizability.