Studies that claim to have found weight loss were carried out on animals. Studies involving humans are for the most part badly designed. A few quality studies have been carried out over the years, starting in 1998 with a double-blind, placebo-controlled trial of 135 adults over 12 weeks published in The Journal of the American Medical Association.
Discover 9 of the biggest advantages and disadvantages of questionnaires and how you can make them work in your favor.
For exploratory research open-ended questions help the respondents to better express their views. A mail questionnaire gives the respondent the flexibility to complete it at his convenience. One of the major disadvantages in written questionnaires is the low response rate. Low response results in inaccurate statistical analysis.
The main advantage of using questionnaires is that a large number of people can be reached relatively easily and economically. A standard questionnaire provides quantifiable answers for a research topic. These answers are relatively easy to analyse. Disadvantages. Questionnaires are not always the best way to gather information. A questionnaire does not provide opportunity for the person conducting the study to develop rapport with the study groups. If the area of research is sensitive or confidential in nature, designing questionnaire for such area is an hefty task.
Advantages and Disadvantages of using Questionnaires. This section outlines the key advantages and disadvantages of questionnaire research. All methods have advantages and disadvantages. In choosing a method (or methods) to do research you have to consider what is the most appropriate method (or combination of methods) for . ADVERTISEMENTS: Read this article to learn about the advantages and disadvantages of questionnaire method of data collection. Advantages of Questionnaire: (1) Economical: It is an economical way of accumulating information. It is economical both for the sender and for the respondent in time, effort and cost. The cost of conducting the .