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 Table of Contents    
LETTERS TO THE EDITOR
Year : 2018  |  Volume : 50  |  Issue : 3  |  Page : 143-144
 

Social desirability bias: A confounding factor to consider in survey by self-administered questionnaire


1 Department of Physiology, MKCG Medical College, Ganjam, Odisha, India
2 Department of Physiology, Medical College and Hospital, Kolkata, West Bengal, India

Date of Submission07-Jan-2017
Date of Acceptance11-Jul-2018
Date of Web Publication16-Aug-2018

Correspondence Address:
Dr. Himel Mondal
Department of Physiology, MKCG Medical College, Ganjam - 760 004, Odisha
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijp.IJP_15_17

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How to cite this article:
Mondal H, Mondal S. Social desirability bias: A confounding factor to consider in survey by self-administered questionnaire. Indian J Pharmacol 2018;50:143-4

How to cite this URL:
Mondal H, Mondal S. Social desirability bias: A confounding factor to consider in survey by self-administered questionnaire. Indian J Pharmacol [serial online] 2018 [cited 2022 Dec 6];50:143-4. Available from: https://www.ijp-online.com/text.asp?2018/50/3/143/239063




Sir,

We read a short communication titled “Perception of pharmacists regarding over-the-counter medication: A survey” by Ravichandran A and Basavareddy A published in your journal.[1] The article evaluated the knowledge, attitude, and practice of the pharmacists toward dispensing the over-the-counter (OTC) drugs. Overall, the article was able to express the study protocol. However, we felt that more clarity about sample population, details of the instruments (i.e., survey questionnaire), and some additional discussions would make the article superior. Hence, we intended to share this correspondence.

The study was aimed at testing the knowledge, attitude, and practice of the “pharmacists” as evident from the Abstract and Introduction of the article. However, the authors had distributed the survey questionnaire to “pharmacists and pharmacy attendants.” Furthermore, according to the result of the study, only the responses of “pharmacists” were taken. The reason for exclusion of responses obtained from pharmacy attendants was not explained. Hence, “pharmacy attendants” might be a typing error!

According to the Materials and Methods section of the abstract, the survey response rate was 80% (80 out of 100). Surprisingly, in the Materials and Methods section in the article body, it was described as 74.6% (112 out of 150). The authors could be more cautious about this discordant sample size. While writing article in IMRaD format,[2] it is better to write the sections of the article as shown in [Figure 1].[3],[4] A thorough revision by all authors might help detecting this error.
Figure 1: Flowchart of writing style of sections of an article in IMRaD format

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For the study, a pretested questionnaire was used as the survey instrument with 16 questions. More details about the questionnaire, especially the response options (e.g., yes, no, and don't know tick box; Likert-type scale) for the questions, would give us a better idea about the instrument. The authors had taken responses of 10 subjects for calculating the Cronbach's alpha. However, those who responded during pretesting of the scale for internal consistency – “pharmacists only” or “pharmacists and pharmacy attendants” – remain unanswered. The internal consistency (alpha) obtained for a questionnaire from a particular sample may be invalid if administered to a different sample.

The description of the survey questionnaire provides an obscure view about its structure. According to the authors' description, the first part of the questionnaire was used to record demographic details, qualification, specialization, and “knowledge” of OTC medication. Investigators forgot to mention the number of questions used to test the “knowledge.” According to the authors, the second part of the questionnaire was intended to gather information about the “acceptance and popularity” of OTC drugs among the “Kolar population.” In this statement, there were two confusing terms. First one was the “acceptance and popularity.” If this was the second part of the questionnaire, where is the described 16-item questionnaire to test the “attitude and practice?” Another erroneous broad term “Kolar population” was the second one. The study was concerned about pharmacists, not the population.

It is an alarming issue that many of the pharmacy shops run with a rented certificate of a pharmacist, while the certificate holder is working in another setting.[5] Hence, in the sample, some respondents might not have Bachelor of Pharmacy degree or Diploma of Pharmacy. In addition, the worker in the pharmacy might be reluctant to admit that illegal activity. In the study, the researchers used a self-administered questionnaire. They collected demographic data in the questionnaire. This increases the chance of reluctance, even though the aim of the study is described to the participants. Hence, “social desirability bias” may be a confounding factor in the study.[6] An additional discussion about this might enrich the article.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
 » References Top

1.
Ravichandran A, Basavareddy A. Perception of pharmacists regarding over-the-counter medication: A survey. Indian J Pharmacol 2016;48:729-32.  Back to cited text no. 1
[PUBMED]  [Full text]  
2.
Desai M. Writing an effective manuscript: Editor's perspective. Indian J Pharmacol 2008;40:135-6.  Back to cited text no. 2
[PUBMED]  [Full text]  
3.
Kallestinova ED. How to write your first research paper. Yale J Biol Med 2011;84:181-90.  Back to cited text no. 3
    
4.
The Structure, Format, Content, and Style of a Journal-Style Scientific Paper. USA: Department of Biology, Bates College. Available from: http://www.abacus.bates.edu/~ganderso/biology/resources/writing/HTWsections.html. [Last accessed on 2018 Jun 20].  Back to cited text no. 4
    
5.
Sural A. Govt. to Verify Pharmacists' Licences. The Times of India; 15 January, 2016. Available from: http://www.timesofindia.indiatimes.com/city/chandigarh/Govt-to-verify-pharmacists-licences/articleshow/50588252.cms. [Last accessed on 2017 Jan 07].  Back to cited text no. 5
    
6.
Adams SA, Matthews CE, Ebbeling CB, Moore CG, Cunningham JE, Fulton J, et al. The effect of social desirability and social approval on self-reports of physical activity. Am J Epidemiol 2005;161:389-98.  Back to cited text no. 6
    


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