steps in research
TRANSCRIPT
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STEPS IN RESEARCH
Dr.Vineetha.KDepartment Of Public Health Dentisry
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1. Choosing your topic2. Review of literature3. Formulating research
question 4. Development of working
hypothesis5. Selecting the research
design
6. Sample size estimation
7. Collecting the data
8. Analysis of data
9. Preparation of report
10. Publishing the study
CONTENTS
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CHOOSING YOUR TOPIC1
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TOPIC OF INTERESTPersonal interest &
Background knowledge
Literature and other information
Research priorities in the organization
Wide and “out of the box”
thinking
Discussion with guides and colleagues
Problem faced in own area of work earlier
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REVIEW OFLITERATURE2
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QUALITY NOT THE QUANTITY
“Gives theoretical rationale of problem being studied, what research has been done and
how it relates to the problem”
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Why perform literature review?
Give the big picture of the field. Introduce the works that you will use. Introduce the limitations of these works,
and why they don’t solve your problem. Give hints on what your solution will
have to address.
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APPROPRIATE PLACES TO SEARCHGeneral info
• HON certified sitesSystematic reviews/•Web Search Engines – Google
Specific query
•PubMed, Scopus, Google Scholar database etc
Systematic reviews/Meta‐analysis / EBMs
•Cochrane Library•Map of Medicine etc
Archived full text articles
•Free Open Access•Fee Based – From Libraries
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FORMULATING THE
RESEARCH QUESTION
3
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“ASK A QUESTION,SOLVE A PROBLEM”
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Extensive literature search
Identify research gaps
Prioritise them as per your feasibility
“Zero in” on a research question for your study
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P• POPULATION
I• INTERVENTION
C• COMPARISON
O• OUTCOME
T• TIME
For adult patients, will the use of a powered toothbrush, compared to a manual toothbrush, result in reduction in plaque and/or gingivitis?
P I
C O
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Research question should pass The ‘so what?’ test
• Feasible– Adequate number of participants, technical expertise & Resources
• Interesting
• Novel– Confirms, refutes or extends previous findings– Provides new information
• Ethical– Amenable to a study that ethics committee will approve
• Relevant– Advance scientific knowledge, improve practice, influence policy
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4FORMULATION OF HYPOTHESIS
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“A tentative explanation for certain phenomena, or events
which have occurred or will occur”
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• Working hypothesis is a tentative assumption.
• Describes concretely what is expected in a research study
• Hypothesis should be very specific and limited.
• Helps to keep the researcher on the right track.
• It also indicates the type of data required and the type of methods of data analysis to be used.
DEVELOPMENT OF A WORKING HYPOTHESIS
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Characteristics of good hypothesisSimple
• One exposure• One outcome
Specific• No ambiguity about studyparticipants/variables
Stated in advance • Written at onset• Focused on primaryobjective
Powered tooth brush has more or equal antiplaque efficacy when compared to manual tooth brush.
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SELECTING THE
RESEARCH DESIGN6
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“A detailed outline of how the research is going to take place”
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RESEARCH DESIGNS
QUALITATIVEQUANTITATIVE MIXED
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SELECTING THE SAMPLE7
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▪“Procedure by which some members of the population are selected as representatives of the entire population”
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SAMPLE SIZE
How large should my sample be?Ans:It depends…
• Large enough to be an accurate representation of the population.
• Large enough to achieve statistically significant results.
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Probability samples• simple random
sampling• systematic sampling• Stratified sampling• Cluster sampling
SAMPLE DESIGN
The sample design to be used must be decided by the researcher taking into consideration the nature of the inquiry and other related
factors.
Non-probability samples
• Convenience sampling
• Judgment sampling• Quota sampling
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ETHICS
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INFORMED CONSENT
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COLLECTING THE DATA8
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“WHAT GETS MEASURED GETS MANAGED”
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• It is necessary to collect data that are appropriate.
• Primary data can be collected through experiment or through survey.
• In the case of a survey, data can be collected by any one or more of the following ways:
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SECONDARY DATA
Data previously collected for any
purpose other than the one at hand.
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ANALYSIS OF THE DATA9
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“If the statistics are boring then you have got the
WRONG NUMBERS”
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ANALYSIS OF DATA
The ‘raw’ research data needs to be edited, tabulated and analyzed to find the results and to interpret them.
– the method used may be manual or computer based.
– The analysis plan follows from the research objective of the study.
– Association and relationships of variables are identified and discussed in the light of the specific problem.
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SIGNIFICANCE BIAS
Statistically significant results have been shown to be three times more likely to be published than papers with null results. K.Dickerson et al,1987
MISUSED AND MISINTERPRETED
DOES NOT SUPPORT HYPOTHESIS
ITS ONLY A TOOL TO REJECT NULL HYPOTHESIS
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PREPARATION OF REPORT10
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Quotations are commonly printed as a means of inspiration and to invoke philosophical
thoughts from the reader.
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The main text of the report should have the following parts:
(a) Introduction
(b) Summary of findings
(c) Main report
(d) Conclusion
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At the end of the report,
• Appendices should be enlisted in respect of all technical data.
• Bibliography, i.e., list of books, journals, reports, etc. consulted, should also be given in the end.
• Index should also be given specially in a published research report.
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REFERENCING SOFTWARES
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PUBLISHING THE STUDY11
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• Scientific writing• Original / full research reports• Short communications• Case stories• Systematic reviews / meta-analysis• Books or book chapters• Academic thesis• Conference abstracts
PRESENTING YOUR RESEARCH
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PLAGIARISM
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• Quoting verbatim without due acknowledgement of the source;
• Paraphrasing by changing some of the words, or the order of the words, without due acknowledgement of the source;
• Using someone else’s ideas without due reference;• Cutting and pasting from the internet to make a
pastiche of online sources;• Submitting someone else’s work (includes group
works without clear identification of who did the work);
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Direction of scientific research Not determined by the pressure to win the
‘significance lottery’
But Systematic, hypothesis-driven attempts to fill holes in
our knowledge.
CONCLUSION
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REFERENCES
1. Kothari CR, Garg G. Research methodology-methods and techniques.third edition. Delhi: new age international(P) Limited;2014
2. Kumar R. Research methodology. Fourth edition. New Delhi: sage publications;2015
3. World health organisation. Health research methodology – a guide for training in research Methods. Second edition.
4. ICMR Health research fundamentals.
5. Dickersin, Kay, et al. "Publication bias and clinical trials." Controlled clinical trials 8.4 (1987): 343-353.
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THANKYOU!