Research methods
description
Transcript of Research methods
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Research MethodsHS 2196
Sub- group 1
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Objectives Identify the research problem and research topic
in this presentation Identify research and null hypothesis List the types of variables used in the research Discuss about the conceptualization and
operationalization of variables Identify the type of sampling used Discuss about our research proposal and the
ethical considerations
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Research problem
Will drinking coffee affect blood pressure ?If yes, do we need to take note of coffee
drinkers in clinical?
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Research Topic
RELATIONSHIP BETWEEN
CONSUMPTION OF COFFEE OR CAFFEINE
AND BLOOD PRESSURE
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Types of Variables
INDEPENDENT VARIABLE
DEPENDENT VARIABLE
EXTRANEOUS VARIABLE
consumption of coffee
blood pressure
age, mental &physical stress, exercise, habitual coffee drinking, smoking, medical problems
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Hypothesis
There is no significant relationship between consumption of coffee and blood pressure
There is significant relationship between consumption of coffee and blood pressure
ResearchHypothesis(H1)
Null Hypothesis
(H0)
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Conceptualization
Consumption of coffee—consume coffee orally
Blood pressure—pressure exerted by the blood on the arterial walls as the heart pumps blood into the aorta.
(Brooker, 2005)
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OperationalizationConsumption of coffee— drink 150mls coffee(100mg caffeine) within 10 minutes
Blood pressure— measured using a BP set 30 and 60 minutes after drinking coffee
It is generally recorded indirectly in the brachial artery using an electronic device or stethoscope and sphygmomanometer and recorded in millimetres of mercury pressure (mmHg)There are two readings: systolic reading and diastolic reading.
(Brooker, 2005)
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Literature review
(Nurminen, Niittynen, Korpela & Vapaatalo, 1999)
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Literature review
(Nurminen, Niittynen, Korpela & Vapaatalo,1999)
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Literature review
(James, 2004)
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Literature review
Caffeine tolerance diminishes the acute effect of caffeine on blood
pressure, and hypertensive individuals are more susceptible to blood pressure
changes.
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Literature review
(Riken, Rongen & Smits, 2009)
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Literature review
(Buscemi et al., 2010)
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Target population
Sampling
Nanyang Polytechnic nursing students
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SamplingUsing cluster sampling
Step 1:clusters are chosen Year 1 Group A—1
Year 1 Group B—2Year 1 Group C—3Year 1 Group D—4Year 2 Group A—5 ……12 groups in total
Step 2:choose 10 individuals using simple random sampling from each group (cluster)
120 Nursing students to participate in the experiment
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Measuring instruments
2 electronic blood pressure sets of same brand will be used
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Methods of data-collection
Age
Blood Pressure
ASKING QUESTIONS
MEASURING
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Experiment
Control Group Design
O1 X O2 O3 R O1 O2 O3
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Controlled Group(will be given
nothing)
Experiment
Experimental Group
(will be given one cup of coffee)
Cluster (one lecture group of nursing student)
RandomlyEqually
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1 2
1- controlled group2- experimental group
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ExperimentStart
Blood pressure measuring &
record
Control groupDrink nothing
Experimental groupDrink a cup of
coffee
Blood pressure measuring and
record
End listen light music for 30 minutes Blood pressure
measuring and record
listen light music for another30 minutes
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Controlled group data collection
No. Gender
Age Pre-test BP Post-test BP
Systolic BP
Distolic BP
Systolic BP (30mins)
Distolic BP(30mins)
Systolic BP(60mins)
Distolic BP(60mins)
1.
2.
3.
4.
5.
6.
7.
8.
…
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Experimental group data collection
No. Gender
Age Pre-test BP Post-test BP
Systolic BP
Distolic BP
Systolic BP (30mins)
Distolic BP(30mins)
Systolic BP(60mins)
Distolic BP(60mins)
1.
2.
3.
4.
5.
6.
7.
8.
…
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Data analyseData were entered and analyzed with SPSS (Version18):
Compare result measured after 30 minutes and 60 minutes
Compare result between controlled group and experimental group
Male & female
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Feasibility• Confirm the lecture time with one student of the
selected group
• Ensure there is no any lecture or tutorial after the study for the participators
• Ensure that the participators are not allergic to caffeine
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Research ethicsDistribute and explain the consent form -Introduce ourselves-Explain the purpose, procedure of our study-Identify for any allergy-Identify the right to refuse to participate or to withdraw from study without penalty-Offer to answer all questions -Confidentiality is assured(age)
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Conclusion
consumption of coffee
A simple research proposal to do a research on correlation between andBlood pressure Take noted &
apply in clinical area
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References