NUR3001 Wk8 Handouts
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Transcript of NUR3001 Wk8 Handouts
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NUR 3001
Research
Methods in Health Care
Course Lecturer:
Dr. Mandy Ho 3468 6822 [email protected]
KPC Room 1401
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ContentsData collection in quantitative studies
Types of data-collection methods
Advantage and disadvantages of each data-collection met
Potential sources of bias related to data collection
Reliabilty and of measurement
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Data collection methods
Self-report Observations Biophysiolmeasure
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Questionnaire: question forms
Closed-ended questions:
- Dichotomous
- multiple-choice
- rank-ordered
- forced-choice
- rating
Open-ended questions
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Scale
Likert scale
Composite scales
Visual analog scale (VAS)
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Questionnaires
Social desirabilityRespondent
burden
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Response Bias
Social desirability response set bias
Extreme response set bias
Acquiescence response set bias
Use sensitively wordedquestions
Nonjudgmentalatmosphere Confidentiality
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Observation methods
Structured vs unstructured
Concealment
Intervention
Debriefing
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Observation methods (LoBiondo-wood & Habe
The observations undertaken are consistent
study aim/objectives A standadized and systemic plan for the obse
the recording of data
All of the observations are checked and cont
The observations are related to scientific contheories
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Advantages and disadvantages
Cost (Money, time, manpower and expertise)
Ethical issues
Bias
Validity
Specific target groups
Types of data/purpose of the study
Response rate
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Measurement error
Random/chanc
Systematic/con
Observedscore
Truescore
Error=
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Invalid measure
Affects internal validity
affects external validity
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Sources of measurement errors (Port
Factors contributing to measurement errors:
1. The individual taking the measurement (test
2. The measuring instrument
3. Variability of the characteristic being measu
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To minimize bias in data collection
Adequate training and monitoring of data collec
Blinding of data collectors, concealment of the p
Use valid tools
Ensure privacy
Non-judgemental atmosphere
Triangulation of methods
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Construction of new instruments(LoBiondo-Wood and Haber, 2010)
Define the concept to be measured
Clarify the target population
Develop the items
Assess for content validity
Develop instructions for respondents and us
Pretest and pilot test
Estimate reliability and validity
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Reliability (consistency)
- Stability: test-retest reliability
- Homogeneity (internal consistency): Cronbacsplit-half, item to total correlations
- Equivalence: rater reliability (intrarater, interr
Corr(
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Validity (accuracy)
- Face validity
- Content validity
- Criterion validity: concurrent validity, predict
- Construct validity: factor analysis
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References
Polit, D. F., & Beck, C. T. (2014). Essentials of nursing research: Appfor nursing practice. Lippincott Williams & Wilkins.
Portney, L.G., & Watkins, M.P. (2009). Foundations of Clinical Reseto Practice. (3rd ed.). New Jersey: Pearson/Prentice Hall.
LoBionodo-Wood, G., & Haber, J. (2010). Nursing Research: Metappraisal for evidence-based practice. (7th ed.) New York: Mosb
