HS305 Research Methods for Health Sciences
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HS305 RESEARCH METHODS FOR HEALTH SCIENCES
Audio Seminar!
Please be sure your speakers are on!1
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AGENDA
Brain TeaserKey TermsReview of unit 9 paperReview of descriptive statisticsDescriptive statistics and
research designs
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PERSONAL GOAL FOR SEMINARSCreate community of shared
learnersProvide a summary of material
from the weekAnswer questions; clarify
information as needed
HAVE FUN!
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BRAIN TEASER
Interpreting information
Where do 4 and 9 go in the following progression?
8, 11, 15, 5, 14, 1, 7, 6, 10, 13, 3, 12, 2
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BRAIN TEASER
Interpreting information
What explains the following placement for 4 and 9?
8, 11, 15, 5, 4, 14, 9, 1, 7, 6, 10, 13, 3, 12, 2
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KEY TERMS
Data Set Nominal Data Ordinal Data Interval Data Ratio Data Normal Distribution
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UNIT 9 PROJECT: PRACTICAL APPLICATION PARTS 1 & 2Part 1: Data
Click on spreadsheet from the assignment sign
Download to your computerGo to our text companion site
Part 2: Follow companion site directions to calculate the statistics for each of the two groups on the spreadsheet
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UNIT 9 PROJECT: GETTING TO THE CORRECT DIRECTIONSUsing Excel to compute descriptive statistics Download spreadsheet to your computer from
assignment site Go to
http://wps.prenhall.com/chet_leedy_practical_8/23/6131/1569569.cw/index.html
Click on down arrow and select chapter 11 From menu at left click on Projects Select Project 11.1 from middle screen Click on Analysis 1: Computing the descriptive
statistics for group 1 Use process to compute statistics for each of two
groups in scenario
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UNIT 9 PROJECT: PRACTICAL APPLICATION PART 3Short paperDescribe the two groups and
statistics for each groupAnalysis: what conclusions can
you reach based on the statistics?Analysis of at least 2 problems
with data set for making conclusions about exercise and weight
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PROJECT REQUIREMENTS
Be thorough Summarize, do not copy Review grading rubric in weekly
announcement before submitting Ask questions if needed!
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WRITING REQUIREMENTSOrganize your paper wellBe clear and conciseCheck spelling and grammarUse APA formattingNEVER plagiarize!
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PURPOSE OF STATISTICS
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PURPOSE OF STATISTICS
Numerical tools that:Describe information Illustrate trendsAllow comparison of different
groups Allow comparison of sample to
population
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BASIC TYPES OF STATISTICS
Descriptive Statistics – describe the characteristics of a population
Inferential Statistics – use sample data to compareSample to populationOne sample to another
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CAUTIONStatistics appear to be “facts”Statistical tools depend on
levels of measurement of variables
It is important to remember that statistics are easily misused
Review definitions and procedures of studies carefully
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DESCRIPTIVE STATISTICSMeasures to condense data –
include counts and cumulative counts and totals
Measures of central tendency – “average” or most likely score
Measures of variability – how far away values are from each other
Measures of relationships - correlations
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MEASURES OF CENTRAL TENDENCY
Statistics that describe the average, typical or most common value for a group of data
Three measures of central tendency
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MEASURES OF CENTRAL TENDENCYStatistics that describe the
average, typical or most common value for a group of data
Three measures of central tendencyMeanMedianMode
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STATISTICS: EXAMPLE FROM COMPANION SITE
Measures of Central Tendency
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MEASURES OF VARIABILITYDescribe how spread out values are
in a distribution of valuesRange: distance between highest
and lowestPercentile: a datum point below
which lies a certain percentage of values in distribution
Standard deviation: the average variation of all values from the mean score
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STATISTICS: EXAMPLE FROM COMPANION SITE
Measures of Variability
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MEASURES OF RELATIONSHIPS Concern the correlations between
variablesCorrelation coefficients
Computed by pairing the value of each subject on one variable (X) with the value on another variable (Y)
Can vary from -1.00 to +1.00Several measures used for
correlations
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CORRELATIONS
Positive Negative No Correlation
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SCIENTIFIC RESEARCH PROCESS STEP 4A. IDENTIFY RESEARCH DESIGN
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SCIENTIFIC RESEARCH PROCESS STEP 4A. IDENTIFY RESEARCH DESIGN
Research Design = the process for conducting the study
Qualitative designsQuantitative designsMixed Methods
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STATISTICS & RESEARCH DESIGN
Review: What is qualitative research?
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STATISTICS & RESEARCH DESIGN
Review: What is qualitative research?Research designs aimed at
achieving an in depth understanding of a phenomenon
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SCIENTIFIC RESEARCH PROCESS STEP 4A. RESEARCH DESIGNS
Qualitative DesignsCase StudyEthnographyPhenomenologicalGrounded TheoryContent analysisHistorical research
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STATISTICS & RESEARCH DESIGN
Review: What is quantitative research?
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STATISTICS & RESEARCH DESIGN
Review: What is quantitative research?Research designs aimed at
finding out statistical patterns of variables related to a problem
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SCIENTIFIC RESEARCH PROCESS STEP 4A. QUANTITATIVE RESEARCH DESIGNS
Experimental True
experimentQuasi-
experimentalEx Post FactoFactorialMeta-analysis
DescriptiveObservation Studies Correlational
Research Developmental
Designs Survey Research Checklists and
Rating Scales
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SCIENTIFIC RESEARCH PROCESS STEP 4A. EXPERIMENTAL QUANTITATIVE RESEARCH DESIGNS
Mixed Methods Combine aspects of qualitative and
quantitative designsVery commonMost qualitative research includes
some basic descriptive data
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COMMON MIXED DESIGN IN CLINICAL RESEARCH EXAMPLE
Study of juvenile diabetesQualitative: case studyQuantitative: descriptive study
using developmental approach
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WHAT DO RESEARCHERS CONSIDER IN CHOOSING RESEARCH DESIGNS?
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CHOOSING QUALITATIVE V QUANTITATIVE RESEARCH TECHNIQUESDepends on purpose of
researchData availableHow results are expected to be
used
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PURPOSE
From: Table 5.1 Leedy & Ormrod (2010)
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NATURE OF PROCESS
From: Table 5.1 Leedy & Ormrod (2010)
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DATA TYPE AND COLLECTION
From: Table 5.1 Leedy & Ormrod (2010)
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SCIENTIFIC RESEARCH PROCESS STEP 4A. IDENTIFY RESEARCH DESIGN
Research Design = the process for conducting the study
Qualitative designsQuantitative designsMixed MethodsWhich type of design do you think is
preferable? Explain your answer!
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SCIENTIFIC RESEARCH PROCESS STEP 4A. IDENTIFY RESEARCH DESIGN
Research Design = the process for conducting the study
Qualitative designsQuantitative designsMixed MethodsWhich type do you think would work
best in your field? Explain your answer!
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QUESTIONS?
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Unit Questions linkAOL instant message: proflpburchEmail: [email protected] Phone if an emergency: 757-339-7494
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COMING ATTRACTIONS: UNIT 10
Seminar: None
Discussion: Reflecting on what you learned
I hope you will give me your feedback!
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HS305 RESEARCH METHODS FOR HEALTH
SCIENCES
Thanks for Participating!43