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Collecting Quantitative Data

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Collecting Quantitative Data Creswell Chapter 6 Who Will You Study? Identify unit of analysis Specify population Describe sampling approach Class = convenience sample ... – PowerPoint PPT presentation

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Title: Collecting Quantitative Data


1
Collecting Quantitative Data
  • Creswell Chapter 6

2
Who Will You Study?
  • Identify unit of analysis
  • Specify population
  • Describe sampling approach
  • Class convenience sample
  • Describe relevant characteristics

3
Permissions
  • IRB VSU and administrator
  • Student assent
  • Parent consent
  • Colleague assent

4
What for?
  • Any activity outside normal instruction
  • Activities
  • Survey/questionnaires
  • Interview
  • Audio or video records
  • Use of student work samples

5
What information?
  • Consider RQs
  • Consider triangulation
  • Three Es
  • Consider covariates
  • Disaggregated subgroups
  • Include field notes

6
Types of Measures
  • Performance
  • Attitude self-report
  • Behavior - observable
  • Facts - archival

7
What Instruments?
  • Locating an instrument (p.160)
  • Standardized test prep CRCT
  • Norm-referenced STAR
  • Widely used instrument AR, DIBELS
  • Used in research
  • Creating an instrument

8
Reliability
  • Scores are stable consistent
  • Test-retest
  • Alternative forms
  • Split half
  • Inter-rater

9
Threats to Reliability
  • Questions or tasks are unclear
  • Data collection procedures are unclear
  • Assessment criteria are unclear
  • Student factors

10
Validity
  • Assessment
  • Makes sense
  • Is meaningful
  • Measures what is intended

11
Types of Validity
  • Content
  • Items represent target
  • Criterion
  • Scores related to outcomes
  • Construct
  • Scores are meaningful and fullfil purpose

12
Threats to Validity
  • Poor research design
  • Poorly designed assessments
  • Irrelevant assessments
  • Inability to predict
  • Participant factors

13
Scales of Measurement
  • Nominal (categories)
  • Ordinal (ranking)
  • Interval e.g. Likert
  • Ratio (true zero)

14
Administration
  • Standardize procedures
  • Use written protocols
  • Record field notes ASAP
  • Ethics
  • Permission
  • Anonymity confidentiality

15
Questions?
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