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Review and then observe
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Types of scaling Nominal (difference) Ordinal (magnitude)
Interval (equal intervals) Ratio (true zero)
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What types of scales are these?
1. October 22, 1850 (year of Fechner’s law) 2. number of alarm calls by a chickadee in one hour 3. third place in a beauty contest 4. having the fifth highest grades in a class of 29 people 5. being a sophomore in college 6. Thurstone scale 7. Guttman scale 8. Likert scale 9. Semantic differential
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Reliability and validity
Concept Split half Odd-even Internal-reliability Test-retest Extraversion .38 .37 .51 .99 Individualism .30 .16 .41 .96 Extraversion2 .09 .50 Lowering the drinking age .49 .82 .79 .97 Level of importance of household pets .53 .85 .89 Children .59 .68 .70 na Belief in social media usage having an impact on academics .18 .57 .63
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Proposal ideas
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Types of data Quantitative Qualitative
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Types of studies Observation Survey Experiment Quasi-experiment
Small n
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Observation Why do one? Systematic (structured) observation
Ethological observation
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Steps in systematic observation
Find an observable measure Select setting and mode of observation Select sampling strategy Train the observers Inter-rater reliability Analyze the data
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Book organization vs mine
Naturalistic (nonparticipant) Disguised Undisguised Participant (participant) Disguised (covert) Undisguised (overt) Structured (systematic) Case study Archival Content analysis Systematic vs. Ethological Then separately: Participant Covert Overt Nonparticipant Case studies Deviant case analysis Archival Content analysis
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Observation
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