Psych 350 Exam 2
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| experimental design | manipulation of independent variable with random assignment
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| quasi-experimental design | manipulation of independent variable but no random asssignment
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| non-experimental design | no manipulation and no random sampling
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| two types of measurement: | self-report and behavior
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| random error | variation from true score due to chance
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| bias | systematic variation from true score in a consistent way
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| Reliability: internal consistency | measuring of items
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| reliability: test-retest consistency | measurement overtime also called intra-rater
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| reliability: inter-rater | between different raters
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| reliability: parallel forms | across different versions
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| validity: face | does it look like it is supposed to?
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| validity: content | does it cover all the items?
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| validity: convergent | does the study correspond to other studies of similiar constructs?
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| validity: discriminant | does the study lack correspondence to other studies of different constructs?
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| validity: predictive | does the measure relate to future outcomes?
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| validity: concurrent | does the measure relate to outcomes as you would expect when measured together?
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| simple random sample | randomly pick a subset of a population
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| stratified random sample or area probability | divide the population and randomly sample from the groups
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| cluster random sample | divide the population and randomly select entire groups
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| nonprobability sampling | not everyone has a chance at being selected because it isn't random
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| convenience | readily available group
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| quota | pick participants because they meet predetermined criteria
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| purposive | pick participants based on certain qualities you're studying
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| snowball | participants that already participated recruit other participants
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