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20 Cards in this Set
- Front
- Back
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History error
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sys/rand. when the background of the participants effect there response of he/she in an experiment
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Selection error
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sys. when the sample is biased and only contains a certain type of person
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Mortality
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rnd/ sys:when ppl drop out of study
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Maturation
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random; when participants change over the course of the study
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Diffusion of treatment
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rand: IB error passing on info
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Response Style
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sys: giving participants different opportunities to respond
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Order effect
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sys: the order in which tasks are givin; countereffect-participants will like the 2nd choice better
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hawthorne effect
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random: when participants change behavior cuz there in a study
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Placebo effect
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rand: participants think there getting better
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experimentor bias
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sys: rosenthal effect;researcher gives off clues to participants about how to perform: demand characteristics
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Instrumentation
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sys: inconsistency among data because of changing type of observ. technique
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constancy of condition
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sys; environmental conditions
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progressive error
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sys/rand: pretest and postest, practice trial mite influence postest; can b wen someone has givin a test prior
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statistical conclusion
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rand: when wrong stat test is used to measure data
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statistical regression
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when participants scores go up after a second test
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testing error
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sys: wen a pretest and postest are specifically effecting eachotehr
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triangulation
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multimethod approach to the study, collecting different data sources from a variety of methodologies
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Type I error
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when you think there is a diff and there isnt one
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Type II error
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when you think there is no diff and there is
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P-value
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probability of making a typeI error
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