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20 Cards in this Set

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