and then she says to me "kill me now kill me now kill me now"
Help!
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| systematic source of variability/systematic variance | show 🗑
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| show | error variance; due to chance factors which are typically out of our control and which have not been varied systematically across participants in the study.
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| t-test | show 🗑
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| ANOVA/analysis of variance | show 🗑
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| within group variation | show 🗑
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| show | why means differ across groups
condition effects + experimental error
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| show | between group variation / within group variation
= 1 if no condition effects
> 1 if condition effects
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| show | rejecting the null hypothesis where it should have been accepted
defined by α-level
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| show | the probability level on which the decision to accept the null hypothesis is based (usually p > 0.05)
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| show | family of indices giving us information about the strength of effect(s)
allows:
assessment of treatment magnitude (IV on DV)
comparison of effects with other studies
aggregation of results for meta analysis
estimation of required sample size
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| show | η² = SSeffect/SStotal
proportion of total DV variance attributed to an effect
closer to 1 = larger effect
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| show | ηp² = SSeffect/(SSeffect + SSerror)
less biased than η² (takes less of design into account)
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| ω2 | show 🗑
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| ωp2 | show 🗑
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