R Tutorial: Test-retest reliability (using intraclass correlation)

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  1. Statistics Guides with Prof Paul Christiansen
  2. Bland Altman plot
  3. Bland-Altman plot
  4. ICC
  5. Rstats
  6. Test-retest reliability
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Комментарии
Автор

Hi, thanks for the video.

May I ask what the difference between psych::testRetest and psych::ICC is? I understand for psych::testRetest, it actually takes all items and compares them between the first and second time point. From what I see in psych::ICC, it seems to be taking 1 value only. Is the 1 value a total score?

adoi
Автор

Nice video! Short and sweet. Does this also test the strength of association (effect size) between a continuous and nominal (categorical) variable?

brazilfootball
Автор

hello, thank you for the explannation. Can i conduct the ICC with the by function. For example, seeing whether the ICC differs between 2 groups. Can you please provide the syntax for that?. Thanks again.

hebametwalli
Автор

can we do the same with 3 time points? ty

jorgemmmmteixeira