RM anova or Factorial Anova?
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I have an intervention in a group of schools. I think I need to use RM anova since RM Anova is 1 factor between subjects and other one within subjects (time) while factorial anova is two factors between subjects -is it correct? I have 4 subscales and I have pre and post scores. I want to see if the intervention was effective or not. Also one other question my control group is much smaller than my intervention group due to availability. Thanks for your advice.
anova
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joanmillerjoanmiller
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I have an intervention in a group of schools. I think I need to use RM anova since RM Anova is 1 factor between subjects and other one within subjects (time) while factorial anova is two factors between subjects -is it correct? I have 4 subscales and I have pre and post scores. I want to see if the intervention was effective or not. Also one other question my control group is much smaller than my intervention group due to availability. Thanks for your advice.
anova
asked 1 hour ago
joanmillerjoanmiller
61
New contributor
joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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add a comment |
$begingroup$
I have an intervention in a group of schools. I think I need to use RM anova since RM Anova is 1 factor between subjects and other one within subjects (time) while factorial anova is two factors between subjects -is it correct? I have 4 subscales and I have pre and post scores. I want to see if the intervention was effective or not. Also one other question my control group is much smaller than my intervention group due to availability. Thanks for your advice.
anova
asked 1 hour ago
joanmillerjoanmiller
61
New contributor
joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I have an intervention in a group of schools. I think I need to use RM anova since RM Anova is 1 factor between subjects and other one within subjects (time) while factorial anova is two factors between subjects -is it correct? I have 4 subscales and I have pre and post scores. I want to see if the intervention was effective or not. Also one other question my control group is much smaller than my intervention group due to availability. Thanks for your advice.
anova
anova
asked 1 hour ago
joanmillerjoanmiller
61
New contributor
joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
joanmillerjoanmiller
61
New contributor
joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
joanmillerjoanmiller
61
New contributor
joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
joanmillerjoanmiller
61
asked 1 hour ago
joanmillerjoanmiller
61
61
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joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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joanmiller is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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1 Answer
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You certainly need to account for the dependence of the data, so regular ANOVA is not an option. However, RM-ANOVA makes assumptions that are rarely met in repeated measures - in particular, it assumes sphericity.
It would probably be better to use a multilevel model. These make fewer assumptions.
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
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1 Answer
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1 Answer
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active
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$begingroup$
You certainly need to account for the dependence of the data, so regular ANOVA is not an option. However, RM-ANOVA makes assumptions that are rarely met in repeated measures - in particular, it assumes sphericity.
It would probably be better to use a multilevel model. These make fewer assumptions.
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
$endgroup$
add a comment |
$begingroup$
You certainly need to account for the dependence of the data, so regular ANOVA is not an option. However, RM-ANOVA makes assumptions that are rarely met in repeated measures - in particular, it assumes sphericity.
It would probably be better to use a multilevel model. These make fewer assumptions.
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
$endgroup$
add a comment |
$begingroup$
You certainly need to account for the dependence of the data, so regular ANOVA is not an option. However, RM-ANOVA makes assumptions that are rarely met in repeated measures - in particular, it assumes sphericity.
It would probably be better to use a multilevel model. These make fewer assumptions.
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
$endgroup$
You certainly need to account for the dependence of the data, so regular ANOVA is not an option. However, RM-ANOVA makes assumptions that are rarely met in repeated measures - in particular, it assumes sphericity.
It would probably be better to use a multilevel model. These make fewer assumptions.
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
answered 25 mins ago
Peter Flom♦Peter Flom
77.8k12110219
77.8k12110219
add a comment |
add a comment |
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