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help > Testing an interaction: split or not & issues with "0" coding
Jun 15, 2020 08:06 PM | Lucas Moro
Testing an interaction: split or not & issues with "0" coding
Dear Alfonso
Dear Conn-Users
Previous posts suggest the following 2nd level contrast [0 0 1 -1] for testing the gender by score interaction, using "males" , "females", "score_for_males", "score_for_females", respectively. However, how do you test the same interaction, by simultaneously correcting for covariates of no interest, such as age or sites? Doesn't it confuse the Conn with categorical or continuous variables when you put "0" for these e.g. [0 0 0 0 0 1 -1]? I also assume here the scores are coded with either a value or a "0". Does it additionally require spliting each covariate into "age_males", "age_females", "site_1_male", "site_1_female", "site_2_male", "site_2_female"?
I screened the posts for this specific question, but could find no answer and would appreciate any comment. Thank you.
Greetings,
Lucas
Dear Conn-Users
Previous posts suggest the following 2nd level contrast [0 0 1 -1] for testing the gender by score interaction, using "males" , "females", "score_for_males", "score_for_females", respectively. However, how do you test the same interaction, by simultaneously correcting for covariates of no interest, such as age or sites? Doesn't it confuse the Conn with categorical or continuous variables when you put "0" for these e.g. [0 0 0 0 0 1 -1]? I also assume here the scores are coded with either a value or a "0". Does it additionally require spliting each covariate into "age_males", "age_females", "site_1_male", "site_1_female", "site_2_male", "site_2_female"?
I screened the posts for this specific question, but could find no answer and would appreciate any comment. Thank you.
Greetings,
Lucas
Threaded View
Title | Author | Date |
---|---|---|
Lucas Moro | Jun 15, 2020 | |
Alfonso Nieto-Castanon | Jun 18, 2020 | |
Lucas Moro | Jul 2, 2020 | |
Alfonso Nieto-Castanon | Jul 6, 2020 | |