How to calculate Cronbach's alpha of IAT ?


How to calculate Cronbach's alpha of IAT ?

Author
Message
LIN
LIN
Respected Member
Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)

Group: Forum Members
Posts: 2, Visits: 10
Hi !

I am confused with how to calculate Cronbach's alpha of IAT ,
and I think that the calculation of Cronbach's alpha of IAT and ST-IAT will be the same ,right?

 It will be kind of you if you can tell me how to resolve this problem.

Thank you very much!



Dave
Dave
Supreme Being
Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)Supreme Being (753K reputation)

Group: Administrators
Posts: 9.9K, Visits: 49K
LIN - Sunday, December 25, 2016
Hi !

I am confused with how to calculate Cronbach's alpha of IAT ,
and I think that the calculation of Cronbach's alpha of IAT and ST-IAT will be the same ,right?

 It will be kind of you if you can tell me how to resolve this problem.

Thank you very much!



If you want to calculate Cronbach's alpha, you essentially
- compute difference scores for every single trial of the combined blocks,
- treat those as separate items, and
- calculate alpha over that.

I'll note that the more common (and easier) approach to assess IAT reliability is some variation of split-half reliability, e.g. calculation the correlation between the D-score for the 1st combined blocks (da) and the D-score for the 2nd combined blocks (db). https://faculty.washington.edu/agg/pdf/Schnabel%20&%20al.Hbk_2008.proofs.pdf gives a short overview of the various approaches.

LIN
LIN
Respected Member
Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)Respected Member (379 reputation)

Group: Forum Members
Posts: 2, Visits: 10
Dave - Monday, December 26, 2016
LIN - Sunday, December 25, 2016
Hi !

I am confused with how to calculate Cronbach's alpha of IAT ,
and I think that the calculation of Cronbach's alpha of IAT and ST-IAT will be the same ,right?

 It will be kind of you if you can tell me how to resolve this problem.

Thank you very much!



If you want to calculate Cronbach's alpha, you essentially
- compute difference scores for every single trial of the combined blocks,
- treat those as separate items, and
- calculate alpha over that.

I'll note that the more common (and easier) approach to assess IAT reliability is some variation of split-half reliability, e.g. calculation the correlation between the D-score for the 1st combined blocks (da) and the D-score for the 2nd combined blocks (db). https://faculty.washington.edu/agg/pdf/Schnabel%20&%20al.Hbk_2008.proofs.pdf gives a short overview of the various approaches.

Dear DAVE 
Thank you for your response,
it's really a great help to me!

GO


Reading This Topic


Login
Existing Account
Email Address:


Password:


Social Logins

Select a Forum....






Millisecond Forums


Search