Why CFA and not EFA?

QuantFish instructor and statistical consultant Dr. Christian Geiser explains why you should typically use confirmatory rather than exploratory factor analysis.
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[@Yanice-yh4xi]

Dear Dr. Geiser, thank you so much for the informative video. recently, i am trying to validate a scale. However, i encoutered some issues. For example, previous studies found inconsistent results with regards of the structure. some studies suggested it is a unidimentional, while other studies suggested it is two-factor structure. i am not sure in this case, shall i use EFA or CFA first. Thank you again!

[@QuantFish]

I would run a 1-factor and a 2-factor CFA model.
Best, Christian Geiser