alternative specific design - test design (high std errors)

Hey,

I just tested my alt-spec design (legit efficiency) and unfortunately I got those high standard errors. my sample size will be around 300. even if I double it to 600 the standard errors won't be low enough. when I also check more interaction effects, the std error is up to 10. what are my options now?

  • I chose balanced overlap as method (tried shortcut but same std errors)

  • I have three conditions within my concept

  • 12 tasks per versions, 2 concepts per task plus NONE, 300 version counts

Thank you so much in advance!

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