95% Bootstrap Confidence Interval PreviousNext
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 Estee posted on Wednesday, October 16, 2013 - 12:22 pm
Hi,

I tested a mediation model. The indirect effect was bootstrapped. The 95% confidence limit was [.000, .038]. According to literature, an indirect effect is considered sig. if the CI does not include/cross zero. Is the .000 showed in the results really equal to zero or it may be for example.0001 ? so, how to confirm whether the 95% confidence limit [.000, .038] is sig or not?

Thanks very much.
 Linda K. Muthen posted on Wednesday, October 16, 2013 - 9:57 pm
I would count that as non significant even if the value was .0001. With so many tests being performed, I would be conservative.
 Joao Garcez posted on Friday, March 13, 2015 - 3:27 pm
Hi,

I was wondering something similar. I have a non-significant indirect effect (b = -.019, p>.05) with the following bc bootstrap 95% CI: ( -.047 - .002 ).

Is a value of .002 considered to be equal to zero?

Also, when values in the lower and upper bound have opposite signs like the one above, does it mean something? The path above is negative with a positive value in the CI. Does it mean is non-significant?

Thank you very much.
 Bengt O. Muthen posted on Friday, March 13, 2015 - 5:22 pm
If the CI covers zero, the coefficient is deemed insignificant. Your lower limit is negative and your upper limit positive, so your coefficient is non-significant.
 Joao Garcez posted on Tuesday, March 17, 2015 - 7:34 am
Thank you for the clarification.

Best,
JA
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