correction

  1. S

    Reporting corrected correlations

    Hi All, I need to report a large set of correlations whose p values I have already corrected for multiple comparisons using R. I assume that the correlation coefficient will remain the same, as nothing in the r formula has anything to do with how the p value is calculated. 1) Is that correct...
  2. T

    Simple main effects - alpha correction

    Hi, I am hoping someone may be able to help me with this as I have found a lot of contradictory information online. I have a between-subjects 2(group: low vs. high) x 5(condition: c1, c2, c3, c4, c5) design. When running the ANOVA I find a significant group*condition interaction, so I therefore...
  3. 5

    What's the correct correction factor? Multiple one-sample and paired tests...

    This question concerns the chance of Type I error in hypothesis testing with multiple statistical tests. The data come from a series of experiments. To make it easier to describe clearly, we could consider the experiment as having 3 parameters that could be varied. We could call these A, B...
  4. L

    Unbiased estimate of cross-product for unbiased vector

    Let g be an unbiased estimate of a vector G. Can g be used to find an unbiased estimate of the cross product GG′ (where G' is the transpose of G)? I'm stuck because naively using gg′ is a biased estimator, with the (upwards) bias depending on the noise in g.
  5. psychologies

    SPSS - Bivariate/multiple correlations: How to run a Bonferroni correction?

    Hello, I am new to the forum and have a question regarding running Bonferroni corrections with bibariate correlations within SPSS. To give a brief background to the project: I am developing a psychometric scale and in order to assess convergent validity, have obtained data from N=100+...