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What is the null for t-tests in JASP?

When I perform a directional t-test in JASP (A > B) is the null then no difference (A = B) or its complement (A <= B)? I know that in correlations in JASP it is compared to the 'no difference' hypothesis, so assume it is the same for t-tests, but wanted to make sure before I write it up.

Comments

  • Terribly sorry for the 'B )' that turned into the cool shades emoticon. This should be the text:

    When I perform a directional t-test in JASP ( A > B ) is the null then no difference ( A = B ) or its complement ( A <= B )? I know that in correlations in JASP it is compared to the 'no difference' hypothesis, so assume it is the same for t-tests, but wanted to make sure before I write it up.

  • EJEJ Posts: 392

    Hi Kevin. The null is always the absence of an effect (i.e., a point null). In one of the next blog posts on BayesianSpectacles.org, I will explain how you can obtain the test for direction from two directed tests against the point null.
    EJ

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