Question

What is the main thing that’s wrong with this text from a results section?: As predicted, obsessive thoughts were lower in the group that received CBT (cognitive behavioral therapy) (M =8.00; SD = 2.33) compared to the group that received only medication (M = 14.90; SD = 7.05), Χ² (66) = 3.40, p = .001, d = .64.

		No effect size is reported.
		A t-test should be reported, rather than a Χ2 test.
		A Pearson r value should be reported, rather than a Χ2 test.
		Nothing (there is nothing wrong in this text from a results section).

Answer 1

Here, two means are to be compared

1) Mean for the group that received CBT

2) Mean for the group that received only medication.

The appropriate test for testing equality of two means is t test. However, X2 is reported which is used for testing association or goodness of fit.

Therefore, a t-test should be reported, rather than a Χ2 test.