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  1. C

    Cronbach's Alpha for a new test. tested w control (n=15) and clinical group (n=15), should I run it on whole sample (n=30)or separately on each group?

    We have developed a novel test of theory of mind which we administered to a group of controls (n=15) and a group of individuals with motor neurone disease (MND) (n=15). The group with MND performed significantly poorer on our novel test of theory of mind compared to the controls (with a large...
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    Normality testing when comparing between groups using independent t test/ mann whitney U

    Hi there, I'm hoping someone may be able to clarify: I have two independent groups one patient group and one control group and I am wanting to compare their scores on the Beck Depression Inventory (BDI) When doing normality testing to check whether to use a parametric t test or non...
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    To run correlation within or between my groups? Help thank you!

    Hi there- I have two independent groups a patient and control group who both completed an executive function test and a social cognition test. I want to look at whether executive function correlated with social cognition. Should I be running my correlation on the whole sample? or two...