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I am contacting with an issue regarding running reliability tests for my dataset.
It seems that for three of my scales, the reliabilities are very low (i.e., less than .6). I haven't been able to find the reason for why the reliabilities are low (I've already checked the recoding and everything was done correctly). For one scale in particular, the TRIM-18, has an alpha of .637 (after recoding), but .91 (TRIM-18 Original; before recoding). I'm not sure what had gone awry to cause the alpha to change.
The last scale, which contains dichotomous choices (i.e., true or false), also has very low reliability. I understand that the Kuder-Richardson formula is needed to measure reliability for dichotomous choices, but was told that the way to calculate the reliability is the same as calculating for Cronbach's alpha. Can you please confirm if this is correct?
To conclude, I'm just confused as to why these scales have such low reliabiltities. I have attached the SPSS output file to this email of the three scales I am writing about.
I am not sure if this is the correct email to contact, but if it is not, then I would appreciate it if you could kindly redirect me to someone who can provide help for this issue.
Thank you for any help you can provide.