+ Reply to Thread
Results 1 to 2 of 2

Thread: Spearmans Correlation Doubt

  1. #1
    Points: 58, Level: 1
    Level completed: 16%, Points required for next Level: 42

    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Spearmans Correlation Doubt




    Hello! I have some doubts about Spearmans's Correlation and I would like to ask your help!

    I have 5 variables (3 independent and 2 dependent) and I want to check if each one of the independent is correlated with each one of the dependents.

    Once not all the variables showed normality behaviour (i confirmed this using shapiro test;Q-Q plot and histogram analysis) I did Spearmans instead of Person's.
    Lets call to the independent variables A;B and C
    and to de dependent D;E (My E variable is defined as D/A).
    I did not find correlation between A-D; B-D nor C-D. However I found a correlation statistically significant between B-E and C-E...

    The question is, am I committing any kind of violation with the D/A division to "generate" E? Or can I trust that the result of the test is trustworthy?

    (PS: A;B and C are independent!)

    Thank you so much!

  2. #2
    Fortran must die
    Points: 58,790, Level: 100
    Level completed: 0%, Points required for next Level: 0
    noetsi's Avatar
    Posts
    6,532
    Thanks
    692
    Thanked 915 Times in 874 Posts

    Re: Spearmans Correlation Doubt


    I was not aware that Spearman assumed a variable was independent or dependent unlike say regression. If your dependent variable is defined in part by one of your independent variables (which E is) then you have forced it to be related to the IV. That can cause a problem with the calculation of parameters in regression, but I don't know if this is true of spearman's.

    What is the form of your variables (interval, ordinal, or binary)? This has significant impact on your results. If any of the variables are binary (say yes no) then spearman's is not ideal.
    "Very few theories have been abandoned because they were found to be invalid on the basis of empirical evidence...." Spanos, 1995

+ Reply to Thread

           




Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats