control group

  1. N

    Which statistical test I have to use for pre/post test?

    Dear readers, I am wirting my thesis and I would like to test the effects of an mindfulness Intervention (independent variable) on reducing depressive, anxiety and stress symptoms (3 dependent variables). I have a pre and post-test for this and I would also like to include a control group...
  2. L

    Finding my control group PSM, Matching or regression model and correct for confounder

    Hey there, First off I'm hoping I'm posting this in the right place. I'm doing research where there is a patient group of n=9 that underwent our new treatment. Whilst there is a group of n=140 that underwent the regular treatment. Now my prof. wants me to find the 18 most matching...
  3. G

    Multiple intervention groups for meta-analysis help

    Hi everybody I'm conducting a meta-analysis, and some papers have 2 or 3 intervention groups in addition to the control. I read that I should possibly split the control group equally and examine as separate outcomes. Also, would it be as simple as splitting the control equally, and...
  4. X

    Minimum control size for determining effectiveness of treatment

    So the following scenario I have a treatment that I know to be effective, but I want to determine precisely how effective it in a (large) group of individuals I'm dividing them in to a test group and a control group so I can compare the effect of the treatment However, I want to keep the...
  5. S

    Which test to use? Correlation or Regression

    Hi, I need some help with choosing the statistical analysis. Details of my study. all participants will complete surveys measuring self compassion, whether their psychological needs are met, how high on non attachment scale they are and other trait scales. then, Half will be given some...