control variable

  1. P

    Which non-parametric(?) test? 2 groups, 4 dependent v, 2 control v

    Dear all, I would like to compare two groups (treatment: yes/no) at one point of time (end of the program) on four dependent variables (of which two seem to correlate with each other). Additionally, I have two control variables (which I suppose moderate the effect of treatment). I have roughly...
  2. K

    Categorical Variable Coding Question

    Hi! I have a question on the coding/use of categorical variables: In short, I have two control variables in an SPSS regression model. One is participant (15 levels, or participants) and one other categorical variable (10 levels). And there is just one predictor variable in the model. I've tried...
  3. C

    Controlling for time

    Hello, Thank-you for taking the time to read this post. I have managed to get myself very confused about what is (hopefully) quite a simple problem. I am aiming to look at the engagement on Twitter during election debates. I have collected tweets and have coded them in regards to their...
  4. J

    Input data (data view)

    Hi I have a question about SPSS. This might sound really stupid though. I have to run a regression, but prior to that, I have to check for correlation in SPSS. The correlation is between my independent variables AND my independent variables on my dependent variables. I know where to find...
  5. K

    How to control variables in logistic regression.

    Hello! I have a DV with two outcomes. Several IVs (categorical and continuous). I want to predict the DV using the IVs, but I also have control variables (categorical and continuous) that I need to put in the equation first. I found this code: PROC LOGISTIC < options >; BY variables ...
  6. Q

    Hypothesis Testing Help

    Hello fellow statisticians! it's been awhile since I've done stats and everything has completely escaped me. I'm trying to conduct hypothesis testing for the question below. Everyone has been using the Chi-squared test and I feel that they are wrong. I think it should be a poisson distribution...
  7. M

    analysing cognitive rehabilitation and controlling for spontaneous recovery(SEM)

    Dear all, When trying to figure out the proportion of explained variance of a cognitive rehabilitation program for stroke patients, you have to control for any progress by spontaneous recovery and diaschisis right? So if we measure progress without a cognitive rehabilitation program, you get...
  8. K

    [Lisrel] When including a control variable the solution doesn`t converge

    Hello, I`m testing for the mediating effect and Lisrel works fine when only independent and dependent variables are included. The problem occurs when I include a control variable (TT) in SEM. I encounter the following warning: W_A_R_N_I_N_G: The solution has not converged after 820...
  9. D

    Regression analyses ordering in blocks

    For my regression analyses I have control variables in my regression. 1 of these controle variable is made into a dummy variabele. The dummy variable should be in the same block in SPSS and the control variables should be a block before my independed variables. What would be the correct...