psychology

  1. K

    Two Stats problems that are confusing me

    Prove that http://imageshack.us/photo/my-images/708/question1c.jpg/ AND Rewrite http://imageshack.us/photo/my-images/221/question2.jpg/ Any help would be appreciated, please & thank you!
  2. A

    Replacing missing data with EM

    Hello everyone, For my undergraduate dissertation in Psychology I have conducted research testing the executive function (EF) skills of 40 children, gaining five EF scores. Several children did not complete all the tests, so I have some missing data (13.75% of values). I have been browsing...
  3. P

    Paired t test or repeated anova

    I have a two groups design (treatment vs control) and pre and post test. I've looked at a paired t-test to see if there was a difference, and found diferences between pre and post test in the experimental group and not in the control. However, if I do a repeated-measures ANOVA there's no...
  4. A

    test whether 2 mean scores are significantly different

    I have two groups of participants; 1 group received treatment A and the other group received treatment B. I have the mean scores of the effectiveness for both groups. Group A mean score before treatment was 35 and after treament 20 Group B mean score before treatment was 25 and after...
  5. L

    SPSS Ancova in GLM to include intercept or not

    Stats novice here. I am conducting an ANCOVA in spss for behavioral research. Research Q: Does the presence of a biological marker predict cognitive functioning after controlling for covariates (age, educ, etc). My results are lovely when i don't include the intercept in the model...
  6. A

    Please identify the statistical test I should use.

    I'm trying to predict whether personality is an indicator for crime victimisation. I have used the five factor model (FFM) to collect average scores for personalities of neuroticms, agreeablenes... etc and i have data on particpants which indicates the crimes they have been victim to... assault...
  7. M

    personality psych)self-selected sample bias = smaller variability?

    Context: online personality survey (BFI) for age 10~65 (http://www.colby.edu/psychology/labs/personality/publications/Soto_et_al_2011.pdf) Measure taken: the authors tried to control for possible self-selection bias in the sample by "by examining the variability of Big Five domains and facets in...