interaction effect

  1. Z

    Interpreting "Within-subjects contrasts" in Mixed ANOVA

    Greeting stats peers, After conducting a 2x2x(3) Mixed Model ANOVA, I am struggling to understand the SPSS output "Within subjects contrast" Specifically, - Factor B" (e.g., a sex-prime) exerted no main or interaction effect; - yet there was a significant AxBxC linear interaction in...
  2. M

    Interaction effect in a logistic regression between cont and cat variables.

    Hi guys, I am conducting a logistic regression on whether a participants test positive or not to HIV (1=positive; 0 Negative) in a sample of transgender people. I have two independent variables Sw sex workers (yes or not) and number of sex partners (NsexP). When I run the logistic...
  3. J

    Best regression using ANOVA technique: trend comparisons in a 3x5 factorial

    Hello all: I need help using the ANOVA technique to arrive at an appropriate form of a multiple regression equation between the response (disease severity) and the two factors tested (spring rate) and (summer rate) in an field study. The experimental design is a 3 x 5 factorial arranged as a...
  4. G

    repeated measures anova, post hoc testing

    Hi there, I have a 2x4 fully repeated measures design in which participants had to correctly state whether a target was absent or present in a visual field task, with different numbers of distractors. the first independent variable is target presence/absence the second independent variable...
  5. J

    graphing an interaction in Stata

    Hello, I am trying to find the correct way to graph an interaction effect between two continuous variables in Stata. My regression, the code is nestreg: regress y (c1 c2) (x1 x2) (x1_x_x2) with y the outcome variable, c1 and 2 controls, x1 and 2 the independent variables, and x1_x_x2 a...
  6. R

    Follow up 3 way interaction effect using SPSS syntax ?

    Hello everybody :) I have a significant 3 way interaction effect. For a 2 way interaction effect, I am aware of using the following syntax code for simple effect analyses and then conducting pairwise comparisons. /EMMEANS=TABLES(A*B) COMPARE(A) ADJ(BONFERRONI/SIDAK) /EMMEANS=TABLES(A*B)...
  7. L

    interaction help...

    i have an nominal IV with four levels, an ordinal IV and ordinal DVs. I want to test for an interaction effect in which high levels of the ordinal IV produce high levels of the DV in just one of the nominal IV levels. I have only learnt how to create an interaction term for SPSS GLM for...
  8. A

    Help needed! Main effect and interaction question

    I have a MINITAB printout I was hoping someone could help me with. My question is- from the table below how do i distinguish between a main effect and an interaction? Q. Three drug treatments are compared at three sites. The treatments consist of two dosages (low and high dose) of an...
  9. A

    MANOVA Sig. Interaction but no Sig. simple main effects - How to proceed?

    Hi All, I'm running a study on delay discounting. My predictor variables are induction condition (stress vs. relaxation) and reward responsiveness (high vs. low). The dependent variables were proportion of immediate choices on two laboratory measures of discounting. I ran a MANOVA and got...
  10. S

    interaction in logistic regression

    Hi, I have run a moltinomial logistic regression and wanted to test for moderation effects of some variables so I tested the model with main effects only against a model where interaction effects where added. Is not normal that the likelihood ratio test table does not show significance for the...
  11. W

    Plotters for interactions in logistic regressions

    Hey there! Are there any excel spreadsheet-type plotters that will work for moderated logistic regressions? I'm finding some online, but they are for continuous dependent variables, not logistic regressions. Any help would be appreciated Best, Paul
  12. A

    Phonetics: Interactions without one of the main effects

    I am using a logistic regression model with bias reduction in order to predict the contrast between /b/ and /p/ in Ojibwe based on acoustic correlates (ConsDur, Sonority etc...). I am trying to arrive at the best fitted model according to the AIC. In R I can construct a model with an...
  13. T

    Interpreting Interaction Effects

    I have ran interaction effects in Binomial logistic regression. I know how to interpret the interaction effect but I am having trouble interpreting the other variables in the model that makes up the interaction effect. Are the other variables held at 0 in the interpretation or are they held at...
  14. S

    Interpreting Interactions in Binary Logistic Regression

    Hi! I was wondering if anyone knows how to interpret interactions in SPSS, for logistic regressions, or how a good source that might outline this. The interaction is between country level of development (0/1) and years in education (1-26). The interaction effect is significant, but the main...