# simple effects

1. ### Post-hoc pairwise or simple contrast ANOVA

Hi All, I am examining a dependent variable over 5-time points but what I am really interested in is how the dependent variable differs in comparison to the first time-point (baseline). Firstly, which ANOVA is more appropriate, a repeated measures ANOVA with post-hoc analyses or a simple...
2. ### Simple main effects - alpha correction

Hi, I am hoping someone may be able to help me with this as I have found a lot of contradictory information online. I have a between-subjects 2(group: low vs. high) x 5(condition: c1, c2, c3, c4, c5) design. When running the ANOVA I find a significant group*condition interaction, so I therefore...
3. ### plotting the effect of treatment on plants

Hello, I have some plant data, which contains several plant groups. Within the plant groups there are different plant sizes (devided in groups). For each plant I noted whether it was infected before and after the treatment: data = data.plant > str(data.plant) \$ Group.nr: Factor w/15...
4. ### Question about 3X3 repeated measures ANOVA and simple effects

First time posting here. I have conducted a transcranial magnetic stimulation study and am analyzing the results as a 3x3 repeated measures ANOVA. I'm a grad student in cognitive psychology. 1. purpose of the study: to dissociate language from other forms of cognition using TMS. 2...
5. ### Accounting for other variables when looking for main effects (regression)

I am doing a negative binomial regression, to look for interactions between categorical and continuous predictors. I am currently reporting main effects for both predictors, but am wondering whether I should account for the other predictor when doing so. So, if lang2 & BDCSBI are the...
6. ### Simple effects to understand interaction between repeated variables in mixed ANOVA

Hi there, I am having problems with the statistical analysis for a linguistics paper I am writing. So this study is a mixed ANOVA design with 3 independent variables: Within Subjects Variables: Noun_Type (Count vs Mass) Plural_Morphology (Singular vs Plural) Between Subjects Variable...
7. ### Testing Simple Effects for Generalized Linear Regression

Hello, I have found significant interaction effects when analyzing a negative binomial generalized linear regression model. However, I am not sure how to further explore the interaction. I am currently using SPSS. How can I conduct follow-up simple effects to examine the interactions? Can I...
8. ### Mixed ANOVA withinXbetween interaction not significant, interpret simple effects?

Hi Experts, I have conducted a 2 (time: before, after) x 3 (condition 1 2 3) mixed ANOVA. The within X between interaction is only marginally significant .06. However, simple effects indicate significant change in conditions 1 and 2. The interaction indicates if change over time is a...
9. ### Semipartial correlations for simple slopes

Hello! I'm in need of some help for calculating sr2 for simple slopes. Here is my situation: I'm using SPSS. I have three IVs: x1: dichotomous and coded -1,1 x2: dichotomous and coded -1,1 x3: continuous centered variable I have a 3 way interaction that I've calculated the simple...
10. ### Simple effects for 3-way interaction

Hi, I'm doing a regression analysis with a continuous outcome variable (motivation), 2 continuous predictor variables (income and age), and 1 dichotomous predictor variable (condition). I have determined that there is a significant 3-way interaction, and that in both conditions, there are...
11. ### Simple effects- multiple comparisons adjustments necessary?

Hi guys, I cannot seem to figure out what the correct procedure is for simple effects analysis when decomposing interactions. So I have a significant interaction in a RM ANOVA- I decompose the interaction using simple effects in SPSS (by manipulating the syntax) and I find whats driving the...