I am doing a study analyzing trends in changing bird diversity over the past 40 years. Surveys have been taken at 20 locations each year. The survey locations are the random effect and repeated each year. This is the code and output I used in the lme4 library...
This is my first experience with repeated measures ANOVA and mixed linear models. Since I did not found an example that uses a design similar to my experiment, I hope I can get some help. I collected 3 soil samples (SAMPLE_ID) in 4 areas (SITE), totaling 12 samples. My objective is to...
We assessed several psychological measures (e.g. self-compassion scale, five-facets mindfulness questionnaire, satisfaction with life scale) before and after a Mindfulness-Based Psychoeducational Program for groups of people with acquired brain injuries. We would like to...
Good day. I have a question regarding the formula for calculating interaction effects. In Andy Field book he gives: SSa×b = SSmodel − SSa − SSb, where a and b are the different factors in our model.
What happens when we have 3 or more factors? Is this then: SSa×b×c = SSmodel - SSa - SSb - SSc...
I would like to compare the effect of different independent variables on a dependent variable.
My VD is quantitative.
I have 3 VI that are nominal: Valence (2 levels), Rhetorical orientation (2 levels), statement type (3 levels).
It looks like that:
In order to asses the influence of...
I have some troubles choosing the right test to my data.
I have 7 groups in total with N=8 samples each.
Group 1: control
Group 2: Variable 1 = A, Variable 2 = 1
Group 3: Variable 1 = A, Variable 2 = 2
Group 4: Variable 1 = A, Variable 2 = 3
Group 5: Variable 1 = B, Variable 2 =1...
I did a linear mixed model full factorial with 2x2. I use the linear mixed model like an ANOVA and I have one significant main effect and a significant interaction effect.To solve the interaction I split my data by one variable and analyze the main effect by the other variable...
I've been trying to manually calculate the sum of squares for 2 independent variables in an ANOVA table and can only seem to work out two total sum of squares exaplianed by the two independent vairables.
Is there any way that I can work out how many sum of squares is attributed to each...
This is about my PhD thesis where I am trying to see the pattern of memory deficit among different types of hypothyroidism. I have used a between subject group design with 1 IV with four levels. Thus, I have 4 four groups which are:
Subclinical Hypothyroid group N= 14
I am having difficulty understanding how to interpret effect size f(V) on GPower for a priori sample size calculation for ANOVA repeated-measures, within-between interaction. I am conducting an a priori power analysis to calculate sample size for ANOVA repeated measures, within-between...
I have sets of data in CFU/ml for different sampling sites collected in two different seasons.
1. How do I compare the CFU/ml between sampling sites within one season?
2. How do I compare the CFU/ml in different seasons of the same sampling site?
Suppose I want to compare algorithm runtime performance (measured in seconds) of different algorithms for the same problem type. There are several problem instances for this problem type on which the algorithms are tested and performance is measured.
As far as I...
Anova question... I know anova is typically used on three groups who take one test, for example, but can you use it on one group who takes three tests (to compare the means on the three different tests, when all participants took all three tests)?
It's about a social psychology study. People assigned to 2 portions [ R (Right) L (Left)] in 3 spaces (88,29,25) that each one have 3 configurations (1,2,3) R and L are quantitites of person that follows the instructions while n_R and n_L are quantities of persons in each sample that do not...
I am comparing individual's answers to 10 questions where they must put a low range and a high range. After answering these questions individually, they answer the same questions but in a group. I am hypothesizing that a measure they took on their individual goal orientation level will...
I have a data set with two groups of participants - Group_A (anxious, not depressed) & Group_B (depressed, not anxious), out of which half of the participants in each group completed task in one of the two conditions (Training_1 & Training_2) at three different times (before, after and 1month...
Hi everyone... I'm new to Bayesian statistics and I'm trying to perform a BANOVA. I'm using the following book to help me: "Doing Bayesian Data Analysis A Tutorial Introduction with R and BUGS", written by John K. Kruschke.
I'm working on a simulated data set, trying to find a difference in...
Apologies if this is a basic question, but my stats is very rusty these days!
Background: I'm looking at a procedure that automates FISH analysis in a genetics diagnostics laboratory. I am currently running 7 patients that are negative controls (known normal patients) on the automated system to...
I have sleep data where there are 5 groups of people, 4 medications, and 5 different days measured. I ran an aov on in R Studio, but the table came back looking like this:
What I don't understand is...