I have an experiment to look at habitat preferences of beetles and the effect of competition.
In the first test, a beetle is on his own in an arena and I measured the % of time he spends in each of THREE types of habitat (open, bush and underground). I repeat this experiment with several...
I need to compare the performance of two groups of subjects undergoing two different treatments over time.
I have used a two-way repeated measures mixed ANOVA (SPSS) with
- Group (treatment A vs B) as between factor
- Time (pre treatment, 1 month after treatment, 2 month after treatment) as...
I just finished conducting a repeated measures anova looking at mean sand grain sizes over time over a 13 year period for seven sites. Each year a sand sample was collected from a different section of the beach for each site: Ex: Sand samples are collected from the foreshore, midshore...
I Iaunched a survey recently where I have the following types of questions -
1) A multiple choice question (where users can mark more than one correct answer), let's call it variable a.
2) A single choice answer type question (radio button type), let's call it categorical variable b.
I was wondering if anyone could give me some pointers about how to analyze my thesis experiment.
We had 12 participants, each performed something called "Random dot motion" cognitive tests with coffee
and decaffinated coffee (randomly counterbalanced) on two separate days.
In my science class, we had to record the amount of time it took for an ant to escape 4 different colored mazes to see if color had an impact on escape time. In determining the statistical significance of the differences in escape time for the different colors, would a one-way ANOVA be...
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)?