All Questions
18 questions
1
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85
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What do you think of this analysis for a small dataset with a weird experimental design?
I have a very small dataset (n<30) that is divided in 3 groups: healthy controls, patients with condition A, and patients with condition B. I am going to do a lipidomics analysis of the samples, so ...
2
votes
0
answers
29
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How to study the impact of time in a mixed-factorial design?
I ran a study to compare 2 different computer interfaces (say A and B) meant to be used in an unfamiliar environment.
I want to compare:
How much effort participants took to complete a certain task ...
1
vote
0
answers
36
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Suggestion Needed about Design Experiment
As a part of my coursework, I'm supposed to be designing an experiment for an online cab service provider to understand the following:
Whether letting the cab driver know the drop location of the ...
- 123
0
votes
0
answers
145
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How to choose the right analysis for a partially nested design?
I am not even sure if it is appropriate to call this scenario a partially nested design, but I settled for it for lack of a better term.
My design is similar to the following in terms of its overall ...
- 165
0
votes
1
answer
143
views
ANOVA or T-test for multiple groups, each group with a set of observations?
Can someone please advise on which sort of experiment or test I should run for the following.
I want to know which messages would potentially resonate more within a population. I have conducted ...
- 3
1
vote
2
answers
983
views
What statistical test is appropriate for a pretest/posttest experimental/control group study?
I thought this would be a relatively straightforward question, but I'm having difficulty finding a decisive answer. Let's say I'm planning to run a study to test the effectiveness of a new type of ...
1
vote
0
answers
23
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Adequate statistical method to compare objective measure vs estimations
I am using a software for image recognition to do the following:
calculate the percentage of a surface that is painted black.
On the other hand, there are several observers that estimate the ...
- 23
3
votes
1
answer
55
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What statistical tests should be performed to test effect of trials on response times where each subject has different number of data-points?
I am running a behavioral experiment where a number of subjects (=20 in my case) perform a simple cognitive task. The experiment consists of a fixed number of trials (say, 40 in my case). During each ...
- 428
1
vote
1
answer
71
views
Which statistical test to use? Not really paired, not entirely unpaired
I am setting up an experiment where I would like to determine whether there exists a difference between the participants' average self reported mental effort in some condition A and condition B.
The ...
- 13
2
votes
2
answers
1k
views
Is ANOVA or ANCOVA more appropriate for an experiment with random assignment?
I understand that in observational studies, if we want to use regression for analysis, and if some variables are supposed to be a confounding variable, we should control for them in the regression ...
- 1,165
0
votes
1
answer
74
views
Comparing means of samples from different populations
I have two equally long time series samples, drawn from two different populations, I would like to test if the means of the two samples are statistically different given population size differences, ...
- 290
1
vote
1
answer
155
views
Arguments/Advantages of Additive Model Construction Analysis in an Experimental Design
Assume I perform a psychological experiment with a number of manipulations, each hypothesized to influence the dependent variable. For instance, we perform a mixed-design short-term memory experiment ...
- 76
1
vote
0
answers
88
views
Same mean, different variance - test?
I have conducted an experiment where I am interested in how well different models for directional hearing works. For each model a sound is presented to a test subject, and the test subject expresses ...
- 11
2
votes
0
answers
66
views
How to correctly analyzed a mixed within-subjects/between-subjects design?
I recently ran a perceptual study in which I aimed to measure how emotion recognition accuracy from whole-body motions changed when two type of body representations were used. Five actors Ai with i=1,....
- 41
1
vote
1
answer
213
views
Which test to use for 2 groups with 2 subgroups each?
I recorded the pumping rate of two types of worm: normal and mutant, with n=6 the number of worms per type.
Then, I exposed these types of worms to a drug. BUT I used a different batch of worms this ...
- 11
0
votes
1
answer
50
views
Fundamental question about applying Anova
I have a fundamental question about applying ANOVA.
Suppose we are testing 4 drugs which reduce blood pressure. Our experiment contains 4 drugs + 1 Placebo. We give these to 3 types of patients (...
- 3
2
votes
1
answer
149
views
Type I ANOVA tests not depending on the order of the factors
I have a dataset with two factors A and B and the following design (contingency table showing the number of individuals for each ...
- 19.7k
0
votes
1
answer
4k
views
Determining if a set of experimental results is statistically significantly different from zero?
We have a dataset resulting from an experiment with a genotype A and a genotype B, which underwent either treatment X or no treatment Y, for four total sample groups. Each sample group had only three ...
- 83