experiment analysis

  1. S

    Counterbalanced caffine within subject repeated experiment

    Dear all, 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. This test...
  2. J

    2 Way ANOVA or multiple t tests with correction?

    Hi all, I am trying to do some data analysis, and I'm not sure whether to use a 2 way ANOVA or multiple t tests with Bonferroni correction. I am looking at the effect of a chemical on bacterial binding to different polymers. So for each polymer, I want to know if there is a difference in...
  3. M

    eQualityCoin- What type of model is this?

    Hi everyone, I've been working on developing a crypto-currency called eQualityCoin for a while now and hoped someone here might be able to help me "classify" the system in a formal mathematical sense. The system's main feature is a simple rule for how it determines a purchaser's exchange...
  4. M

    Dealing with a strong ordering effect

    Hello, I'm conducting a study in which people have to judge a perceptual effect (by rating it on a 10 point continous scale). I have three levels of this effect and there are two different contexts. There was a first study in which the order of the effects was randomized, but not the...
  5. S

    Experimental Design Assignment

    I have an assignment that I can't solve in/with R I don't give the whole problem statement, but only the details that are of concern The objective of the study is to assess the ecacy of X (as compared to the reference treatment with SCALA). In this study 24 hills with grapevines are at...
  6. R

    PLEASE HELP...Response Model

    I am really struggling with this question...sorry but two of the equations did not copy over so I have attached the full version. You have conducted an experiment on a system with four process variables. Two of these factors are easy to control in the full-scale process (x1 and x2), and two...
  7. G

    Conceptual Question: Experiment where you analyze different skew between conditions.

    Hi all, I had a psychology stats exam yesterday and one question was: 'Present a hypothetical experimental question in which the main interest is the difference in the skew of the dependent variable for different experimental conditions.' I understand this to mean that you have two or...
  8. D

    Experiment design and analysis for e-commerce

    Hi i'm new to the forum and hopefully somebody wants to offer me a bit of advice. I'm carrying out a marketing choice experiment to estimate the effect sizes of copywriting new texts for our webshop. So to set up the experiement, i've made a webshop mockup with 4 similar products, one of...
  9. C

    Stats Analysis Question =]

    Hey Everyone, Question!: In an aged-matched experiment, I want to compare . . . . I want to test the significance of DrugY on performance of Task1 for EACH child: (In this case each child is acting as their own control) Classic Autism DrugY Child A VS. Classic Autism Placebo Child A...
  10. B

    How to test for differences in binary score data

    I have data from a human subject study that was setup as a 3x2 (system by task type) experiment, with 24 participants. Each participant completed 6 tasks in all, one using each of the 3 systems, and 2 task types. I have two performance measures: the first is completion time, and the second is a...
  11. H

    Working with group totals...

    Hi, I was wondering does anyone have any thoughts on this. I have recently conducted experiments looking at creative problem solving. I had 30 participants, in groups of 5 assigned to one of three conditions. I was looking at where whether brainstorming aloud or in silence was most...