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  1. Junes

    Prior concentration in Bayesian contingency tables

    Hi all! I'm working on a simple project for the uni where I work. I'm trying to find out if teachers grade students differently. I'm looking at an assignment that can only be passed or failed. I thought this might make a nice project to delve into Bayesian statistics. So I found this very...
  2. Junes

    Power analysis for cross-classified model

    Hi there, Any help would be greatly appreciated! We have done a study in which a sample of respondents rated a sample of online profiles on their trustworthiness. There were a total of 189 respondents and 259 profiles. So, each profile was rated on average 7.3 times. We are using a...
  3. Junes

    Within-subject factor or different DVs?

    Hi all, Something I came across when helping a colleague out. I can conceptualize one 'grouping' of his data as a within-subject factor or as different dependent variables. He's looking at the attributes of brands (functional/traits/values) and, in a survey, asks for the importance of each in a...
  4. Junes

    please help me make sense of my multilevel linear regression [R]

    Hi everyone, I'm trying to wrap my head around multilevel (or mixed-effect) models, but not quite succeeding. I have the following data from a pilot study: 221 ratings (mean of several items on 1-5 Likert scale) for trustworthiness from 13 people on 17 internet profiles (fully crossed). I'm...
  5. Junes

    Power calculation with measurement error on Y

    I'm trying to do a power calculation for a study I'm involved in, and I'm a bit stuck. The study is about textual cues of trust. We want to analyze a number of predictors in the text using the LIWC tool (which generates features based on text) and correlate them with perceived trust as...
  6. Junes

    Many predictors relative to cases, want to identify interesting ones

    I've been helping a colleague with his research project. He is looking at the trustworthiness of profile texts. He is analyzing text entries using the LIWC tool, which generates around 90 dimensions based on text input (positive/negative affect, pronoun use, etc.). Most of it on the ratio or...
  7. Junes

    how to determine qualitative dispersion over time with differing sample sizes

    I've been working on a study with workers at a certain plant, to test their safety awareness. During a meeting, everyone is asked to select a card that represents the risk that they feel is most prominent for a certain task. There are 15 different cards Our hypothesis is that over time...
  8. Junes

    Confused about causality

    I'm helping a colleague of mine with his homework for his political science master. He's investigating the effect of political orientation on support for military missions. He has a big database with survey data. Political orientation (left-right) is measured on a 10-point scale, support for...
  9. Junes

    Comparing museum visitors numbers using non-parametric method

    Hi all, I'm supervising a student who is going to do her research on visitor numbers to a certain exhibition. The museum will be actively promoting this exhibition in the month to come. The museum wants to know whether this marketing campaign had an effect on visitor numbers. So, we...