Michael Tsikerdekis

12 Questions 46 Answers 0 Followers

Questions related from Michael Tsikerdekis

Does my affordance identification framework make sense?

I am experimenting with finding a way to trace behaviors back to design features for a game and I figured affordances may be the way to go. The goal is through participant observation and...

10 October 2015 6,352 3 View

When does using binary variables converted from numeric in linear regression make sense?

I have a numeric output variable and a numeric predictor in a small sample size. For example, my output variable is percentage of domestic abuse per each state and my predictor is the percentage...

02 February 2015 773 12 View

Combining probabilities from two models (Bayesian approach?)

I have two models with the same binary dependent variable but different independent variables. I haven't used all IV in one model because: a) for the second set of IVs there are missing data for...

12 December 2013 6,248 13 View

Linear regression with compositional data: need example on dealing with this

I have a dataset consisting of proportion variables as independent variables. I need to run a linear regression however there is the issue of multicollinearity. I've read that using a centered log...

03 March 2013 1,557 8 View

How can I compare the number of sentences and words between two languages while controlling for natural language variation?

I have a set of paired texts in English and Spanish. I used the punkt tokenizer with pre-trained packages that can be found in the NLTK package for python. It works effectively however I want to...

03 March 2013 1,501 18 View

Controlling for multiple dichotomous variables and calculating effect size

I am having the following data (as an example). I am interested in measuring the difference in sentences between several texts in English and in Spanish. I can do that either with Mann-Whitney U...

02 February 2013 3,060 5 View

How to deal with percentage metric and "missing" data.

I have a metric that produces a percentage of the total number of registered users over the total number of all users. Question is that for a third of cases in my dataset, the total users are zero...

02 February 2013 1,139 25 View

Any good books about designing social media?

I am looking for books for software engineers and hci researchers focused on social media that will have enough scientific depth to be included as lectures for a course on social media. Any ideas?

03 March 2012 2,343 9 View

Two sample Bayesian hypothesis testing for nonparametrics

Hi everyone, I want to test for differences between two independent samples using bayesian hypothesis testing.(the equivalent test here would be a Mann-Whitney U test). Since i am no statistician...

03 March 2012 4,623 12 View

Equivalence & noninferiority testing in social science?

I would like to hear your thoughts on the topic. You see most of the text books tend to argue that the null hypothesis can never be proven because of falsifiability etc. So i have several...

02 February 2012 9,860 5 View

Which comparative analysis to use for rank ordered data?

I have two separate groups which are asked under different conditions to sort a list of items in terms of preference(building a hierarchy). The total number of items is 5 and the data is...

02 February 2012 10,001 43 View

Opportunity sampling, snowball sampling and random sampling over the Net. Ways to gather a decent sample and publication options?

I conducted two surveys through a Facebook application. One of the topics were anonymity and aggression. The methods that i followed were a mixture of Opportunity sampling (post in fan pages and...

09 September 2011 3,448 4 View