This post is on causal inference. Errors in causal inference in the social and behavioural sciences are prevalent both in the scientific literature and in the media. This post (a) suggests articles on causality to read, particularly for researchers in psychology; (b) discusses and critiques material on the Internet on causality; and (c) provides further links to material on causality.

## Friday, October 30, 2009

## Thursday, October 29, 2009

### Tips for Using StatET and Eclipse for Data Analysis in R

My favourite editor for conducting analysis in R is the StatET plug-in for Eclipse. This post discusses an assortment of tips and tricks that I've discovered to make this editing environment even better.

## Monday, October 26, 2009

### Scale Construction | Item Reversal, Scale Scores, Reliability, and Metadata

This post discusses how to: (a) use exploratory factor analysis output to determine items to retain on a test; (b) run syntax that reverses items and produces scale scores for a test; (c) calculate reliabilities for scales using retained items. Various tips are provided to make the process more efficient and less error-prone. The example uses SPSS, but many of the ideas would generalise to other statistics packages.

### Exploratory Factor Analysis and Scale Construction | R, SPSS, and General Resources

In this post I provide links to resources on exploratory factor analysis and scale construction. Links are provided for conducting exploratory factor analysis in R and in SPSS. Links to academic articles on the topic of exploratory factor analysis and scale construction with an emphasis on psychological applications are provided.

### Depth Interviews | Applications, Thoughts, Resources

This post discusses depth interviews. The post: (a) provides a range of applications where interviews may be useful; (b) makes a few observations from my experience; (c) lists additional resources for the interested reader.

By
Jeromy Anglim
on
Monday, October 26, 2009
Labels:
interviews,
market research,
qualitative research
1 comments

## Saturday, October 24, 2009

### Data Mining and R

This post lists a few data mining resources in R. I also provide a few observations on the distinction between data mining, data analysis, and statistics as it pertains to the analysis work that I do in psychology.

## Friday, October 23, 2009

### Syntax Tips for Efficient Variable Selection in SPSS

This post discusses a few tricks for efficiently using syntax in SPSS. The suggestions aim to make variable selection more efficient and less error-prone. Specifically, an example is given of how to efficiently run a reliability analysis on a set of scales. The post is aimed at researchers using SPSS who are just starting to learn about the importance of Syntax.

## Wednesday, October 21, 2009

### Introduction to Twitter | One Academic's First Steps

I have just started using Twitter. This post documents my experience. My aim is to give some suggestions to others who might be considering the adoption of Twitter.

## Tuesday, October 20, 2009

### Comments on "Data Intensive Scientific Discovery"

An interesting book has been published free online on the future of the scientific method and the role of computing, software, and information systems: Data Intensive Scientific Discovery

The ideas link in with the concerns of myself and others with reproducible research, data sharing, data analysis, and open publishing.

The ideas link in with the concerns of myself and others with reproducible research, data sharing, data analysis, and open publishing.

By
Jeromy Anglim
on
Tuesday, October 20, 2009
Labels:
data sharing,
reproducible research
0
comments

### What's in a Name? 21st Century Problems: Searching for PASW version 18

Most people now know that IBM has acquired SPSS, and SPSS the software product has changed it's name to PASW. I have often observed name changes with interest. Kentucky Fried Chicken (at least in Australia) decided long ago to change its name to KFC, possibly because Kentucky was too American, Fried implied fat and unhealthy food, and chicken was too limiting. Likewise, SPSS decided long ago to distance itself from being just a statistics package for the social sciences.

IBM has now released version 18 of PASW. I was trying to find out what were the new features in version 18, when I stumbled on a potential problem with the new name, and perhaps some reasons why IBM may want to move out of troubling teen version numbers as quickly as possible.

IBM has now released version 18 of PASW. I was trying to find out what were the new features in version 18, when I stumbled on a potential problem with the new name, and perhaps some reasons why IBM may want to move out of troubling teen version numbers as quickly as possible.

### Focus Groups Should Not Be Used to Measure Attitudes of the Population | Myki Case Study

Victoria is in the process of adopting a new public transport ticketing system called Myki based on an electronic card. It's delivery is late and the project is over budget. The system has become a political issue. It was interesting to read the following statement:

"[MyKi project’s new spokeswoman] said that Government focus groups had shown that Melburnians were looking forward to using the new card." - TheAgeI just wanted to make a few comments about problems in the reasoning of the above quote.

By
Jeromy Anglim
on
Tuesday, October 20, 2009
Labels:
focus groups,
market research,
opinion,
surveys
0
comments

## Monday, October 19, 2009

### Getting Started with Social Network Analysis

I have presented research on social network analysis to several forums including to organisational and educational psychology audiences. In these settings the audience varies substantially in their prior exposure to social networks analysis. Researchers new to social network analysis often then ask me where they should start in order to learn about the theories and methods of social network analysis. This post aims to provide some links to get such an interested researcher started.

### How to conduct a social network analysis: A tool for empowering teams and work groups

In 2007 I presented a talk discussing ways that social network analysis could be used as a consulting tool to improve team functioning. I'd earlier done some consulting work with Lea Waters applying social network analysis to understand team dynamics in professional white-collar teams. The experience highlighted the value of social network analysis as well as several of the methodological and practical issues that arise when using social network analysis as a consulting tool. The slides from the talk are made available to anyone interested.

### Job Satisfaction | Measurement, Scales, Facets

I was just reading through a section on job satisfaction in Landy and Conte's 2010 I/O psychology textbook

*Work in the 21st Century*(3rd edition). The aim of this post is to comment on theories of job satisfaction and issues associated with job satisfaction measurement. I use Landy and Conte's text book (my favourite I/O textbook) as a frame of reference to guide discussion.### Comments on the "R Clinic"

Theresa Scott runs an

Theresa has also developed a set of course notes on R, R Commander, Latex and Sweave, and Excel.

*R Clinic*at Vanderbilt. Researchers bring their questions along to weekly sessions and some answers are posted on this website. It's great to see the combination of statistical consulting services and public posting of answers for the benefit of all.Theresa has also developed a set of course notes on R, R Commander, Latex and Sweave, and Excel.

### Analysing ordinal variables

Ordinal variables create challenges for analysis. This post discusses: (a) definitions and distinctions related to ordinal variables, (b) theoretical issues related to ordinal variables, and (c) options for analysing ordinal variables.

By
Jeromy Anglim
on
Monday, October 19, 2009
Labels:
correlation,
ordinal variables,
polychoric
1 comments

## Friday, October 9, 2009

### Comments on "Ecological Statistics with R"

Didrik Vanhoenacker has put together a site called Ecological Statistics with R.

### Introduction to SPSS Syntax | Advice for Conducting Reproducible Research

By
Jeromy Anglim
on
Friday, October 09, 2009
Labels:
programming,
reproducible research,
SPSS
2
comments

## Thursday, October 8, 2009

## Wednesday, October 7, 2009

### Efficient Variable Selection in R

This post sets out my procedure for efficiently and reliably selecting variables from a data.frame in R

## Monday, October 5, 2009

### Including R Code in a Blog Post

This post discusses ways of including formatted code in a blog post.

### Practical Tips on How to Conduct a Sophisticated Online Psychological Experiment

This post discusses strategies for conducting an online psychological experiment. The material was written in May 2008, and I have not yet got round to publishing it in an official outlet, and perhaps I never will. It's mainly just practical advice. Thus, it is provided online with the aim of sharing the ideas. I have other posts on Inquisit where I share sample scripts.

By
Jeromy Anglim
on
Monday, October 05, 2009
Labels:
experiments,
Inquisit,
reaction time
5
comments

### Analysis of a Multiple Choice Test | Getting Started

This post discusses how to perform a basic reliability analysis of a multiple choice test.

By
Jeromy Anglim
on
Monday, October 05, 2009
Labels:
ability,
reliability,
scales,
tests,
validity
0
comments

## Sunday, October 4, 2009

### Calculating Scale Scores for Psychological Tests

This post discusses how to calculate scale scores for multi-item scales. A lot of psychological research uses multi-item scales (e.g., personality tests, symptoms check lists, surveys, etc.). This post focuses on the issues involved with computing these scale scores.

### Producing a Table of Item Descriptive Statistics

The following post sets out how to present a table of descriptive statistics for a set of items using SPSS, Excel, and Word. At the bottom of the post, I've got an example of doing it in R.

By
Jeromy Anglim
on
Sunday, October 04, 2009
Labels:
descriptive statistics,
SPSS,
surveys,
tables
1 comments

## Saturday, October 3, 2009

### Creating Instructional Videos and getting Screen Captures with Jing

This post discusses one way of getting screen captures from your desktop and creating short instructional videos of actions on a computer.

### Scoring a Multiple Choice Test in SPSS using DO REPEAT

How do you score a multiple choice test in SPSS? This post shows you how.

### Data Mining and Statistics Video Course

David Mease has an online course presented with complete videos (Statistics 202: Statistical Aspects of Data Mining ). The course uses Excel and R.

## Friday, October 2, 2009

### Newspaper Reports IQ to be 180 | Is it True?

I was reading TheAge. Google is bringing out Google Wave. As part of the story they interview an Australian engineer on the project:

"Nigel, who has an IQ of 180, is also a maths whiz.." - The AgeThis got me thinking. What does it mean to have a 180 IQ. IQ is a norm score. IQ typically has a mean of 100 and a standard deviation of 15. Thus, I asked the following questions:

- What's the probability of having an IQ of 180 or higher?
- One in how many people would have an IQ 180 or higher?
- What's is the probability that someone who a newspaper reports as having a 180 IQ or higher, actually has an IQ of 180 or higher?

### Windows XP Virtual Desktop Manager

This post discusses how to set up multiple virtual desktops on Windows XP. Some of the benefits are also discussed.

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