Comment Pieces

Repeated Measures ANOVA versus Linear Mixed Models.

March 9, 2017

You want to measure performance of the same individual measured over a period of time (repeated observations) on an interval scale dependant variable, but, which procedure to use?  So we are looking for an equivalent of the paired samples t-test, but we want to allow for two or more levels of the categorical variable i.e. pre, during, post. The Repeated Measures ANOVA [SPSS: ANALYZE / GENERAL LINEAR MODEL / REPEATED MEASURES] is simpler to use but sadly its often not as accurate and flexible as using Linear Mixed Models (SPSS: ANALYZE / MIXED MODELS / LINEAR). Reminder that the Linear [READ MORE]

Statistical Modeling: A Primer (by Kevin Gray)

March 7, 2017

Interesting article by Kevin Gray at Cannon Gray (http://cannongray.com) Model means different things to different people and different things at different times. As I briefly explain in A Model’s Many Faces, I often find it helpful to classify models as conceptual, operational or statistical. In this post we’ll have a closer look at the last of these, statistical models. First, it’s critical to understand that statistical models are simplified representations of reality and, to paraphrase the famous words of statistician George Box, they’re all wrong but some of them [READ MORE]

Skepticism in Social Media

June 15, 2016

I was talking this morning with someone about which blogs that review products and/or services are the most popular around my part of the world – Asia. I consulted Google Search but could not come up with an answer. I did however come across a recent report (June 25, 2012) by Kristen Sala, Senior Manager, Electronic Media at Cision (a public relations software and media tools firm) that lists the Top 50 independent “Product Review Blogs” in North America. Mama-B Blog is first, followed by Computer Audiophile, and 48 others.  Still, I could not find much information [READ MORE]

Marketing research and theory

November 12, 2015

  I was inspired by the article (or open letter) written by Terry H. Grapentine and R. Kenneth Teas entitled “From Information to Theory: it’s time for a new definition of marketing research” which appears on the AMA’s website, marketingpower.com (accessed October 2012).  The authors debate the importance of theory in marketing research and urge for the rightful place of “theory” and the “creation of knowledge” in the American Marketing Association’s definition of marketing research.    They propose a new definition of marketing [READ MORE]

Jack Honomichl dead aged 85

December 9, 2013

Jack Honomichl, a widely respected commentator on the market research industry and founder of the Inside Research newsletter, passed away on 8 December. He was 85. Jack is well know for the much respected annual “Honomichl Top 50 Report”. The latest report (2013) can be viewed on the AMA website. Research-Live posted a commemoration by Inside Research editor and publisher Laurence Gold who remembers his friend and [READ MORE]