Advanced Methods and Models
in Behavioral Research
• Chris Snijders
• Gerrit Rooks
ToDo:
Studyweb!
Enroll in 0a611
• 3 ects
• http://www.chrissnijders.com/ammbr (=studyguide)
• literature: Field book + separate course material
• laptop exam (+ assignments)
Advanced Methods and Models in Behavioral Research – 2010/2011
The methods package
• MMBR (6 ects)
– Blumberg: algemeen: vraagstelling, betrouwbaarheid,
validiteit etc
– Field: SPSS: factor analyse, multiple regressie, ANcOVA,
sample size etc
• AMMBR (3 ects)
- Field (deels): logistische regressie
- literatuur via website:
conjoint analysis  multi-level regression
Advanced Methods and Models in Behavioral Research – 2010/2011
Models and methods: topics
• t-test, Cronbach's alpha, etc
• multiple regression, analysis of (co)variance and
factor analysis
• logistic regression
• conjoint analysis / repeated measures
• Stata naast SPSS
• “Naar nieuwe vragen”
• Oefenen (een beetje) met data verzameling
Achterliggende gedachte: nu moet je het zelf kunnen
Advanced Methods and Models in Behavioral Research – 2010/2011
Methods in brief (1)
• Logistic regression: target Y, predictors Xi.
Y is a binary variable (0/1).
-
Why not just multiple regression?
Interpretation is more difficult
goodness of fit is non-standard
...
Advanced Methods and Models in Behavioral Research – 2010/2011
Methods in brief (2)
• Conjoint analysis
Underlying assumption: for
each user, the "utility" of a
product can be written as
-10 Euro p/m
- 2 years fixed
- free phone
- ...
How attractive is this
offer to you?
U(x1,x2, ... , xn) = c0 + c1 x1 + ... + cn xn
Advanced Methods and Models in Behavioral Research – 2010/2011
Conjoint analysis as an “in between method”
Between
Which phone do you like and why?
What would your favorite phone be?
And:
Let’s keep track of what people buy.
Advanced Methods and Models in Behavioral Research – 2010/2011
Coming up with new ideas (3)
“More research is necessary”
But on what?
YOU: come up with sensible new
ideas, given previous research
Advanced Methods and Models in Behavioral Research – 2010/2011
Stata next to SPSS
•
It’s just better
•
Multi-level regression
is much easier than in
SPSS
•
It’s good to be
exposed to more than
just a single statistics
package (your knowledge
(faster,
better written, more
possibilities, better
programmable …)
should not be based on
“where to click” arguments)
•
More stable
•
Supports OSX as
well… (anybody?)
Advanced Methods and Models in Behavioral Research – 2010/2011
(I think)
But …
• Output less “polished”
• It takes some extra work
to get you started
• The Logistic Regression
chapter in the Field book
uses SPSS (but still readable
for the larger part)
• (and it’s not campus
software, but subfaculty
software)
• Installation …
Advanced Methods and Models in Behavioral Research – 2010/2011
Advanced Methods and Models
in Behavioral Research
To Do
• enroll in studyweb (0a611)
• Read the Field chapter on logistic regression
Advanced
Advanced
Methods
Methods
and Models
and Models
in Behavioral
in Behavioral
Research
Research
– 2008/2009
– 2010/2011
10