Professor of Psychology and Education |

Here's an SPSS
macro for **univariate and multivariate tests of skew and kurtosis**. (from
my 1997 Psychological Methods
article).

Note: this version is updated slightly to deal with some syntax changes in more recent versions of SPSS.

**Instructions:**
Save the macro to your hard drive. Open the data you wish
to analyze, here's some sample **data**
(Fisher's Iris data). Open
a syntax window

and enter the commands given in the header of the macro, here's
an example of a **syntax**
file. You simply need to edit the INCLUDE statement to give the

directory where the
macro (normtest.sps) is located and the
VARS statement to give the names of the variables in your data file. Have fun
analyzing!

NOTE: to get the plot of Mahalanobis distances, you need to have permission to write to the hard drive in the directory you run the macro in.

Here's an SPSS
macro for **Mardia's multivariate skew** (more computationally intense).

Here's syntax for a Latent Gold 4.5 program that fits an **item signal detection model** (see
my 2011 JMP article).

Note: save the file and you can use wordpad to open it. Here are **data** for the recognition memory example

discussed in the article, with 21 subjects and 120 trials per subject, with 60 old words and 60 new words.

Here's syntax for a Latent Gold 4.5 program that fits the **re-parameterized DINA model** (see
the Appendix of my 2011

Applied Psychological
Measurement article). Here are Tatsuoka's **fraction subtraction data** for the example discussed

in the article. Here's a LEM program for the **RDINA** model and the fraction subtraction **data** (recoded for LEM).

Here's a LEM program for the **Higher-Order RDINA** model and the fraction subtraction LEM data.

Here's syntax for a Latent Gold 4.5 program that fits a **mixture signal detection model** (see
my 2010 JMP article). Here are **data**

for the example, a subject from Swets, Tanner, & Birdsall, 1961 (note: trials are not actual trials, just observation numbers).

Here's syntax for a Latent Gold 4.5 program that fits a **random coefficient SDT** model by introducing a continuous latent variable

(see my 2010 JMP article). Try it with the Swets et al. data given above and compare results to the unequal variance model.

Here's an Mplus program that fits a **random coefficient SDT** model as a * multilevel model* for a

purposes (see my 2010 JMP article). Here are Swets et al.'s

Here's SPSS syntax to fit the

Here are Swets et al.'s

Here's SPSS syntax to fit the

Here are the

Here are LEM and Mplus programs for a

Here are LEM
and Mplus programs
for a **latent class signal detection model** (see
my 2002 Multivariate Behavioral
Research article).

Here's an aML
program for a **multivariate signal detection model** with sample selection (see
my 2003 Journal of Mathematical
Psychology article).

Here's an Mplus
program for a **multivariate signal detection model** (see
my 2003 Journal of Mathematical
Psychology article & 2000
EMPG presentation).

Here are SAS
and SPSS programs for
**signal detection models** expressed as generalized linear
models (from my 1998 Psychological
Methods article).

**Pictures:**

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**Printing Internet
Files**: To print
files downloaded from the Internet, you'll probably need:

One type of file has a **.pdf**
extension and requires Adobe Acrobat reader; instructions are
given at the website. You'll need this to read and print copies

of some of the papers given in my publications, presentations,
and course syllabi sections.

**POSTSCRIPT**

Some people use Postscript files (**.ps**
extension), which can be viewed and printed using Ghostscript and Gsview.
Here you can download self-extracting

files that contain Gsview and Ghostscript for Windows.