Psychological Tests and Test Interpretation Tools

W. Joel Schneider, Ph.D.

**Software**

The Compositator

Published by WMF Press, the Compositator
creates custom composite scores from subtests of the WJ III NU.
It uses multiple regression, path analysis, and a host of other
features to enhance the clinical interpretation of the WJ III
NU.

Compositator
video tutorial here.

In its orginal incarnation, the Compositator was
an Excel spreadsheet with far fewer capabilities. However,
because it is more generic (it can be used with any tests for
which you know the test intercorrelations and test reliability
coefficients), I have made it available
here. It is not published by WMF Press.

TableMaker for
Psychological Evaluation Reports

The TableMaker
is designed to help providers of psychological assessments
organize and present test data in a simple, efficient, and
theoretically informed manner. You enter an evaluee's test
scores in an order that is convenient and theoretically
organized tables are generated in MS Word.

It is free. For now, it runs on Windows only.

TableMaker
video tutorial here.

Estimating Latent
Scores in Individuals

I wrote a commentary in a special issue
of the Journal Psychoeducational Assessment. My article
proposes a new way to interpret cognitive profiles. The basic
idea is to use the best available latent variable model of the
tests and then estimate an individual's latent scores (with
confidence intervals around those estimates). I have made two
spreadsheets available, one for the WISC-IV and one for the
WAIS-IV.

Five-Factor
Model of the WISC-IV

Four-Factor Model of the WAIS-IV

I decided not to provide a spreadsheet for the
five-factor model of the WAIS-IV because Gf and *g* were
so highly correlated in that model that it would be nearly
impossible to distinguish between Gf and *g* in
individuals. You can think of Gf and *g* as nearly
synonymous (at the latent level).

Schneider, W. J. (2013). What if we
took our models seriously? Estimating latent scores in
individuals. *Journal of Psychoeducational Assessment,
31*, 186–201.

Cognitive
Rehabilitation Suite

I have created a suite of over 25 repeatable
tests. For now, none of them have been normed but they can be
used for cognitive rehabilitation and qualitative assessment.
The suite includes tests of attention, long-term and working
memory, reasoning, reaction time, executive functions and
visual-spatial processing.

SPSS Syntax

Cross-Product Regression Macro (useful for testing hypotheses about moderation)

**Excel Test Scoring and Interpretation Tools
**

Making predictions
about individuals using multiple regression and custom
composite scores (Allows you to combine psychological test
scores and create multiple regression formulas that can be
applied to individuals)

Test Table Maker
(Creates tables for your reports. Video
Tutorial)

Generalized
Relative Proficiency Index (Extends the usefulness of the
RPI from the Woodcock family of test batteries)

Difference
Score
Replication Predictor (Calculates the probability of
replicating difference scores larger than a specific criterion)

Base
Rates (Calculates positive and negative predictive
power and other useful statistics given a test's specificity
and sensitivity)

Confidence
Intervals (Calculates the confidence interval of a test,
given the reliability coefficient)

Standard
Score Converter (Convert any standard score to any other
standard score (e.g., scaled scores, T-scores, and index scores)

Statistical Tools

Area Under the
Normal Curve (Graphic tool that calculates the proportion
under a normal curve)

Understanding Statistical
Power (Basic tool for calculating statistical power for
known distributions. Has an interactive graph of the null and
alternative distributions.)

Z-test (Conducts a
z-test. Has an interactive graph of the normal distribution)

1-Sample t-test
(Conducts a 1-sample t-test. Has an interactive
graph of the t distribution.)

Basic Statistical Tables and Tools** **(F, t, and
Z-Score tables, Area under normal curve, Z-test, 1-sample
t-test)

Questions and requests can be directed to: wjschne@ilstu.edu