ConstructMap

ConstructMap is software designed for conducting simple psychometric analyses on categorical data. It has been developed as a companion to Constructing Measures (Wilson, 2005), an introductory book on assessment in the social sciences.

ConstructMap can run analyses on dichotomous data using the Rasch Model or on polytomous data using the Partial Credit Model or the Rating Scale Model. In addition to the model results, ConstructMap can produce several plots, such as Wright Maps, Item Fit Plots and Item Characteristic Curves, to help in the interpretation of those results.

About

ConstructMap is a graphical, menu-driven software package that combines a multidimensional IRT engine for estimating item and person parameters with tools for managing cross-sectional and longitudinal student response data and interpreting findings from such data. Graphical maps and reports are designed for use in settings in which progress on multiple measures can be examined and analyzed. Users can select expected a posteriori (EAP), maximum likelihood, or plausible value estimates of multivariate proficiency estimates. ConstructMap accepts dichotomous, rating scale, or partial credit items in between-item (each response is an indicator of a single dimension) or within-item (a response may be an indicator of multiple dimensions) multidimensional models.

ConstructMap produces Wright maps that align person estimates with item estimates on a logit scale, and item characteristic and cumulative probability curves. It estimates item parameters using marginal maximum likelihood techniques. Integrals are approximated using quadrature or Monte Carlo methods, with user-defined number of nodes and upper and lower bounds of the latent traits. Users may also define convergence criteria and iteration limits. Differential item functioning and item bias can be explored by partitioning the response data on user-defined grouping criteria. Traditional item-analysis statistics are produced by ConstructMap as well as item response modeling fit statistics.

ConstructMap produces the following reports and maps:

Reports on Groups of Students	Reports on Individual Students	Item Reports
Frequency Map Performance Map Ability Estimates Report Ability Estimates by Level Report Correlate Groups Report Correlate Forms Report	Profile Map Performance Map Activity Averaging Map Item Tracking Map Diagnostic Map Graphical Diagnostic Map Responses Report	Wright Map Graphical Wright Map Item Estimates and Fit Graph Classical Item Statistics Construct Map Fit Graph of Items Fit Graph of Steps Item Characteristic Curves Item Cumulative Probability Curves Test Information Curve

Announcements

November, 2012 - Revised textbook materials and exercises for "Constructing Measures".
November, 2010 - A new release of Construct Map (4.6) is now available.

Downloads

ConstructMap 4.6 beta OS X version (22 MB)

Last updated: November 01 2010

ConstructMap requires Java: Use it only if you have the latest updates on Java for Macintosh OS X 10.4+ operating system.

· Run the installer package and follow the on screen instructions.

· Finally, go to the application's folder and launch ConstructMap.

ConstructMap 4.6 beta Windows version (36 MB)

Last updated: November 01 2010

ConstructMap requires Java: During the installation process, the installer can detect that you have Java v1.5 or higher installed and will not overwrite it.

ConstructMap 4.4 OS X version (11 MB)

Last updated: January 07 2009

ConstructMap requires Java: Use it only if you have the latest updates on Java for Macintosh OS X 10.4+ operating system.

· Unzip the file

· Run the installer package and follow the on screen instructions.

· Finally, go to the application's folder and launch ConstructMap.

ConstructMap 4.4 Windows version (24 MB)

Last updated: January 07 2009

ConstructMap requires Java: During the installation process, the installer can detect that you have Java v1.5 or higher installed and will not overwrite it.

Documentation

Note: You can find the case studies and study guides that accompany the book Constructing Measures here.

ConstructMap Manual

Quick Start Guide v4.4

Minimal set of instructions to quickly start using ConstructMap

Study Guides

Using ConstructMap

Brief overview of the process of loading data, analyzing and generating reports with ConstructMap.

Reliability Study Guide

Download documentation and sample data about how to get reliability indices from ConstructMap

Exercises

Exercise 1

This exercise is to help users understand and practice the process of entering their data into ConstructMap.

Exercise 1 Data

Contains all of the data files that go along with the Construct Map Exercise 1.

Exercise 2

This exercise is to help users understand and practice the process of calibrating (estimating item parameters) their data in ConstructMap.

Exercise 3

This exercise guides the users on generating ConstructMap reports using the Textbook Materials above.

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