SI-CHAID 4.0

SI-CHAID® 4.0

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"SI-CHAID 4.0 provides a level of sophistication for gaining insight into segmentation of complex structures containing multiple correlated dependent variables using simple-to visualize trees."

Ken Deal
Marketing Research Magazine, Summer 2005

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Overview

SI-CHAID is a program for performing CHAID (CHi-squared Automatic Interaction Detector) analyses. Results can be displayed simultaneously in the form of an intuitive tree diagram, crosstabulations, and a gains chart summary.

Capabilities

Define

The Define part of the program is used to set up a CHAID Definition (.chd) file with the File → New command, or alter the specifications of an existing .chd file with File → Open. The typical setup includes the selection of the dependent variable, the predictor variables, the combine-type of the predictors, and various options for growing the tree (stopping rule, significance levels, etc.). Define may also be used to enter or modify scores for the categories of the dependent variable when the ordinal algorithm is specified. The model specifications, which are saved with a .chd extension, can be inspected with a text editor (Notepad, for example).

Explore

The Explore part of the program allows you to grow or alter a SI-CHAID Tree, automatically or interactively, using the settings given in a previously saved (.chd) file. It can also be used to produce crosstabulations, gains charts, and if-then-else source code statements that can assist in scoring your data file.

Features

Tree Diagram

Tree nodes have detailed information which may be customized using the Tree Node Display panel. From this view the SI-CHAID model may be modified by growing, pruning, or restoring previously saved tree branches or by rearranging category groupings. Operations on the tree take place on the current node which is the highlighted (active) node. Clicking on a node makes it the current node. Multiple Tree Diagram windows may be open, each displaying different node contents or other customized views.

Gains Chart

The Gains chart provides various tabular representations of the terminal nodes (segments) from the SI-CHAID tree which may be customized using the Gains Items panel. Multiple Gains Chart windows may be open, each with its unique customized appearance.

Table

The table provides tabulation of a single predictor by the dependent variable. The cell entries can be customized using the Table Items panel.

Linking with Latent GOLD and/or LG Choice

Each of our flagship modeling tools Latent GOLD 4.5 and Latent GOLD Choice 4.5 provide a direct link to SI-CHAID 4.0. With this option, a CHAID Definition (.chd) file is automatically generated immediately following model estimation which can then be used as input to SI-CHAID 4.0. Learn More

Read the groundbreaking article An Extension of the CHAID Tree-based Segmentation Algorithm to Multiple Dependent Variables, Magidson and Vermunt (2005). and follow along with Tutorial 4.

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