Tetrad Test

Tetrad Test

Overview

Tetrad test is a discrimination test type that helps you determine if there is a difference between two products by asking panelists to group the four samples into 2 groups of 2. This highly recommended method is useful for a wide range of products including those with known variability, like cookies or pizza, and is a more powerful test; so can be performed with fewer panelists (e.g. 20+). 

The pre-set Tetrad test type template comes distributed with the software for you to use in a click of a button! In this workflow you will learn how to create your own Tetrad test from a template.

Back to back Tetrad tests are advanced feature available in full subscriptions only. Contact our Support Team for more information.


Question Compatibility

The Tetrad test type is compatible with the following question types:
  1. Category
  2. Choose
  3. Comment
Time Delay and Text & Images are compatible with all test types and question types .


Create the Test 

  1. On the Dashboard , in the Folders list on the left, select the folder where you wish to save your new Tetrad test.

    If necessary, use the menu from the vertical three dots to create new sub-folders or to edit existing ones.


  2. Click Create a new test .

  3. Next to the Tetrad test type , click Use .


  4. Type the test name and specify the location for it (in case the folder selected in the first step was not the right one).

  5. Click Create Test . The test will open up.
The Test ID displayed in the top right-hand corner is an important unique identifier useful for test searches. The Test ID can also be found in the Dashboard .

Please have the Test ID handy when you reach out to our Support Team for assistance.

Update the Test

Although the template test has a number of pre-set components that might work for you the way they are, you will still have to update some components to make them reflect your testing needs. Please go through each test tab outlined below and make necessary changes.
  3. The Tetrad question is already added to the test along with the Tetrad related Comment . You can always add a Tetrad related Choose question . The Comment and the Choose questions will be displayed for both groups of samples that the panelist creates.

    For training purposes, you may display the feedback to panelists.



  5. Logistics


Preview and Run the Test

When all test components have been added and configured, you may preview the test and then present it to your panelists.


Analysis

Click the Results tab to access and choose from the following analysis options:
  1. Graphs - Visual representation of the data.

  2. Data - Raw data display in the form of check marks and x marks indicating whether the panelists correctly or incorrectly grouped the similar samples. The Total Correct column provides the count of correct responses per panelist in the test.

  3. Reports - Create now or view previously generated reports. The following reports are compatible with the Tetrad question type:
    1. Standard report - Detailed information about the tabulated results for correct and incorrect responses, d' (d prime), the p-value, and the statistical conclusion.

      If a follow up Comment or Choose questions were included in the test, two tables (for correct response related and incorrect response related Comments or Choose data) per follow up question will be available in the report.

    2. PowerPoint report - Visual representation of the percentages for correct and incorrect Tetrad responses in a PowerPoint Presentation report format.

    3. Raw data export - Choose from the Multivariate, Univariate, and Multivariate Columnar raw data export formats to suit your exporting needs.


    • Related Articles

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      Overview The number of samples and their blinding codes play an important role in your Tetrad test setup. The template test distributed with our software is set up as a single Tetrad test type. The double (back to back) Tetrad test type is available ...

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    • Question Type: Tetrad

      Overview Tetrad test is a discrimination test type that helps you determine if there is a difference between two products by asking panelists to group 4 samples into 2 groups of 2. Unlike most other question types, the Tetrad question is not ...

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      Overview If you would like to ask panelists for their comments on the samples that they grouped together in a Tetrad test, the template Tetrad test type already comes set up with it! With this setup, the analysis will automatically separate the ...

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