How to Modify a Design from Monadic Sequential to Block Design
Introduction
When creating a questionnaire, it could occur that you need to modify a design that initially presents samples to panelists in a monadic sequential order and instead switch to a block design where all samples are presented at once.
In this article, we will delve into the differences between monadic sequential and block designs and explore the steps required to successfully transition from one to the other.
- Monadic Sequential Design: In a monadic sequential design, each panelist evaluates the products or samples one after another, typically in a predetermined order. For example, if there are three products, the first panelist evaluates product A, followed by product B, and finally product C. This design ensures that each panelist experiences the products independently, minimizing potential biases resulting from comparing multiple samples simultaneously.
- Block Design: In contrast, a block design presents all the samples to the panelists simultaneously. Instead of evaluating products sequentially, panellists view and assess all the products together on a single screen or in a single session. This design allows for a direct comparison between the samples, enabling panellists to evaluate their similarities, differences, and overall preferences more efficiently.
In this article, we will explore the steps to achieve this modification and ensure a smooth transition.
Change the Design Settings
Open your project and navigate to the Design Section and click on "Generate Design". This will present you with the current design settings that need to be modified.
Change the Multiproduct Option: In the design settings, you will find an option called "Multiproduct." This option determines how the products or samples are presented to the panelists. To switch to a block design, select the "1 combination" option. By choosing the "1 combination" option, you are instructing the software to group all the products into a single block. In a block design, all the samples will be displayed simultaneously on one screen, rather than one after another. After making the necessary changes to the design settings, click on the "Generate" button. This action will generate a block for each set and ensure that all the products within the set are displayed together.
Change the Question Settings
With the switch to a block design, it is crucial to ensure that the questions in your questionnaire are asked for all three products in the design.
Navigate to your questions now and for each questions you want to ask to all the product go to the question settings and select the "Multi Sample" option. This arrangement will present all samples in a column, one after another, within the same screen for questions regarding specific attributes or characteristics of the products.
If desired, you can further customize the layout of these questions. By selecting the "Multi Pos Hori" option, you can distribute the samples in columns based on your preferred configuration. You can specify the desired width by adjusting the "Force Width" setting. For example, if you prefer to display your three samples in a single line rather than a column, you can select a force width of three columns.
By following these steps, you can successfully modify your design from a monadic sequential order to a block design, ensuring that all samples are presented to the panelists at once.
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