Randomisation block

Randomisation blocks can be used to organise and shuffle a group of questions and blocks within the experiment.

Setting up a randomisation block

Follow these steps to set up a randomisation block:

1. Add a randomisation block

Navigate to the Add questions tab and click on the Add question button at the bottom of the page.

On the Add or import questions pop-out, select the Add a new question tab and click on the Randomisation block question card to add it to the experiment.

Adding a randomisation block to the experiment

2. Organise the randomisation block

Once you add the randomisation block, you can:

  • Click-and-drag to move the block.
  • Rename the block.
  • Click-and-drag questions into the block.
Randomisation block setup

3. Specify the maximum number of questions to display per respondent

You can enter your preferred maximum number of questions to display per respondent.

By default, the field is set to 0 to display all questions in the block to all respondents. In this example, 3 is entered, then each respondent will only see three randomly selected the questions out of the four questions in the block. As each question in the block is entirely randomised, it is not guaranteed that each will be shown to an equal number of participants. However, questions are allocated to an approximate equal number of participants, e.g. for this randomisation block, each question will be shown to approximately 75% of participants.

Set maximum number of questions to display per respondent for randomisation block

Respondent view

The example below shows how respondents are shown three survey questions randomly out of the block of four questions.

Respondent view of randomisation block

Randomisation block outputs

The randomisation block outputs are subject to the questions included. Aside from question outputs, the randomisation block outputs also includes the number of participants who saw and answered each question within the block.

Simple block outputs


Can I randomise the order of question groups i.e. randomisation blocks?

Randomising question groups on Conjoint.ly is easy using nested randomisation blocks. Two or more randomisation blocks can be nested inside another block, as shown below:

Nested randomisation blocks on Conjoint.ly