What is the default behavior of a Randomizer in Qualtrics?

The default behavior of a Randomizer in Qualtrics is indeed to randomize the order of nested elements. When you use a Randomizer, it takes a set of items (which can include questions, blocks, or embedded data) and shuffles their order each time the survey is taken. This ensures that each respondent may see the elements in a different sequence, which helps to eliminate order bias in responses.

By default, all items within the Randomizer are considered for randomization unless otherwise specified. This functionality is crucial for experimental designs where the order of questions can influence responses, allowing researchers to collect more reliable data by mitigating potential biases.

The other answers pertain to functionalities that may not align with the typical operation of a Randomizer, emphasizing specific behavior, such as displaying in a set order or excluding elements, which does not represent the core purpose of randomizing.