# Can random assignment be used in a survey

## Can surveys have Random assignment?

Randomizer: (in a survey flow)

**you can randomly present question blocks, Embedded Data, and other Survey Flow elements to your respondents**. Example: You could use the Randomizer element to assign participants to either a control block of questions or an experimental block of questions.## When can you not use random assignment?

Sometimes random assignment is impossible because

**the experimenters cannot control the treatment or independent variable**. For example, if you want to determine how individuals with and without depression perform on a test, you cannot randomly assign subjects to these groups.## What does random assignment allow for?

Random assignment helps

**ensure that members of each group in the experiment are the same**, which means that the groups are also likely more representative of what is present in the larger population.## How do you know if you should use a random sample or random assignment?

So, to summarize,

**random sampling refers to how you select individuals from the population to participate in your study.****Random assignment refers to how you place those participants into groups**(such as experimental vs. control).## Does random assignment prove causation?

No random assignment

Can detect relationships in population, but **cannot determine causality**.

## Does random assignment allow for generalization?

Why random sampling and assignment? Random sampling allows us to obtain a sample representative of the population. Therefore, results of the study can be generalized to the population.

**Random assignment allows us to make sure that the only difference between the various treatment groups is what we are studying**.## Are random assignment and random sampling the same?

Random sampling vs random assignment

**Random sampling (also called probability sampling or random selection) is a way of selecting members of a population to be included in your study.** In contrast, random assignment is a way of sorting the sample participants into control and experimental groups.

## Is random assignment the same as random selection?

Random selection, or random sampling, is a way of selecting members of a population for your study’s sample. In contrast,

**random assignment is a way of sorting the sample into control and experimental groups**.## Is random sampling valid?

Random sampling uses chance to select the sampling units (participants) from the larger population. When random sampling has been employed in a study,

**the unbiasedness of the sampling method is strong evidence for external validity**; we have a much higher belief in generalizations to the larger population.## Why is random sampling not always used?

Among the disadvantages are

**difficulty gaining access to a list of a larger population, time, costs, and that bias can still occur under certain circumstances**.