In a single-blind study, which group remains unaware of the expected behaviors?

In a single-blind study, the participants are unaware of the specific conditions or treatments they are receiving. This design is specifically meant to reduce potential biases that the participants' expectations might introduce into the study's outcomes. By keeping the participants unaware of whether they are in a control or experimental group, researchers can more reliably assess the effects of the treatment without the influence of the participants' beliefs or expectations about how they should behave or what the results should be.

The experimenter, on the other hand, knows the details of the study and the expected behaviors, which is a key aspect of the single-blind design. This allows them to administer the treatment and measure outcomes effectively while still providing a level of control against participant biases. In summary, the primary characteristic of a single-blind study is that it keeps participants in the dark about their assigned conditions, ensuring that their responses are not influenced by preconceived notions about what they are expected to experience.