Winningtemp's unique employee engagement survey does not send random questions to you every week. The questions you receive depend on your responses to former surveys and how often different questions have been asked. The algorithm wants to ensure that a user gets a variety of questions but also understands what questions are most important for the user. This is to ensure that the user feels engaged and motivated to continue answering the surveys and, at the same time, ensure that all employee's opinions are taken into account to get a correct temperature.
Winningtemp's algorithm analyses response patterns continuously and asks questions based on relevance and variation. This means that your colleagues will probably get different questions every week. However, the algorithm only analyses responses, and there is no way of knowing which employee responded to which question.
For example: If you answer negatively to a question on stress one week, you may get a similar (or even the same) question the following week because the system wants to know if the responder was stressed just once or if it's a constant issue and needs to be addressed.
The algorithms' findings are shown as Insights, which you can read more about here: What are Insights?.