We are conducting a paid smartphone research study in Warsaw and are looking for same-gender sibling pairs to participate together in a 90-minute in-person session at our research facility located at Berezyńska 2A, 03-904 Warsaw, Poland.

During the session, participants will test smartphone features and provide feedback. No prior experience is required, and the study is simple and straightforward to complete.

As a thank-you for their time, each participant will receive 285 PLN in compensation.

We are currently recruiting the following participant groups:

Female sibling pairs:

• Age: 36–65
• Age difference between siblings: 1–5 years

Male sibling pairs:

• Age: 36–65
• Age difference between siblings: 1–5 years

Both siblings must attend the session together.