If (and only if) you are under 18 years of age you must get your parent's or guardian's written permission for each of the studies in which you want to participate. Each study has its own unique Parental Permission form. After you choose a study and sign up for it (on the Sona web site), download the Parental Permission form for that study and get the required signature on it. Then take it to the session you signed up for and give it to the researcher. Permission forms are available below and are listed alphabetically by study name.