Question Title


You are invited to participate in a research study conducted by Prof. Shigeto Kawahara (Keio University). The purpose of this research is to gather data about your intuitions about linguistic sounds.

Approximately 50 speakers will participate in the study, and each individual's participation will last no more than 20 minutes. You need to be 18 years old or older to participate in this study.

This research is anonymous. Anonymous means that we will record no information about you that could identify you. We will not record your name, address, phone number, date of birth, etc. If you take part in the study, you will be assigned a random code number that will be used on each test and the questionnaire. Your name will not be recorded. Therefore, data collection is anonymous. The research team is the only party that will see the data, except as may be required by law. If this study is published or presented at a conference, only group results will be stated. All study data will be kept for 1 year after the completion of the study. There are no foreseeable risks to participation in this study. There are no immediate benefits for you except that you contribute to the scientific investigations of your language. Neither will you receive direct benefit from taking part in this study.

Participation in this study is voluntary. You may choose not to participate, and you may withdraw at any time during the study procedures without any penalty. In addition, you may choose not to answer any questions with which you are not comfortable.

If you have any questions about the study or study procedures, you may contact Prof. Kawahara at

Please print out a copy of this consent form for your records. By participating in this study, you agree to be a study subject.

Please press the "next" button below if you agree to participate in this study.