Table 2 List of twenty six (for P1) or thirty (for P2) questions used for Exp3 classified into three sessions.

From: Development of an electrooculogram-based human-computer interface using involuntary eye movement by spatially rotating sound for communication of locked-in patients

Session - Trial

Questionnaire

Expected Result

P1

P2

Session 1

1–01

Is your name “OOO”?

Y

Y

1–02

Is your nationality Korean?

Y

Y

1–03

Is your marital status “married”?

Y

Y

1–04

Do you live in Seoul?

Y

Y

1–05

Do you have children?

Y

N

1–06

Are you a male?

N

Y

1–07

Are you currently in a hospital?

N

Y

1–08

Are you 30 years old?

N

N

1–09

Do you have any pets at home?

N

N

1–10

Are you a student?

N

N

Session 2

2–01

Can butterflies fly?

Y

Y

2–02

Is an apple a fruit?

Y

Y

2–03

Does one plus one equal two?

Y

Y

2–04

Is a piano an instrument?

Y

Y

2–05

Can dogs fly?

N

N

2–06

Are pencils edible?

N

N

2–07

Are dogs insects?

N

N

2–08

Are bears insects?

N

N

2–09

Are bears mammals?

N/A

Y

2–10

Are shells mammals?

N/A

N

Session 3

3–01

Is a guitar an instrument?

Y

Y

3–02

Is the summer in Korea hot?

Y

Y

3–03

Are butterflies insects?

Y

Y

3–04

Can sharks fly?

N

N

3–05

Can cows fly?

N

N

3–06

Are butterflies plants?

N

N

3–07

Are grapes insects?

N

N

3–08

Are horses plants?

N

N

3–09

Are pigs mammals?

N/A

Y

3–10

Are cows mammals?

N/A

Y

Y: 12/N: 14

Y: 16/N: 14

  1. The first session included 10 personal questions with known answers, and the second and third sessions contained basic, general knowledge, yes/no questions.