Methods and apparatus to gather and analyze electroencephalographic data

1. A headset comprising:

a cap to be worn on a head of a person, the cap including a first opening; and

an electrode holder including:

a base in the first opening of the cap, the base including a second opening aligned with the first opening; and

a grip cantilevered from the base the grip extending upward from the cap and away from a central axis of the second opening such that a gap is defined between the grip and the cap, the gap sized to receive a finger of a user, the gap maintained while an electrode is inserted through the second opening toward the head of the person.

2. The headset of claim 1 , wherein the grip is a first grip and the gap is a first gap, the electrode holder further including a second grip extending upward from the cap and away from the central axis of the second opening such that a second gap is defined between the second grip and the cap.

3. The headset of claim 2 , wherein the second grip extends away from the central axis of the second opening in a direction opposite of the first grip.

4. The headset of claim 2 , wherein the finger is a first finger, wherein the first gap is positioned to receive the first finger of the user, and the second gap is positioned to receive a second finger of the user.

5. The headset of claim 1 , further including the electrode.

6. The headset of claim 5 , wherein the electrode includes a housing and a pin extending from a first end of the housing.

7. The headset of claim 6 , wherein the housing includes a handle having a plurality of grips or ribs.

8. The headset of claim 7 , wherein the handle is operable to change a position of the electrode relative to the second opening.

9. The headset of claim 7 , wherein the handle is an insulator.

10. The headset of claim 5 , wherein the electrode holder is a first electrode holder, further including a second electrode holder having a third opening defined through the cap, the electrode insertable into the third opening.

11. The headset of claim 5 , wherein the electrode is removable from the cap.

12. The headset of claim 5 , wherein the electrode is a first electrode, further including a second electrode interchangeable with the first electrode and insertable into the second opening.

13. The headset of claim 1 , wherein the base has a groove in an outer surface of the base, and the cap extends into the groove.

14. An apparatus comprising:

a cap be worn on a head of a person, the cap including a first opening;

an electrode holder including:

a base coupled to the cap at the first opening, the base including a second opening aligned with the first opening;

a first grip cantilevered from the base, the first grip extending upward from the base and away from a central axis of the second opening; and

a second grip cantilevered from the base, the second grip extending upward from the base and away from the central axis of the second opening; and

an electrode insertable into the second opening of the base, the first grip and the second grip to provide leverage when changing a position of the electrode relative to the second opening.

15. The apparatus of claim 14 , wherein the second grip extends away from the central axis of the second opening in a direction opposite of the first grip.

16. The apparatus of claim 14 , wherein the electrode includes a housing, a pin extending from a first end of the housing, and a handle coupled to a second end of the housing.

17. A method comprising:

placing a cap of a headset on a head of a person, the cap including a first opening, the headset including an electrode holder, the electrode holder including:

a base in the first opening of the cap, the base including a second opening aligned with the first opening;

a grip cantilevered from the base the grip extending upward from the cap and away from a central axis of the second opening such that a gap is defined between the grip and the cap, the gap sized to receive a finger of a user; and

a retainer coupled within the second opening;

inserting an electrode into the second opening while the cap is disposed on the head of the person, the gap maintained while the electrode is inserted into the second opening and toward the head of the person, the electrode including an elongated sheath having a plurality of ribs to engage the retainer; and

adjusting a depth of the electrode within the second opening by removably securing the electrode in one of a plurality of discrete positions having different depths of insertion relative to the second opening defined by an interface between the plurality of ribs and the retainer, the grip to provide leverage when changing the depth of the electrode.

18. The method of claim 17 , further including indicating, via a display screen, when the electrode is inserted in the second opening and engaged with the retainer.

19. The method of claim 18 , further including indicating, via the display screen, when the electrode is in contact with the head of the person.

20. The method of claim 17 , further including:

analyzing a quality of a signal gathered by the electrode;

performing a comparison of the quality to a threshold quality;

determining that the quality is acceptable or unacceptable based on the comparison; and

indicating, via a light, whether the quality is unacceptable.