Data
3,776,018 items of data are available, covering 217,453 participants.
Some values have special meanings defined by Data-Coding
7667.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Array indices run from 1 to 15.
| Maximum | 8 |
| Decile 9 | -3 |
| Decile 8 | -4.333 |
| Decile 7 | -5 |
| Decile 6 | -6 |
| Median | -6.28571 |
| Decile 4 | -7 |
| Decile 3 | -7.2 |
| Decile 2 | -8 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -5.99554
- Std.dev = 2.54458
- 18940 items above graph maximum of 3
- 1768664 items have value -99999 (Not computed)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
166,122 participants, 1,306,465 items
| Maximum | 8 |
| Decile 9 | -4 |
| Decile 8 | -5 |
| Decile 7 | -6 |
| Decile 6 | -6 |
| Median | -6.8 |
| Decile 4 | -7 |
| Decile 3 | -7.667 |
| Decile 2 | -8 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -6.43831
- Std.dev = 2.37966
- 15062 items above graph maximum of 1
- 1152845 items have value -99999 (Not computed)
|
Instance 1 : First repeat assessment visit (2012-13)
19,972 participants, 158,811 items
| Maximum | 8 |
| Decile 9 | -4 |
| Decile 8 | -5 |
| Decile 7 | -6 |
| Decile 6 | -6.333 |
| Median | -7 |
| Decile 4 | -7.143 |
| Decile 3 | -8 |
| Decile 2 | -8.333 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -6.61759
- Std.dev = 2.2928
- 1629 items above graph maximum of 1
- 139439 items have value -99999 (Not computed)
|
Instance 2 : Imaging visit (2014+)
62,990 participants, 500,078 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -4.5 |
| Median | -5 |
| Decile 4 | -5.66667 |
| Decile 3 | -6 |
| Decile 2 | -6.8 |
| Decile 1 | -7.6 |
| Minimum | -12 |
|
|
- Mean = -4.75715
- Std.dev = 2.5914
- 7183 items above graph maximum of 3.6
- 439476 items have value -99999 (Not computed)
|
Instance 3 : First repeat imaging visit (2019+)
5,292 participants, 42,000 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -4.28571 |
| Median | -5 |
| Decile 4 | -5.33333 |
| Decile 3 | -6 |
| Decile 2 | -6.5 |
| Decile 1 | -7.14286 |
| Minimum | -12 |
|
|
- Mean = -4.61569
- Std.dev = 2.3987
- 450 items above graph maximum of 3.14286
- 36904 items have value -99999 (Not computed)
|
Notes
This is the mean signal-to-noise ratio for rounds 8 onwards (right ear). The triplets played in rounds 1-5 represent the 'hunting phase' where the SNR change is 2 levels (equivalent to 4 dB) harder following a correct response and 2 levels easier following a wrong response, as opposed to a change of 1 level (2 dB) in rounds 8 to 15. Value is stored as -99999 for rounds 1-7.
Coding 7667 defines 1 special value:
- -99999 represents "Not computed"
