Data
4,244,016 items of data are available, covering 232,871 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 |
| Decile 7 | -5 |
| Decile 6 | -6 |
| Median | -6 |
| Decile 4 | -7 |
| Decile 3 | -7.2 |
| Decile 2 | -8 |
| Decile 1 | -8.857 |
| Minimum | -12 |
|
|
- Mean = -5.94342
- Std.dev = 2.59462
- 26987 items above graph maximum of 2.857
- 1987242 items have value -99999 (Not computed)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
166,001 participants, 1,306,290 items
| Maximum | 8 |
| Decile 9 | -4 |
| Decile 8 | -5 |
| Decile 7 | -6 |
| Decile 6 | -6 |
| Median | -6.857 |
| Decile 4 | -7 |
| Decile 3 | -7.714 |
| Decile 2 | -8 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -6.48039
- Std.dev = 2.36784
- 14700 items above graph maximum of 1
- 1152339 items have value -99999 (Not computed)
|
Instance 1 : First repeat assessment visit (2012-13)
19,956 participants, 158,678 items
| Maximum | 8 |
| Decile 9 | -4 |
| Decile 8 | -5 |
| Decile 7 | -6 |
| Decile 6 | -6.333 |
| Median | -7 |
| Decile 4 | -7 |
| Decile 3 | -8 |
| Decile 2 | -8.286 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -6.62005
- Std.dev = 2.23408
- 1470 items above graph maximum of 1
- 139326 items have value -99999 (Not computed)
|
Instance 2 : Imaging visit (2014+)
87,242 participants, 692,658 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -4.8 |
| Median | -5 |
| Decile 4 | -6 |
| Decile 3 | -6.28571 |
| Decile 2 | -7 |
| Decile 1 | -8 |
| Minimum | -12 |
|
|
- Mean = -4.91319
- Std.dev = 2.69681
- 10711 items above graph maximum of 4
- 608561 items have value -99999 (Not computed)
|
Instance 3 : First repeat imaging visit (2019+)
12,470 participants, 99,148 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -5 |
| Median | -5.2 |
| Decile 4 | -6 |
| Decile 3 | -6.33333 |
| Decile 2 | -7 |
| Decile 1 | -8 |
| Minimum | -12 |
|
|
- Mean = -4.98314
- Std.dev = 2.77465
- 1663 items above graph maximum of 4
- 87016 items have value -99999 (Not computed)
|
Notes
This is the mean signal-to-noise ratio for rounds 8 onwards (left 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"
