Data
3,949,900 items of data are available, covering 223,729 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 | -6.286 |
| Decile 4 | -7 |
| Decile 3 | -7.333 |
| Decile 2 | -8 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -5.99979
- Std.dev = 2.55816
- 20786 items above graph maximum of 3
- 1849748 items have value -99999 (Not computed)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
166,066 participants, 1,306,794 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 = -6.48053
- Std.dev = 2.36776
- 14702 items above graph maximum of 1
- 1152785 items have value -99999 (Not computed)
|
Instance 1 : First repeat assessment visit (2012-13)
19,961 participants, 158,718 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 = 2.23412
- 1470 items above graph maximum of 1
- 139361 items have value -99999 (Not computed)
|
Instance 2 : Imaging visit (2014+)
73,083 participants, 580,145 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -4.66667 |
| Median | -5 |
| Decile 4 | -6 |
| Decile 3 | -6 |
| Decile 2 | -7 |
| Decile 1 | -8 |
| Minimum | -12 |
|
|
- Mean = -4.86303
- Std.dev = 2.65475
- 8583 items above graph maximum of 4
- 509792 items have value -99999 (Not computed)
|
Instance 3 : First repeat imaging visit (2019+)
6,844 participants, 54,495 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -4.5 |
| Median | -5 |
| Decile 4 | -5.6 |
| Decile 3 | -6 |
| Decile 2 | -6.8 |
| Decile 1 | -7.5 |
| Minimum | -12 |
|
|
- Mean = -4.76678
- Std.dev = 2.50132
- 657 items above graph maximum of 3.5
- 47810 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"
