Data
3,524,443 items of data are available, covering 206,999 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 | -4.5 |
| Decile 7 | -5.2 |
| Decile 6 | -6 |
| Median | -6.33333 |
| Decile 4 | -7 |
| Decile 3 | -7.429 |
| Decile 2 | -8 |
| Decile 1 | -9 |
| Minimum | -12 |
|
|
- Mean = -6.11829
- Std.dev = 2.4992
- 16539 items above graph maximum of 3
- 1650759 items have value -99999 (Not computed)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
166,102 participants, 1,307,082 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 = -6.48067
- Std.dev = 2.36773
- 14703 items above graph maximum of 1
- 1153037 items have value -99999 (Not computed)
|
Instance 1 : First repeat assessment visit (2012-13)
19,963 participants, 158,734 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 = -6.61998
- Std.dev = 2.23405
- 1470 items above graph maximum of 1
- 139375 items have value -99999 (Not computed)
|
Instance 2 : Imaging visit (2014+)
46,959 participants, 372,738 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 | -7.5 |
| Minimum | -12 |
|
|
- Mean = -4.76227
- Std.dev = 2.54892
- 5150 items above graph maximum of 3.5
- 327529 items have value -99999 (Not computed)
|
Instance 3 : First repeat imaging visit (2019+)
4,411 participants, 35,130 items
| Maximum | 8 |
| Decile 9 | -2 |
| Decile 8 | -3 |
| Decile 7 | -4 |
| Decile 6 | -4.4 |
| Median | -5 |
| Decile 4 | -5.5 |
| Decile 3 | -6 |
| Decile 2 | -6.66667 |
| Decile 1 | -7.42857 |
| Minimum | -12 |
|
|
- Mean = -4.75611
- Std.dev = 2.38141
- 317 items above graph maximum of 3.42857
- 30818 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"
