: Data-Field 7672

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Data

1,683,143 items of data are available, covering 49,721 participants.
Defined-instances run from 2 to 3, labelled using Instancing 2.
Array indices run from 0 to 44.

Average length is 13.2 characters, longest is 167.

2 Instances

Instance 2 : Imaging visit (2014+)
35,669 participants, 1,188,005 items
Too few values for statistical summary.

Instance 3 : First repeat imaging visit (2019+)
14,848 participants, 495,138 items
Too few values for statistical summary.

Notes

This is an audit trail of the keys pressed by a participant at each round of the trial. It records what was pressed and when it was pressed. To illustrate

3201,C,4328,K,5531,#

indicates that

At 3201ms (after seeing the image) the participant selected the letter "C";
at 4328ms the participant changed their mind and selected the latter "K";
at 5531ms the participant pressed the Next key ("#").

1 Related Data-Field

Field ID	Description	Relationship
7671	Letter selected by participant	Field 7671 is the final entry in Current Field

3 Resources

Preview	Name	Res ID
	Initial challenge screen	3012
	Instructions for broken letters test	10261
	Intermediate challenge screen	3013

1 Publication

Pub ID	Title	Author(s)	Year	Journal
11839	The Graded Incomplete Letters Test (GILT): a rapid test to detect cortical visual loss, with UK Biobank implementation	KXX Yong (+8)	2024	Behavior Research Methods

Enabling scientific discoveries that improve human health