| Level | Item |
| Ref No | BPS/004/1/06/01/171 |
| Title | Tests for Night Vision. |
| Date | 19 January 1942 |
| Extent | 1 item |
| Description | Report titled 'Tests for Night Vision.' (no. 7) by Philip E. Vernon.
The report explains the use of adaptometers to measure the threshold of perception at low illuminations. One of such is the Cheshire's Admiralty Adaptometer, a schematic of which is hand drawn in the report. Other tests of night vision include the Livingstone's R.A.F. Test and the Duke Elder-Craik Army Test, both of which measure vision at different levels of brightness. However, the report explains that each of these tests are rather unreliable and subject to chance-based answers. The tests assume that night vision is solely a factor of the physical characteristics of the eye. However, psychological factors such as neuroticism, or mere practice significantly impact night vision performance. As such, the tests measuring the phenomenon should be as complex as night vision itself. |
| Notes | The History of Psychology Centre is committed to creating an inclusive environment for all our users. Be aware that our catalogue contains historic terminology relating to mental health which could be considered offensive. The terminology exists within the original record and has been retained to inform users on viewpoints at the time. It in no way reflects the attitudes of the cataloguers or the British Psychological Society. |
| AccessConditions | Registered Users by Appointment Only. |
| AccessStatus | Open |
| Location | O16 |
| Copyright | Subject to the condition of the original, copies may be supplied for private research use only on receipt of a signed undertaking to comply with current copyright legislation. Permission to make any published use of material from the collection must be sought in advance from the Head of the History of Psychology Centre and Archives and, where appropriate, from the copyright owner. Where possible, assistance will be given in identifying copyright owners, but responsibility for ensuring copyright clearance rests with the user of the material |
| Rules | Description compiled in line with the following: ISAD (G) General International Standard Archival Description MAD3 Third Edition 2000 |
| ArchNote | Compiled by Sophie O’Reilly BPS Archivist History of Psychology Centre. |