Neuroscience
Problems recognising faces, brought on by brain injury, could be more prevalent than previously thought. That’s according to Tim Valentine and colleagues who argue there’s been an over-reliance on ‘pure’ cases, and that “it is easy to dismiss a problem with face recognition as uninteresting if it is ‘just’ part of a generalised memory impairment, or ‘secondary’ to poor attention and concentration”.
Valentine’s team recruited 91 patients who had suffered brain injury either through an accident, a stroke or illness, and asked them to complete a raft of face recognition tests and general mental performance tests.
They found 50 per cent of the patients thought they would have trouble recognising people they had met only a few times. And 77 per cent scored significantly worse than the healthy population average when this ability was tested. This was done by presenting them with a large number of unfamiliar faces from which they had to distinguish those that had been shown to them once already from those that were entirely new.
On an easier version of the test that involved fewer faces, or more chances to view some faces, 20 per cent of the patients performed particularly poorly. Those patients who had difficulty learning to recognise new faces also often had general visual processing deficits, and general problems with recognition memory.
The researchers also noted how much variation there was in the sensitivity of the different face-recognition tests they used. “The likelihood of detecting a face recognition impairment in someone with brain injury therefore clearly depends on the particular test which is used” they said, before suggesting possible interventions for affected patients such as “verbally encoding particular facial features” and “using caricatures to accentuate structural properties of to-be-learned faces”.
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Valentine, T., Powell, J., Davidoff, J., Letson, S. & Greenwood, R. (2006). Prevalence and correlates of face recognition impairments after acquired brain injury. Neuropsychological Rehabilitation, 16, 272-297.
Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
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Neuroscience
Face-recognition problems more common than previously thought
Problems recognising faces, brought on by brain injury, could be more prevalent than previously thought. That’s according to Tim Valentine and colleagues who argue there’s been an over-reliance on ‘pure’ cases, and that “it is easy to dismiss a problem with face recognition as uninteresting if it is ‘just’ part of a generalised memory impairment, or ‘secondary’ to poor attention and concentration”.Valentine’s team recruited 91 patients who had suffered brain injury either through an accident, a stroke or illness, and asked them to complete a raft of face recognition tests and general mental performance tests.
They found 50 per cent of the patients thought they would have trouble recognising people they had met only a few times. And 77 per cent scored significantly worse than the healthy population average when this ability was tested. This was done by presenting them with a large number of unfamiliar faces from which they had to distinguish those that had been shown to them once already from those that were entirely new.
On an easier version of the test that involved fewer faces, or more chances to view some faces, 20 per cent of the patients performed particularly poorly. Those patients who had difficulty learning to recognise new faces also often had general visual processing deficits, and general problems with recognition memory.
The researchers also noted how much variation there was in the sensitivity of the different face-recognition tests they used. “The likelihood of detecting a face recognition impairment in someone with brain injury therefore clearly depends on the particular test which is used” they said, before suggesting possible interventions for affected patients such as “verbally encoding particular facial features” and “using caricatures to accentuate structural properties of to-be-learned faces”.
_________________________________
Valentine, T., Powell, J., Davidoff, J., Letson, S. & Greenwood, R. (2006). Prevalence and correlates of face recognition impairments after acquired brain injury. Neuropsychological Rehabilitation, 16, 272-297.
Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
- New Genetic Evidence Suggests Face Recognition Is A Very Special Human Skill
Example stimuli from Shakeshift and Plomin, 2015.A new twin study, published today in PNAS, of the genetic influences on face recognition ability, supports the idea that face recognition is a special skill that's evolved quite separately from other...
- Biting On Pen Impairs People's Emotion Recognition
Have you ever noticed how, when two people are talking, they seem to mimic each other's facial expressions? Some psychologists say this is simply a case of emotions being contagious. However, others go further, arguing this mimicry plays a functional...
- Cryptic Crosswords Impair Face Recognition
Solving cryptic crosswords impairs our subsequent ability to recognise faces, a finding that has obvious practical implications for the kind of activities eye-witnesses get up to prior to an identity parade. Michael Lewis at Cardiff University presented...
- Why Moving Faces Are Easier To Recognise
Psychologists have previously shown that moving faces are easier to recognise than a static image of a face. Karen Lander and Lewis Chuang at the University of Manchester sought to find out why. In a first experiment, 48 psychology students viewed degraded...
- Neuropsychology Abstract Of The Day: Visuocognition
The Cambridge Car Memory Test: A task matched in format to the Cambridge Face Memory Test, with norms, reliability, sex differences, dissociations from face memory, and expertise effects Behav Res Methods. 2011 Oct 20; Dennett HW, McKone E, Tavashmi R,...