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SUMMARY:Using the Ekman 60 Faces Test to Detect Emotion Recognition Defici
 t in Brain Injury Patients - Luning Sun
DTSTART:20141021T150000Z
DTEND:20141021T160000Z
UID:TALK55590@talks.cam.ac.uk
CONTACT:Chan Yin Wah Fiona
DESCRIPTION:It is well documented that brain injury patients suffer from i
 mpaired emotion recognition. As one of the most widely used measurement to
 ols\, the Ekman 60 Faces test assesses the ability to recognise emotion vi
 a forced-choice labelling of facial expressions with one of six basic emot
 ions: happiness\, sadness\, surprise\, fear\, disgust and anger. The admin
 istration of the test on brain injury patients is psychometrically problem
 atic in terms of scoring accuracy\, measurement invariance and assessment 
 efficiency. The work presented in this talk aims to evaluate the psychomet
 ric properties of the Ekman 60 Faces Test and applies modern psychometric 
 techniques to improve its accuracy and efficiency.\n \nThis work benefits 
 from drawing on a large database of 194 brain injury patients\, which is v
 ery rare in clinical research. Both classical statistical analysis and mod
 ern psychometric methods are applied to the detection of emotion recogniti
 on deficit in brain injury patients in contrast to a non-afflicted control
  group. Confirmatory Factor Analysis reveals that a bi-factor model exhibi
 ts the best model fit. It specifies a general factor of emotion recognitio
 n and six specific factors corresponding to specific emotion recognition. 
 Factor scores\, which take into consideration the differential difficulty 
 levels of the items\, are suggested as indicators of the underlying abilit
 ies. Item Response Theory analysis is then performed on the individual sca
 les\, and measurement invariance is further evaluated. After removing cons
 traints on items that display bias\, (partial) scalar invariance is establ
 ished for specific emotion recognition scales. Finally\, two distinctive a
 pproaches are employed to achieve brief measurement. First\, a short form 
 of the original test is developed with four items per scale balanced for t
 he gender of the expressive face. Second\, an adaptive testing procedure i
 s simulated in order to explore the application of adaptive testing techni
 ques to neuropsychological assessment\, which has the potential to signifi
 cantly shorten the administration while maintaining comparable level of ac
 curacy and precision to the full-length scale.
LOCATION:2nd Floor Seminar Room\, Department of Psychology\, Downing Site\
 , Cambridge
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