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Eye-tracking-based assessment of cognitive function in low-resource settings
  1. Linda Forssman1,
  2. Per Ashorn1,2,
  3. Ulla Ashorn1,
  4. Kenneth Maleta3,
  5. Andrew Matchado3,
  6. Emma Kortekangas1,
  7. Jukka M Leppänen1
  1. 1Tampere Center for Child Health Research, School of Medicine, University of Tampere, Tampere, Finland
  2. 2Department of Paediatrics, Tampere University Hospital, Tampere, Finland
  3. 3School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
  1. Correspondence to Dr Jukka M Leppänen, Infant Cognition Laboratory, Tampere Center for Child Health Research, School of Medicine, University of Tampere, Tampere FIN-33014, Finland; jukka.leppanen{at}uta.fi

Abstract

Background Early development of neurocognitive functions in infants can be compromised by poverty, malnutrition and lack of adequate stimulation. Optimal management of neurodevelopmental problems in infants requires assessment tools that can be used early in life, and are objective and applicable across economic, cultural and educational settings.

Objective and design The present study examined the feasibility of infrared eye tracking as a novel and highly automated technique for assessing visual-orienting and sequence-learning abilities as well as attention to facial expressions in young (9-month-old) infants. Techniques piloted in a high-resource laboratory setting in Finland (N=39) were subsequently field-tested in a community health centre in rural Malawi (N=40).

Results Parents' perception of the acceptability of the method (Finland 95%, Malawi 92%) and percentages of infants completing the whole eye-tracking test (Finland 95%, Malawi 90%) were high, and percentages of valid test trials (Finland 69–85%, Malawi 68–73%) satisfactory at both sites. Test completion rates were slightly higher for eye tracking (90%) than traditional observational tests (87%) in Malawi. The predicted response pattern indicative of specific cognitive function was replicated in Malawi, but Malawian infants exhibited lower response rates and slower processing speed across tasks.

Conclusions High test completion rates and the replication of the predicted test patterns in a novel environment in Malawi support the feasibility of eye tracking as a technique for assessing infant development in low-resource setting. Further research is needed to the test–retest stability and predictive validity of the eye-tracking scores in low-income settings.

  • infant
  • Neurodevelopment
  • cognition

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