Table 5. Protocol for BRIGHT-Kids.

Summary of abbreviations; fNIRS, functional near infrared spectroscopy; EEG/ERP, electroencephalography/event related potentials; L – length, W – weight, H – height, HC – head circumference, MUAC – mid to upper arm circumference, KHL – knee to heel length. * Indicates a new measure introduced for BRIGHT-Kids.

Measure
Neuroimaging measures	Questionnaires/Interviews – Infant/Child
fNIRS: Social/Non-social	Food Insecurity Q (FFQ) *
fNIRS: Habituation and Novelty Detection	Dietary Diversity Q (IFQ) *
fNIRS: Functional connectivity	Early Childhood Development Index *
EEG: Auditory Oddball	Questionnaires/Interviews – Family
Behavioural/Neurocognitive measures	Generalised Anxiety Disorder – Maternal *
Eye-tracking: Cognitive control	Patient Health Questionnaire – Maternal *
Eye-tracking: Gap/Overlap	Perceived Stress Scale (PSS) – Maternal
Eye-tracking: Non-social contingency	Impact of COVID-19 *
Eye-tracking: Face popout	Family Care Indicators (FCI)
Eye-tracking: Dynamic scenes	Clinical measures/ Medical details
Eye-tracking: Word-picture-matching	Anthropometric measures – infant (L,W,HC,MUAC, KHL)
Mullen Scales of Early Learning (MSEL)
Tablet-based Early Years toolbox *
Test of Gross Motor Development *