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This study examined whether eye\u2010tracking during infancy can be used to detect differences in attentional development related to infant feeding practices in a generally well\u2010nourished population. Specifically, using data from the YOUth Baby &amp; Child cohort (\n                    <jats:italic>N<\/jats:italic>\n                    \u00a0=\u00a02647) collected in Utrecht, the Netherlands, infant attentional disengagement was assessed around 5\u00a0months (4\u20136\u00a0months) and around 10\u00a0months (9\u201311\u00a0months) of age, alongside child receptive vocabulary around 3\u00a0years (2\u20134\u00a0years) and around 6\u00a0years (5\u20137\u00a0years) of age. While a positive association was established between breastfeeding duration and receptive vocabulary around 6\u00a0years of age, no association was established between breastfeeding duration and attentional disengagement at either timepoint. These findings suggest that effects of early\u2010life nutrition on cognitive development in well\u2010nourished infants do not extend to early attentional development or are too subtle to be picked up using eye\u2010tracking. Future research could explore populations with greater developmental variability.\n                  <\/jats:p>","DOI":"10.1111\/infa.70120","type":"journal-article","created":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T06:11:53Z","timestamp":1787206313000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Association Between Breastfeeding Duration and Attentional and Cognitive Development in Infancy and Early Childhood"],"prefix":"10.1111","volume":"31","author":[{"given":"Feline A.","family":"van Gelderen","sequence":"first","affiliation":[{"name":"Danone Research &amp; Innovation  Utrecht the Netherlands"},{"name":"Experimental Psychology Helmholtz Institute, Utrecht University  Utrecht the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roy S.","family":"Hessels","sequence":"additional","affiliation":[{"name":"Experimental Psychology Helmholtz Institute, Utrecht University  Utrecht the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kelly A.","family":"Mulder","sequence":"additional","affiliation":[{"name":"Danone Research &amp; Innovation  Utrecht the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9095-4400","authenticated-orcid":false,"given":"Lidewij","family":"Schipper","sequence":"additional","affiliation":[{"name":"Danone Research &amp; Innovation  Utrecht the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,19]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.3758\/BF03206029"},{"key":"e_1_2_10_3_1","volume-title":"The Bayley Scales of Infant and Toddler Development","author":"Bayley N.","year":"2006"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamapediatrics.2013.455"},{"key":"e_1_2_10_5_1","first-page":"496","volume-title":"Labour Economics, European Association of Labour Economists 23rd Annual Conference, Paphos, Cyprus, 22\u201024th September 2011","author":"Borra C.","year":"2012"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1440\u20101754.2012.02547.x"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.psych.53.100901.135233"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1163\/156856897x00357"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamanetworkopen.2021.3687"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.106.6.1355"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.3389\/fpsyg.2020.589096"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.3390\/pediatric16030061"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022\u20100965(77)90044\u20103"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.psych.52.1.337"},{"key":"e_1_2_10_15_1","doi-asserted-by":"publisher","DOI":"10.1203\/PDR.0b013e31822a59f5"},{"key":"e_1_2_10_16_1","doi-asserted-by":"publisher","DOI":"10.3945\/ajcn.112.040766"},{"key":"e_1_2_10_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/infa.12185"},{"key":"e_1_2_10_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/infa.12441"},{"key":"e_1_2_10_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuroimage.2017.12.056"},{"key":"e_1_2_10_20_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00221\u2010025\u201007177\u20107"},{"key":"e_1_2_10_21_1","doi-asserted-by":"publisher","DOI":"10.1111\/desc.12961"},{"key":"e_1_2_10_22_1","unstructured":"Dunn L. 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