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To investigate whether nutrition plays a role in inhibitory control and executive functioning early in life, we collected data on behavior using different tasks (see previous blog). To perform these tasks, we choose to visit the children at home with the aim 1) to burden the families less, and 2) to test the children in their home environments where they are probably more at ease. Testing 3-year-old children is very fun a

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nd can also be challenging at the same time. I will share some anecdotes and experiences of my data collection as inspiration for others testing young children.

Attention
Some tasks had lengthy instructions and required the child to perform several practice trials, resulting in the child losing his/her attention. The sequence of the tasks was constructed in such a way that the child’s attention was maintained as long as possible. For example, the tasks that required more attention, focus and instructions were performed first.

Sometimes children said to be not in the mood to play anymore, or that they didn’t know what to do despite passing the practice trials. Repeating the rules is not possible, because it means that some children will receive more instructions than other children. I solved this problem by telling the child that he/she would be rewarded if he/she finished the task. Rewards could be a fun game they can play next, or some snacks that the parents agreed to giving.

Parents
Parents sometimes tended to help their child. To prevent this, it is very important to instruct the parents not to help their child. Another way to prevent the parent from helping is to keep them busy by having them fill in a questionnaire, or to turn to the child and say things like: “are you a bit nervous because Mum is looking?” Sentences as these work very well, as you are not telling the parent directly what to do, but they understand the hint immediately.

Siblings
Toddlers often have siblings; sometimes younger siblings and sometimes older siblings. If possible, parents are asked to arrange the situation this way that the siblings are not at home and/or are asleep. When not possible, an assistant accompanying the experimenter can take care of the siblings, for example by taking the sibling outside and play soccer in the neighborhood. Everything for science!

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About the author

Yvonne Willemsen MSc does her PhD research at the Psychobiology lab, within the Developmental Psychology department of Radboud University in Nijmegen (the Netherlands). She is specialized in molecular nutrition and her main interest lies in nutrition and child health, especially the molecular mechanisms behind the associations between nutrition and gut microbiota.

About Yvonne Willemsen, MSc

Yvonne Willemsen MSc does her PhD research at the Psychobiology lab, within the Developmental Psychology department of Radboud University in Nijmegen (the Netherlands). She is specialized in molecular nutrition and her main interest lies in nutrition and child health, especially the molecular mechanisms behind the associations between nutrition and gut microbiota.


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