Pilot study Longitudinal measured infant motor development

Pilot Longitudinal Study

The pilot longitudinal study is concerned with the motor development of a cohort of children measured several times, enabling us to explore the shape of developmental profiles when gross motor development is measured every two months in healthy, full-term infants from the age of six weeks until the child is able to walk independently. With these gross motor trajectories it might be possible to make profiles  in which we can early recognize typical and atypical motor development . This study also includes the feasibility for parents to continue filming regularly and to find out how to support them best.


What are we doing?
The Institutional Review Board of the University Medical Centre Utrecht has approved the study. The pilot started in November 2014 and included 57 children. Parents were asked to film their child every two months according to the AIMS home-video method. Parents film their child according to instructions and they can upload the video in a webportal. This is a secure digital environment to store the video material. The researchers assess the films with the AIMS and sent feedback to parents on the motor development of their child.

One cohort of children started filming at the age of six weeks and 3.5, 5.5, 7.5 and 9.5 months. The second cohort started filming at the age of 8.5 month and 10.5, 12.5, 14.5 and 16.5 months. By splitting the group, we can cover the total age range of the AIMS in a relatively short time frame. At the beginning and end, parents fill out a short questionnaire concerning their expectations and experiences with filming their child several times.


Inclusion: healthy, full-term children; informed consent of both parents; sufficient understanding of the Dutch language to understand the instructions.

Exclusion: children with (diagnosed) abnormal or atypical motor behaviour.

This study finished in 2015.


The Pilot Longitudinal trajectories team consists of the following persons:

  1. Jacqueline Nuysink PhD, principal investigator GODIVA
  2. Imke van Maren-Suir MSc, researcher
  3. Marike Boonzaaijer MSc, researcher
  4. Petra Nijmolen MSc, researcher
  5. Students of the master programme in Pediatric physiotherapy

Advisory panel:

  1. Anjo Janssen, senior researcher, Radboud UMC
  2. Cas Kruitwagen MSc, statistician Julius center UU