MCS – 9 months – Developmental Milestones

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The Millennium Cohort Study (MCS) assessed their cohort members (CMs) during the study’s sweep at 9 months age using the Developmental Milestones measures.

Details on these measures and the data collected from the CMs are outlined in the table below.


Domain:Fine and gross motor coordination
Receptive and productive vocabulary
Measures:Developmental milestones using questions from two developmental questionnaires:
8 questions from Denver Developmental Screening Test (DDST) which screens for potential developmental problems
5 items were chosen from a UK adaptation of MacArthur Communicative Development Inventories (CDI) identifies early communicative gestures
CHC:N/A
Administrative method:Parent report; face to face interview
Procedure:Parents were asked to respond to selected statements from the tests, using a three point scale Often/once or twice/not yet for the Denver Developmental Screening Test, and Often/sometimes/not yet for the MacArthur CDI.
Link to questionnaire:https://cls.ucl.ac.uk/wp-content/uploads/2017/07/MCS1_CAPI_Questionnaire_Documentation_March_2006_v1.1.pdf (opens in new tab)
Scoring:None available
Item-level variable(s):achand00 acgrab00 acpick00 acptoy00 (DDST - fine)
acsitu00 acstan00 acwalk00 (DDST - gross)
acsmil00 acgive00 acwave00 acarms00 acnods00 (CDI)
Total score/derived variable(s):None
Age of participant (days):Mean = 295.5, SD 15.25, Range = 243-382
Descriptives:None available
Other sweep and/or cohort:None
Source:Frankenburg, W. K., & Dodds, J. B. (1967). The Denver developmental screening test. The Journal of Pediatrics, 71(2), 181-191.
Fenson L., Dale P., Resnick J., Thal D., Bates E., Hartung J. P. et al. (1993). MacArthur Communicative Inventories. Singular Publishing Group, San Diego.
Technical resources:Johnson, J., Atkinson, M., &
Rosenberg, R. (2015). Guide to psychological, developmental and health inventories in the MCS. London: Centre for Longitudinal Studies.
Reference examples:Sacker, A., Quigley, M. A., & Kelly, Y. J. (2006). Breastfeeding and developmental delay: findings from the millennium cohort study. Pediatrics, 118(3), e682-e689.

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This page is part of CLOSER’s ‘A guide to the cognitive measures in five British birth cohort studies’.