PSYC 2020 Lecture Notes - Lecture 12: Human Resources Development Canada, Longitudinal Study
PSYC 2020 Lecture 12 Notes
Introduction
Sequential design
• A third kind of developmental comparison—the sequential design—tries to do just that.
• The Sequential Design Sequential designs combine the best features of cross-sectional
and longitudinal studies by selecting participants of different ages and following each of
these cohorts over time.
• To illustrate, imagine that we wished to study the deelopet of childre’s logical
reasoning abilities between the ages of 6 and 12.
• We might begin in 2012 by testing the logical reasoning of a sample of 6-year-olds (the
2006 birth cohort) and a sample of 8-year-olds (the 2004 birth cohort).
• We could then retest the reasoning abilities of both groups in 2014 and 2016.
• Notice that the design calls for us to follow the 2006 cohort from ages 6 through 10 and
the 2004 cohort from ages 8 through 12.
• A graphic representation of this research plan appears
• A major Canadian sequential study, called the National Longitudinal Survey of Children
and Youth (NLSCY), has been collecting data on approximately 20 000 children since
1994.
• An initial cohort of about 15 000 children, aged 0–11 in 1994, is being followed every
two years to age 25.
• Younger children are being added to the sample as the initial cohort ages.
• This younger cohort, which will eventually number over 20 000 children, will be
followed through the transition into elementary school (Statistics Canada, 2003c).
• This survey is a joint project funded through Human Resources Development Canada
and Statistics Canada.
• There are three major strengths of this sequential design.
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