designs can overcome some of the limitations of traditional developmental designs. By comparing participants of the same age who were born in different years, investigators can find out if cohort effects are operating. This design blends two other developmental research models into one comprehensive model.

Sequential designs

Explanation:

Sequential designs is a design used by researchers to overcome some of the limitations of traditional developmental designs under research design which helps to uncover cohort effects, thereby helping to explain diversity in development. Researchers conduct other research design, cross-sectional or longitudinal studies, even sometimes combining longitudinal and cross-sectional strategies techniques to examine how age, cohort, gender, and social class impact development. Longitudinal research designs are used to examine behavior in the same individuals over time and cross-sectional research designs are used to examine behavior in participants of different ages who are tested at the same point in time. Sequential designs combine both longitudinal cross-sectional research designs. This research design finds out whether cohort effects are operating by comparing participants of the same age who were born in different years which allows for the examination of cohort and time of measurement effects.

the first one is d and the second a

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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    -sprinkles