When Rowena was born, her parents agreed to allow her to participate in a research project that investigates the development of motor skills in children. Every year, Rowena's parents complete a survey answering questions about how Rowena's motor skills have changed. Rowena and her parents are participating in a study that uses a .

longitudinal design

Explanation:

When Rowena was born, her parents agreed to allow her to participate in a research project that investigates the development of motor skills in children. Every year, Rowena's parents complete a survey answering questions about how Rowena's motor skills have changed. Rowena and her parents are participating in a study that uses a longitudinal design.

Longitudinal Design

Explanation:

A longitudinal study is an observational research design approach in which repeated observations of same variables and data are collected repeatedly over a period of time for the same subjects.Longitudinal research can span years or even decades.

Rowena parents are participating in a research project that investigates the development of motor skills in children. Every year, they complete a survey answering questions about how Rowena's motor skills have changed. This shows Rowena and her parents are participating in a study that uses a LONGITUDINAL DESIGN research approach. The take note of their observations for periods of times(years).

A longitudinal research is most often an prolonged case study, studying persons over long periods of time, and is a strictly qualitative activity.

answer; elasticity of the lungs decreases;

answer; no longer than a reasonable period of time;