Cross-sectional research studies gather data from many people who are of the same age and compare them to others who are at a different age and thus a different level of development. the name for a group of people who are the same age and thus were raised during the same time period is a/an

The answer is "cohort – same age, and same time period".

A cohort effect refers to a change which describes populaces born at a specific point in time, however which is free of the way toward maturing. A period impact is a change which happens at a specific time, influencing all age gatherings and cohorts consistently.