 This type of design pales in comparison to longitudinal design whose topic of investigation is developmental in nature.This is because cross-sectional studies collect data at or around the same time from multiple individuals of different ages of interest, instead of collecting data over multiple time points for each individual in the study, which would allow the researcher to compare change for individuals over time, as well as differences between individuals.Another research consideration in the field is why certain ethnic and racial groups are looking towards their own expanding community for mates instead of continuing interracial marriages.