Variable--as there are too many testing variables within the research. Though they are all the same age (relatively) the participants are from different regions therefore different cultures and potentially differing races and ethnicities. Additionally, differing socioeconomic statuses will reveal varying parental and cultural attitudes which could impact self-confidence. SES also in itself can impact self-confidence as money can provide a future where poverty may create limits especially for an adolescent looking toward college or work goals beyond secondary education. <span />
I believe the answer is: <span>longitudinal; cross-sectional
Longitudinal study is initiated if the researchers want to collect long term data from the subject as over time (as they grow up).
Cross-sectional study on the other hand is initiated if the researchers want to know whether a certain things only affect a specific population.
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Answer:
Seminole dugout canoes are made from cypress trees. Your Welcome!