When a researcher repeats an original study as closely as they can to test whether the effect is the same in the newly collected data, this is what type of replication? select one: a. file draw problem b. replication-plus-extension c. direct replication d. conceptual replication

d. conceptual replication

Explanation:

Conceptual replication means that researchers re-test the same theoretical idea or hypothesis repeatedly, but use different populations, different ways of manipulating variables, different ways of measuring variables, or using different study designs.

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no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.