Examlex
Papers that are published in scientific journals are examples of ______ sources.
Case Study
An in-depth analysis of a single subject, group, event, or community, used to explore causal relationships in complex contexts.
Conjoined Twins
Twins that are physically attached to each other at birth, due to the incomplete splitting of the developing embryo.
Experiment
A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact by controlled observation or manipulation of variables.
American Psychological Association
A prominent organization that represents psychologists in the United States, setting professional standards and promoting psychological research.
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