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There are five basic research strategies for investigating variables and their relationships: experimental, nonexperimental, quasi- experimental, correlational, and descriptive. These approaches differ not just in terms of what the experimenter does but, more fundamentally, in what they demonstrate Identify the function of each of these strategies by completing the following statements. research identifies only whether a relationship exists between variables relationship exists between variables and, if one does, describes the pattern and strength of the relationship. whether a causal relationship exists between variables. research identifies whether a research identifies