Homework Help: Questions and Answers: What distinguishes experimental research from other research designs?
a) The use of qualitative data
b) The manipulation of variables to establish cause and effect
c) The emphasis on historical context
d) The reliance on cross-sectional data
Answer:
First, let’s understand the key characteristics of experimental research Experimental research is characterized by:
- Manipulation of one or more independent variables
- Control of other variables
- Random assignment of subjects to groups
- Measurement of the effect on dependent variables
To solve this question, we need to identify the key characteristic that distinguishes experimental research from other research designs. Let’s analyze each option:
Given Options: Step by Step Answering
a) The use of qualitative data
- While qualitative data can be used in experimental research, it is not exclusive to it. Qualitative research is more commonly associated with observational or descriptive studies.
b) The manipulation of variables to establish cause and effect
- This is a fundamental aspect of experimental research. Experimental research involves manipulating one or more independent variables to determine their effect on a dependent variable, thereby establishing a cause-and-effect relationship.
c) The emphasis on historical context
- This is more characteristic of historical research designs, which focus on understanding phenomena in their historical setting rather than manipulating variables.
d) The reliance on cross-sectional data
- Cross-sectional data is typically used in observational studies to assess a phenomenon at a single point in time, rather than in experimental research.
Final Answer
Based on the above analysis, the correct answer is:
b) The manipulation of variables to establish cause and effect.
This is the hallmark of experimental research, allowing researchers to isolate and test the impact of specific variables on outcomes, which is crucial for establishing causal relationships.
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