Which description best matches a descriptive study with limited control over variables?

Which description best matches a descriptive study with limited control over variables?

• A. Non-experimental research
• B. Experimental study
• C. Quasi-experimental
• D. Case study

Answer: (A)

Non-experimental research is about describing phenomena as they occur without manipulating variables. A descriptive study with limited control fits this because there is no intentional intervention or random assignment, and the focus is on observing and recording variables to describe patterns or relationships rather than proving causation. Data typically come from surveys, naturalistic observation, or existing records, and while you may detect associations, you can’t confidently infer cause and effect due to uncontrolled extraneous factors. By contrast, an experimental study involves manipulating an independent variable with random assignment to conditions to test causality. A quasi-experimental study includes some manipulation but lacks full randomization, so control is weaker and causal conclusions are more tentative. A case study centers on an in-depth look at a single case or small number of cases, emphasizing rich description and context rather than broad generalization or causal testing.

Non-experimental research is about describing phenomena as they occur without manipulating variables. A descriptive study with limited control fits this because there is no intentional intervention or random assignment, and the focus is on observing and recording variables to describe patterns or relationships rather than proving causation. Data typically come from surveys, naturalistic observation, or existing records, and while you may detect associations, you can’t confidently infer cause and effect due to uncontrolled extraneous factors.

By contrast, an experimental study involves manipulating an independent variable with random assignment to conditions to test causality. A quasi-experimental study includes some manipulation but lacks full randomization, so control is weaker and causal conclusions are more tentative. A case study centers on an in-depth look at a single case or small number of cases, emphasizing rich description and context rather than broad generalization or causal testing.