HSP Research and Scientific Foundations 1 — Questions and Answers
Question 1: What is the purpose of a control group in experimental research?
- To recruit more participants
- To test more hypotheses
- To provide a baseline for comparison (Correct answer)
- To validate the dependent variable
Correct answer: To provide a baseline for comparison
In experimental research, a control group is a group of participants who do not receive the experimental treatment or intervention. Their data serves as a baseline against which the experimental group's results are compared. This allows researchers to determine if the intervention had a significant effect, isolating the impact of the independent variable from other factors.
Question 2: What type of research design allows for cause-and-effect conclusions?
- Case study
- Experimental design (Correct answer)
- Correlational study
- Qualitative analysis
Correct answer: Experimental design
Experimental design is the only research design that allows for cause-and-effect conclusions. This is because it involves the manipulation of an independent variable, random assignment of participants to control and experimental groups, and control over extraneous variables. These elements ensure that any observed changes in the dependent variable can be confidently attributed to the independent variable.
Question 3: Which statistical test is appropriate for comparing the means of two groups?
- Chi-square
- T-test (Correct answer)
- ANOVA
- Regression
Correct answer: T-test
A T-test is a statistical test specifically designed to compare the means of two groups. It determines if the observed difference between the two group means is statistically significant or likely due to chance. This makes it appropriate for scenarios where researchers want to assess if two distinct populations or conditions have different average outcomes.
Question 4: What is internal validity?
- Accuracy of measurement tools
- Generalizability of results
- Confidence in cause-effect relationships (Correct answer)
- Participant retention rate
Correct answer: Confidence in cause-effect relationships
Internal validity refers to the extent to which a study can confidently establish a cause-and-effect relationship between its variables. It addresses whether the observed effects are truly due to the independent variable and not to confounding factors. High internal validity means there are minimal alternative explanations for the study's findings.
Question 5: Which term refers to the consistency of a measurement tool?
- Reliability (Correct answer)
- Validity
- Bias
- Utility
Correct answer: Reliability
Reliability refers to the consistency and stability of a measurement tool or method. A reliable tool produces similar results under the same conditions when measurements are repeated. This ensures that the data collected is dependable and not subject to random error or fluctuation.
Question 6: What is a common purpose of conducting a literature review?
- Prove hypotheses are correct
- Avoid new ideas
- Summarize existing knowledge and identify gaps (Correct answer)
- Replace statistical analysis
Correct answer: Summarize existing knowledge and identify gaps
A literature review serves to synthesize and critically evaluate existing knowledge on a particular topic. Its primary purpose is to summarize what is already known, identify gaps in current research, and highlight areas that require further investigation. This process helps to establish the context for new research and justify its necessity.
HSP Research and Scientific Foundations 1
What is the purpose of a control group in experimental research?