A. Time Series Design
B. Static-Group Comparison Design
C. Solomon Four-Group Design
D. One-Shot Case Study
E. One-Group Pretest-Posttest Design
Choose the correct answer from the options given below:
Experimental Designs: Ranking Internal Validity Control
Internal validity is crucial for establishing a cause-and-effect relationship. It measures whether the independent variable truly caused the observed effect or if other factors interfered. Different experimental designs offer varying levels of protection against these confounding factors, known as threats to internal validity.
Validity Control Levels in Designs
Designs are assessed based on their ability to minimize threats like history, maturation, testing effects, instrumentation, statistical regression, selection bias, mortality, and ambiguous temporal precedence.
- C. Solomon Four-Group Design: This design offers the highest control. It includes control groups and manipulation of pretesting, allowing researchers to identify and control for testing effects and interactions between testing and treatment.
- A. Time Series Design: With multiple pre-intervention and post-intervention measurements, this design helps establish trends and control for maturation and some history effects by observing patterns over time. However, unique events coinciding with the intervention (history effects) can still pose a threat.
- B. Static-Group Comparison Design: This design uses distinct, non-randomly assigned groups (one receiving the treatment, one not). While it includes a comparison group, the lack of random assignment makes it vulnerable to selection bias, as pre-existing differences between groups might explain the outcomes.
- E. One-Group Pretest-Posttest Design: This design measures a single group before and after an intervention. It offers weak control because it lacks a comparison group, making it susceptible to threats like history, maturation, and testing effects, as there's no baseline to isolate the intervention's impact.
- D. One-Shot Case Study: This is the weakest design. It involves administering a treatment and measuring the outcome once, without a pretest or a control group. It provides minimal control, making it difficult to attribute any observed changes solely to the intervention.
Order: Highest to Lowest Control
Based on the strengths in controlling internal validity threats, the designs ordered from highest control to lowest are:
- C. Solomon Four-Group Design
- A. Time Series Design
- B. Static-Group Comparison Design
- E. One-Group Pretest-Posttest Design
- D. One-Shot Case Study
This sequence represents the order: C, A, B, E, D.
Important Questions from Research methodology - Teaching
- Scientific approach to research___
- Arrange the steps in research process in sequential order:
A. Collection and analysis of data
B. Interpretation and report
C. Review concepts and theories
D. Define research problem
E. Formulation of hypothesis
Choose the correct answer from the options given below: - Arrange the steps involved in 'content analysis' in sequential order:
A. Identifying the main themes
B. Classifying responses under the main themes
C. Integrating themes and responses into the text of the report
D. Assigning codes to the main themes
Choose the correct answer from the options given below: - Identify the sources of secondary data from among the following:
A. Archival materials
B. Statistical reports
C. Population census
D. Journals
E. Content analysis
Choose the correct answer from the options given below: - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The concept of the single variable provided a sound approach to experimentation in the behavioural sciences.
Reason R: The earliest assumptions of experimental research were based on what was known as the 'law of the single variable'.
In the light of the above statements, choose the most appropriate answer from the options given below
