Mortality
In educational research, mortality (also referred to as experimental mortality or attrition) is a metaphorical term that is used to describe the loss of participants from a study prior to completion. Mortality is among one of eight common threats to internal validity. Threats to validity can be troublesome for research, as these threats limit the conclusions that can be drawn from a study.
Threats to internal validity inhibit researchers’ confidence in reporting that a relationship exists between an independent variable and a dependent variable. To make valid conclusions about the results obtained from a research study, there must be sufficient evidence to substantiate the claim. Mortality threatens this assumption because it compromises the quality and quantity of data garnered from a study.
Mortality is particularly problematic for ...
Looks like you do not have access to this content.
Reader's Guide
Assessment
Cognitive and Affective Variables
Data Visualization Methods
Disabilities and Disorders
Distributions
Educational Policies
Evaluation Concepts
Evaluation Designs
Human Development
Instrument Development
Organizations and Government Agencies
Professional Issues
Publishing
Qualitative Research
Research Concepts
Research Designs
Research Methods
Research Tools
Social and Ethical Issues
Social Network Analysis
Statistics
Teaching and Learning
Theories and Conceptual Frameworks
Threats to Research Validity
- All
- A
- B
- C
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- X
- Y
- Z