10 Questions
What is the main difference between true experimental designs and quasi-experimental designs?
Random assignment
Which threat refers to the possibility that observed effects are due to natural maturation of subjects rather than the experimental treatment?
Maturation Threat
What is the Testing Threat concerned with in pre-post designs?
Subjects' posttest responses conditioned by pretest responses
Which type of threat refers to changes in the difficulty level of tests administered in pre-post designs?
Instrumentation Threat
What is the Morality Threat concerned with in experimental studies?
Differential dropout rates due to systematic reasons
How can many true experimental designs be converted into quasi-experimental designs?
By omitting random assignment
In quasi-experimental designs, what is the risk associated with non-equivalent groups?
Selection bias
'A general improvement in intellectual ability' is an example related to which type of threat?
Maturation Threat
'Posttest having a higher or lower degree of difficulty than the pretest' is associated with which type of threat?
Instrumentation Threat
What is the main concern of the Maturation Threat in research studies?
The natural development and improvement of subjects over time
Learn about probability sampling methods, which involve randomly selecting samples from a population to ensure equal chances for every individual. These methods aim to minimize bias and create representative samples for valid statistical inferences. Explore types like simple random sampling.
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