In many studies that span a long period of time, participants in the study may leave. This constitutes which of the following threats to internal validity?ऐसे अनेक अध्ययनों में जहाँ समयावधि लंबी होती है, अध्ययन में सहभागी छोड़ सकते हैं। यह आंतरिक वैधता के प्रति निम्नलिखित में से कौन-सा जोखिम है?
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Correct answer: C. Mortalityमर्त्यता (Mortality)
Explanation
Loss of participants during a study (drop-out/attrition) is called mortality. Testing is the effect of a pre-test, instrumentation is a change in the measuring tool, and maturation is natural change in participants over time.अध्ययन के दौरान सहभागियों का छोड़ जाना (ड्रॉप-आउट/क्षय) मर्त्यता (Mortality) कहलाता है। परीक्षण पूर्व-परीक्षण का प्रभाव है, उपकरणीकरण मापन उपकरण में परिवर्तन है और परिपक्वन समय के साथ सहभागियों में स्वाभाविक परिवर्तन है।More Research Aptitude questions
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