PART TWO: Spot the Internal Validity Threat that is MOST...

PART TWO: Spot the Internal Validity Threat that is MOST likely at work for each of the following scenarios: Use the key below to match the study validity description with the specific validity threat 1. Maturation 2. Regression to the mean 3. Selection 4. Mortality 5. Instrumentation 6. Testing 7. History 8. Interactions 9. Diffusion 10. No Threat

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Transcript

00:01 Hi everyone, question is on internal validity rate.

00:14 Let's write down answer for this and the answer of first term maturation refers to growing older or growing stronger.

00:33 For example, new joinies are new to the job at the time of pre -test a month later, performance has improved as a result of time.

00:44 The answer of next term is regression to the mean refer to the data that is extremely higher or lower than the mean will likely be closer to the mean if it is measured as a second time.

01:00 For example, students are placed into group based on their initial score, it is hard to say whether the outcome would be due to the treatment.

01:12 The next term is selection.

01:15 This refers to the two or more groups are different in a fundamental way other than focus of the experiment.

01:26 For example, high square where place in group a and low scorer place in group b.

01:34 Next term is mortality.

01:37 It means people are dying with respect to your study.

01:57 For example, some volunteers get serious and die after vaccination.

02:05 Next term is instrumentation.

02:08 Instrumentation refers to the actual change in the measuring procedure rather than any change the person over time.

02:21 For example, in pre -test, productivity was measured for 10 minutes while post -test was over 15 minutes...

Question

Please give Ace some feedback