Define the classic threats to internal validity

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Reference no: EM133424238

Assignment:

Read your Chapter from Experimental Psychology by Anna Myers: Identify the independent variables and levels of the IV in each of the following hypotheses and also dependent variables :

1. Absence makes the heart grow fonder.

2. It takes longer to recognize a person in a photograph seen upside down.

3. People feel sadder in blue rooms than pink rooms.

4. Waiting with others reduces anxiety.

What is internal validity? Why is it important for an experiment to have internal validity? Define each of the classic threats to internal validity and give an example of each.

1. History threat

2. Maturation threat

3. Testing threat

4. Instrumentation threat

5. Statistical regression threat

6. Selection threat

Reference no: EM133424238

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