Type I And Type II Errors Flashcards
What is a null hypotheses?
‘No difference between conditions’
What is an alternative/ experimental hypotheses?
There will be a difference between conditions
What hypotheses is rejected for a type 1 error?
The null hypotheses is rejected and alternative hypothesis is accepted when it should be the opposite.
Which hypothesis is actually true for a type 1 error?
The null hypothesis
What is a type 1 error?
A false positive which claims to have found a significant result when there isn’t one.
What hypothesis is accepted for a type 2 error?
The null hypothesis is accepted and the alternative hypothesis is rejected when it should be the other way round.
Which hypothesis should actually be accepted for a type 2 error?
The alternative hypothesis
What is a type 2 error?
A false negative which claims to have not found a significant result when there is one.
When does a type 1 error usually occur?
If the significance is too high/ lenient
When does a type 2 error usually occur?
If the significance is too strict/ low
What does 0.05 do to the two errors?
Balance them
How do you choose a stats test?
- Difference or correlation
- Experimental design
- Level of measurement
How do we know if the experiment is difference or correlation?
From the hypothesis
What experimental design is used for related design?
- Matched pairs
- Repeated measures
What experimental design is used for unrelated design?
- independent measures