Probability & Significance (AQA A-Level Psychology): Flashcards
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Practise the cards
10 cards from this deck
Calculated value in statistical testing
Calculated value in statistical testing
Numerical result from a statistical test
Alternative hypothesis (H₁)
Alternative hypothesis (H₁)
Proposes a specific outcome/effect; alternative to null
Null hypothesis (H₀)
Null hypothesis (H₀)
States there is no difference between conditions
Type I error
Type I error
False positive; rejecting a true null hypothesis
Type II error
Type II error
False negative; accepting a false null hypothesis
Standard significance level in psychology
Standard significance level in psychology
p ≤ 0.05 (5%)
Critical value
Critical value
Cut-off point for accepting/rejecting null hypothesis
When to use a one-tailed test
When to use a one-tailed test
When hypothesis is directional
When to use a two-tailed test
When to use a two-tailed test
When hypothesis is non-directional
Why 5% significance level is favoured
Why 5% significance level is favoured
Balances risk of Type I and Type II errors