Probability and significance

What is the standard accepted level of significance in psychological research

• 0.01

• 0.05

• 0.10

Which is considered too strict

• 0.01

• 0.05

• 0.10

Which is considered too lenient

• 0.01

• 0.05

• 0.10

The alternative or experimental hypothesis is the same thing

• true

• false

This hypothesis states there is ‘no difference’ between the two conditions.

• Alternative hypothesis

• Experimental hypothesis

• Null Hypothesis

Psychologists can never be 100% certain about a particular result

• true

• false

Once a statistical test has been calculated the result is a number called the ...

• calculated/observed value

• critical value

_____________ value- a number that tells us whether we can reject the null hypothesis and accept the alternative hypothesis.

• calculated

• observed

• critical

There are 3 things you need to know to know which critical value to use, which of the following is NOT one of them?

• One-tailed or two-tailed test

• The number of ppts in the study

• The level of significance

• what research method was used

when do you use a one tailed test

• when your hypothesis is non directional

• when your hypothesis is directional