PSY1005 Semester 2 Lecture 1_Part2

In an example study that uses a between participants design...

• every participant ate multiple types of pizza

• every participant ate a different type of pizza

• some participants ate the same type of pizza

• every participant ate the same type of pizza

"There is a difference in pizzas eaten between those who are hungry and not hungry" This is a:

• non-directional null hypothesis

• directional experimental hypothesis

• directional null hypothesis

• non-directional experimental hypothesis

The null hypothesis tests ...

• the probability that there is no difference between groups

• systematic variation only

• the probability that there is a difference between groups

• systematic and unsystematic variation

The aim of null hypothesis testing is ...

• to confirm the null hypothesis

• to confirm the experimental hypothesis

• to falsify the null hypothesis

• to falsify the experimental hypothesis

We want the p value (probability) to be ...

• as small as possible

• as large as possible

A an independent t-test finds a result of p = .038 This result is...

• Significant

• Non-significant

Why would we use effect size in addition to p value?

• To make things more complicated

• To see if the p value is really significant

• To get an indication of 'psychological' significance

• To test if there is a significant difference between 2 groups