Research methods - Pearson's r

Question 1

Step 1

Answer 1

• association between 2 variables
• both variables must have interval or ratio data and be normally distributed

Question 2

Step 2

Answer 2

The correlation between the 2 variables will fall between -1 and +1
- called r

Question 3

Step 3

Answer 3

• r is positive: relationship between both variables is positive
• r is negative: relationship between both variables is negative

Question 4

Step 4

Answer 4

Observed value must be greater than or equal to the critical value to be significant

Question 5

Step 5

Answer 5

Calculate degrees of freedom (df)

Question 6

Step 6

Answer 6

If the observed value is less than the degrees of freedom, it is not significant

Question 7

Step 7

Answer 7

If it is not significant, the psychologist cannot reject the null hypothesis