Assessing study designs

Question 1

What is a null hypothesis?

Answer 1

States that there is no relationship between the two variables being measured/

Researchers aim to disprove/ reject the null hypothesis which means that the alternative hypothesis was true/ accepted.

Question 2

What is an alternative hypothesis?

Answer 2

A statement that assumes there is a relationship between two variables.

Question 3

Cohen’s Kappa coefficient

Answer 3

• Measures agreement between two or more
assessors
• Indicates whether the agreement is due to chance or not
• Kappa of 1 = perfect agreement
• Kappa of = 0 indicates agreement due to chance