Statistical Testing

Question 1

What is the purpose of Statistical testing?

Answer 1

• to determine if what has been discovered is significant

Question 2

What is the Sign Test?

Answer 2

• A simple statistical test to test for a difference in nominal (categorical) data when the same pps have been tested in both conditions (repeated measures design)

Question 3

What is the accepted Probability in Psychology?

Answer 3

• The accepted level of probability in psychology is 5% (p=0.05). Even if we find a significant difference or relationship within the data, there is still up to 5% probability that it could have occurred by chance

Question 4

What is the Critical Value to be achieved for Significance?

Answer 4

• Value to be achieved for significance. Found in a table of critical values, we need to know N (number of pps), probability level (5%) and whether the test is one-tailed or two-tailed

Question 5

What is S and how do you calculate it?

Answer 5

• S is the is the number of the less frequent sign