Statistical testing/Sign Test

Question 1

Significance

Answer 1

If the difference between two sets of data is greater than what would occur by chance, it is a significant result. To find out if the difference is significant a statistical test is needed

Question 2

Probability

Answer 2

Probability is the liklihood a certain event will happen if the null hypothesis were true. Generally accepted level of Probability in psychology is 0.05 (5% Significance level). Different significance levels used for different experiments.

Question 3

Critical value

Answer 3

The value that the S value is compared with to see whether the alternate or the null hypothesis is accepted. Critical value must be great than or equal to S-Value for the alternate hypothesis to be accepted

Question 4

The S value

Answer 4

The S value is the total of the less frequent sign

Question 5

The Sign test

Answer 5

The Sign test is used to analyse the difference in scores between related items, to decide whether the alternate or null hypothesis is accepted

Question 6

Conditions of Sign test usage

Answer 6

1.Repeated measures
2.Nominal Data used

Question 7

What happens when a participant scores equal in Condition A and B

Answer 7

Participant should be disregarded, deducted from the total number of participants (N value)

Question 8

3 things needed to know to find the critical value

Answer 8

1. Significance level
   2.The number of participants in the investigation or the degrees of freedom
2. Whether the hypothesis is directional (used a one-tailed test) or non-directional (used a two-tailed test)