WEEK 3: Variables, concepts and measures

Question 1

Subject variables

Answer 1

Subjects variables are characteristics of the participants or subject and can not be manipulated
Examples: Gender, religion

Question 2

Nominal variables

Answer 2

variables which are measured by allocatingcases to categories

Question 2

Nominal variables

Answer 2

variables which are measured by allocatingcases to categories

Question 3

What terms are used instead of IV and DV in non experiments

Answer 3

Predictor variable (IV)
Criterion variables (DV)

Question 4

Mediator variables
Responsible for?

Answer 4

Explains the relationship between the independent variable and dependant variable

Responsible for the relationship between two variables

Question 5

Moderator variable

Answer 5

Shows that the relationship between the IV and DV is not consistent throughout the data

Question 6

Stevens theory of scales of measurement
How many types of measurement?
Different types of?
Order from least to most powerful

Answer 6

Agrued that there are 4 different types of measurement with different mathematical properties
Need different types of statistical analysis
Order
least powerful- nominal, ordinal, interval, ratio scales of measurement- most powerful

Question 7

Difference between confounding variabe and extranoues variable

Answer 7

An extraneous variable has the potential to influence the DV in an experiment

A confounding variable does have an unwanted effect on the DV. It is difficult to establish whether the impact on the DV was due to the IV or a confounding variable