Power, Effect Size, Sample Size

Question 1

Definition of Power

Answer 1

Probability of detecting a real effect.

Power = 1 - beta

Question 2

Definition of Effect Size

Answer 2

difference between the means.

Question 3

What are the effects of Effect size, Standard Deviation, Sample Size and Significance Level on Power?

Answer 3

Effect-Size, Power +
Standard Deviation, Power -
Sample Size, Power +
Significance Level, Power +

Question 4

Definition of Manipulation

Answer 4

the process by which an experimenter creates the independent variables operationally within the experimental setting.

Question 5

Definition of Stimulus

Answer 5

Vehicle through which the experimenter manipulate the levels of the factors hypothesised to cause effect or outcome.

Question 6

Definition of Manipulation Check

Answer 6

procedure designed to verify that the controlled factors have indeed been implemented as expected.

Question 7

How to conduct manipulation checks?

Answer 7

1. Pre-testing. pros/cons
2. Check after treatment but before measurement of dependent variable. Pros/Cons
3. Check after the measurement of the outcome variable.