1.7 Experiemental Design

Question 1

What are the two types of studies

Answer 1

Observational Study - it observes and measures variables of interest but does not influence the response.

Experimental Study - deliberately imposes some treatment on individual (elements) to measure their response

Question 2

Define placebo

Answer 2

Is a substance that is made to resemble a drug(medicine) but does not contain an active drug, and are used as a control in drug testing

Question 3

Define responsive variable

Answer 3

Measures an outcome of a study

Question 4

Define explantory variable

Answer 4

Helps to explain or influence the changes in a response variable

Question 5

Define lurking Variable

Answer 5

Is one that is not explanatory or responses but can influence how we interpret the relationship between them

Question 6

Define Confounding

Answer 6

Confusing one variable (thing) for the cause of something happening. In other words, the response is partially do to a third factor or variable.

Question 7

What are the 3 types of confounding:

Answer 7

Confounding variable - 3rd variable that we know about that could causing the response

Placebo effect - an effect that occurs from a fake treatment because the patient believes that the effect should occur.

Blinding (Single Blind or Double Blind) -
1.) Single-Blind - the subjects are unaware of which treatment they are receiving but the researcher knows.
2.) Double-Blind - neither the subjects nor the researcher know the treatment a subject received.

Question 8

What are the characteristics of a well designed experiment?

Answer 8

Question 9

What are the three types of experiment designs:

Answer 9

Question 10

Experiment Design Example

Answer 10