1. The experiment in psychology
Crash Course Lesson 2

2. How will I run my experiment?
Experimental Design
How will I run my experiment?

3. Most simple experiments involve 2 conditions – these are 2 versions of the independent variable. e.g. Using words or pictures to learn a list of items.
Condition 1
Words
Condition 2
Pictures

4. Independent measures design Repeated measures design
There are 3 different ways to carry out the experiment with participants. These are known as Experimental Designs.
Hmmm…...
Independent measures design
Repeated measures design
Matched pairs design

5. Independent Measures Design
Participants only take part in one condition of the experiment (2 separate groups)
Words
Pictures

6. Repeated Measures Design
Participants take part in both conditions of the experiment (1 group)
Words
Pictures

7. Matched Pairs Design
Participants are matched in each condition for characteristics that may have an effect on their performance. e.g. A memory test 2 1 2 1 1 2 2 1 1 2

8. Each design has
Strengths
Weaknesses

9. The colour pink is so awesome...
Key things to think about are Individual Differences
The colour pink is so awesome...
I’m cleverer than her!

10. They think I’ll remember pictures better than words
Demand Characteristics are the cues which might reveal your aim
Cat
Dog
House
I got bored the second time …
Order Effects are caused by repeated tests

11. Order effects are situational variables
Can you name any others?