Starter 10 mins Define the key terms below

Starter (10 mins) Define the key terms below • • • Independent Variable Dependent Variable Extraneous Variable Confounding Variable Demand Characteristics

Experimental Designs (20 mins) • Lab Experiment • Field Experiment • Quasi-experiment • Write a brief description of each of the following types of design, including which approaches would favour which designs as well as advantages and disadvantages.

How will I run my experiment?

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 Condition 2 Words Pictures

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

Participants only take part in one condition of the experiment (2 separate groups) Words Pictures

Participants take part in both conditions of the experiment (1 group) Words Pictures

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

Each design has Strengths Weaknesses

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

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