Methods- Laboratory Experiments

Lab Experiments:

• artificial environment
• manipulated I.V
• D.V can be measured accuarately
• Experimental design usually Independent Groups
• control groups are used as a baseline to compare results to
• ALWAYS has an experimental hypothesis
• Example Loftus and Palmer- I.V was the leading question D.V- estimates of speed
• 

Evaluation

+ Reliable-all extraneous variables are tightly controlled and as a result the experiments can be repeated and are likely to produce the same results.

+ Cause and effect relationships can be measured as it is easy to see how one variable effects the other (e.g. How Leading questions affect estimates of speed)

+High validity as control groups are able to be set up which means the researcher can see if the study is affected by any confounding variables

+ can produce quantitative data as well as qualitative data so quantative data is…