AS Psychology Evaluating Experimental Techniques

AS Psychology By the end of this lesson you should... Be able to describe 3 different types of experiment in Psychology Be able to explain the terms: Reliability, Validity and Replication Be able to evaluate the strengths and weaknesses of each

AS Psychology Reliability & Validity

AS Psychology In your groups: Discuss and generate a working definition of: Reliability Validity Replication

AS Psychology Reliability Is your measurement accurate? Test – Retest method? Inter-rater reliability?

AS Psychology Validity Have you measured what you thought you were going to measure? Also, does your result have Ecological Validity?

AS Psychology Replication If your experiment is Valid and Reliable, it could be done again and get the same result?

AS Psychology In your groups: Discuss and come up with a situation in which your measurement is:  Reliable but NOT Valid  Valid but NOT Reliable

AS Psychology Types of experiments… In your groups, read and prepare to report on:  Rosenthal & Fode (Lab experiment) or  Rosenthal & Jacobsen (Field experiment) or  Charlton et al (Natural experiment) Page 19

AS Psychology Now evaluate the study Use the information on page 18 to evaluate the study you have been looking at What are the strengths and weaknesses of each type of experiment? Prepare to feed back your answer

AS Psychology Round-up Think of a question for someone in the group…

AS Psychology Homework! Design, carry out and write up an experiment You will need to cover ALL 7 of the components of an experiment Use the correct terminology!!! Deadline is Monday 20 th September