Upload
colin-flowers
View
218
Download
1
Tags:
Embed Size (px)
Citation preview
1. What is meant by peer review? (2 marks)
2. Explain why peer review is an important aspect of the scientific process. (4 marks)
Starter Questions…
Define and Evaluate all types of METHODS
Peer Mark Homework
Understand how we can test and improve reliability of a study
Study MethodsLaboratoryA study in an environment where variables are tightly controlled
FieldAny study carried out outside the lab, but where the IV is still deliberately manipulated
NaturalThe environment and IV are naturally occurring
ObservationNaturalistic: in a natural environment, everything is left as normalControlled: Some variables are controlled by the researcherParticipant: The researcher takes part and observes from a Pps PoVNon-participant: The researcher watches the Pps from outside
Study Methods continued…
Questionnaires: A set of questions designed to investigate a topic
Interviews: A structured or unstructured set of Qs that are delivered face-to-face
Case studies: the study of an individual, small group or event, usually using information from a range of sources
Study Methods continued…
Study Designs1. Remember an example of a Lab, Field and Natural
2. Look up two advantages and two disadvantages for each design
Peer Mark Prep&
Hand it
So we will know…
2 Types of Reliability
How do we test them
And how to improve reliability
Being reliable and how to be even more reliable!!
We should be able to observe something time and time again and get the same results…
So… How do we do this?
Types of Reliability
External ReliabilityGetting the same results every time
Test 1: Test-retest
Test 2: Results correlationHigh Correlation coefficient = good reliabilityLow Correlation coefficient = low reliability
The one you already know!!
Types of Reliability
Internal ReliabilityConsistency within a test
Test 1: Split half methodCompare one half of the test with another
Test 2: Inter- or Intra- Observer test• Comparing 1 psychologists observations over time• Comparing 2 psychologists observations of the same
event
Improving Reliability
Take more than one measure from Pps
Pilot studies
Training observers (improving inter-rater reliability)
Careful entry of data
Exam Questions
Replication is one feature of the scientific method. The psychologists decided to replicate this experiment using a larger sample of 250 inexperienced drivers.Explain why replication of this study would be useful. (3 marks) June 13
June 2012
20 mins work – 10 mins peer mark!