Laboratory Experiment
What are the strengths & Weaknesses?
(Relate strengths and weaknesses to the core study)
V-RED
• Variables, Replication, Ecological Validity, Demand Characteristics
STRENGTHS
V = Variables
Loftus & Palmer did this is in a controlled condition. Therefore allowing them to determine the cause and effect i.e words used in the questions caused differences in recall.
R = Replication
Because it was conducted in a laboratory experiment, any interested investigators who wish to further investigate Loftus & Palmer study can easy replicate the study.
Weaknesses
E = Ecological Validity
• Loftus & Palmer’s study used artificial situation therefore generalizing the results to real life would be an issue = low ecological validity.
D = Demand characteristics
• Participants probably looked for clues on how to behave and will try to give Loftus & Palmer answers they were looking for.
Only collected QUANTITATIVE DATA
strengths
- What is the problem with collecting quantitative data?
- Do you think qualitative data would benefit the experiment more?
EVALUATION NO. 3
WHAT IS THE DIFFERENCE BETWEEN WATCHING A CAR ACCIDENT IN REAL LIFE AND ON TV?
On Tv
- Less Distressing
- Expected to be asked questions about it, therefore watched the TV differently (intention-wise)
In Real-life
- Quite distressing (increase in emotion = fear, shock)
- May not be paying attention at first = element of surprise
EVALUATION NO. 4
SAMPLE: Students
Not representative of the general population
Can you apply the results of the students to all AGE groups?
The problems:
• Young therefore possible that they might have better memories
• Used to absorb information and then being asked questions about it.
• Less experienced drivers = less accurate in estimating speed
• Demand Characteristics?
Practical applications:
• Interviewing witnesses (both by police and lawyers) soon after an event
• Interviewers should avoid leading questions
• Educational setting?
