Zusammenfassung der Ressource
Evaluations Issues
- Ethics
- + all participants consented to taking part
- and debriefed at the end
- - people could be cause psychological harm
as they may have been envloved in a car
accident - Protection of the Patient
- EV
- - high level of control
- done in a lab - creates an artificial
environment, this means it is difficult to
apply the results to an everyday situation
- low EV
- used real cars/ real crashes (some
staged)/ real life situation - they actually
witnessed them
- make a statement (Police
would ask for this) - 2nd study
- like reality - gap in between
statements
- - no emotional value
- different if it were to happen in real life
- expecting something to happen -
not realistic - real life happen by
suprise
- Data
- QUANTITATIVE
- useful for comparison
- does not give any
information into WHY
people gave the
answers they did
- Speed
- Broken glass
- CQ
- QUALITATIVE
- the statements
- Reliability
- YES it is reliable
- they will be able to replicate
it as it is highly controlled so
can be easily replicated by
others
- use the same questions/ video clips/
overall good ethics/ repliciability
- Validity
- YES, 2nd study - control group
- shows verb was changing
peoples memory
- Lab Experiment - highly controlled
- little chance of extraneous variables effecting the
results - cause and effect inferred
- high chance of DC - they are
voluntary Psychology students
- Sample
- students may be less experienced drivers than the general population -
maybe less confident in their ability to estimate speed - may have led
them to be more influenced by the words in the question
- may also become more susceptible to DC -
especially if they are students of the researchers
conducting the study
- know what Loftus specialises in - DC - memory
- students are used to looking at
screens and taking information in
- unrepresentative
- age bias (students - younger)
- location bias
(small area)
- personality bias ( certain type
of person to take psychology)
- Usefulness
- the recommendation was rejected by the Judiciary and the
Home Office, but Juries are now warned by the dangers of
honest mistakes by eyewitnesses
- helped those who had been wrongly accused
- now illegal to use leading questions - you cannot be found guilty
when there is only an EWT against you. Back up eye witnesses
- reconstructive nature of memory
- SNAPSHOT study