Jury Decision Making - Lecture 6 Flashcards
How many people form a jury in England and Wales?
12 people
How many people form a jury in Scotland?
15 people
How long MUST a jury try to reach a unanimous verdict?
2 hours
After 2 hours, what majority will be accepted?
10-2
If a 10-2 verdict is not reached, what is the jury called?
A hung jury
In what percentage of criminal trials is trial by jury used? And in what type of cases?
In 2% of trials and for cases where the accused has pleaded not guilty
Where is expert testimony on the factors influencing eyewitness evidence more common?
More common in the US than in the UK
When does expert testimony have more impact?
It has more impact when evidence is complicated (Cooper et al, 1996)
Judges may rule expert testimony as inadmissible or jurors may discount expert testimony. Why?
- Tells us nothing new
- It is based on laboratory studies
- Eyewitness account is too compelling
Do jurors rely heavily on witness’ confidence? If so, why?
Yes they do, to infer accuracy
What is the reality about confidence and accuracy?
Confidence is a poor indicator of accuracy.
What did Penrod and Cutler (1995) report?
Jurors had a tendency to ‘over-believe’ eyewitness testimonies.
They are not sensitive to factors that influence accuracy.
Rely on confidence assessments of witnesses (this can be influenced by post-identification information).
Expert testimony can reduce this reliance on confidence (Loftus, 2010)
What did Wright and Skagerberg, 2007 conclude about eyewitness confidence?
That it is malleable
What study did they undertake?
134 real eyewitnesses attending UK police identification suite were involved.
Following parade, witness said how confident they were in their decision.
Witness was then told outcome of their identification.
Witness again rated their confidence
Feedback about identification decision affected witness’ confidence (those that had picked the suspect became more confident)
Does attractiveness play role in the length of sentence?
According to Sigall and Ostrove (1975), physically attractive defendants received lower sentences based on a mock case using photographs.
According to Saladin et al (1988), using 8 photos, attractive men were considered less capable of committing a crime, but moderated by crime severity.
According to Stewart (1980), attractive, clean, neat and well dressed defendants received lower sentences, but it had no effect on the verdict.
According to Kerr (1978), attractive victims are more frequently supported by guilty verdicts.
How do jurors reach a verdict?
Pennington and Hastie (1986, 1982) introduced the story model - jurors constructed a story-like account to organise and interpret evidence that they hear.
These sotries fit with the juror’s general knowledge about structure of stories (eg. coherence and consistency) and their beliefs and expectations of how the legal system works.
Juror’s decision is based upon an evaluation of how plausible and complete the story is.
If done early on, there will be a bias towards evaluating subsequent evidence in light of story they have constructed (confirmation bias).
Who invented the dual-process theory?
Eagly and Chaiken, 1993.
What are the two processes?
Systematic and Heuristic
What is systematic processing?
Slower and more effortful thinking when the juror closely scrutinises and analyses the evidence
What is heuristic processing?
Faster, more automatic thinking which involves less detailed scrutiny of evidence.
eg. “There is no smoke without fire” or “Experts can be trusted”.
What did Carlson and Russo (2001) say about the story model?
That it is the best account but that all stories will be different (because of influence of prior beliefs etc) and this may impact on outcomes made by juries.
What four things make up the complexity of evidence?
Complexity of evidence
Number of witnesses
Length of trial
Number of charges
What makes up the quality of information?
Number of documents
Number of items in evidence
Number of parties involved (eg. complaints)
When is heuristic processing favoured/used?
When people are tired, pressured for time, evidence is complex or there is a lack of knowledge on the topic.