PSYCH AND CRIM JUSTICE Flashcards
How could psych contribute to family law? EWP
Examines experiences within the court system.
◦ What is in the BIC.
◦ Perceptions of fairness in relation to child support
Fresh vs. New evidence
Fresh evidence- evidence which is discovered after the verdict that could not have been available at trial.
New evidence- evidence which was available to the accused or which the accused could reasonably have been expected to produce at the trial.
Theoretical framework for psych and crim justice
As a discipline, psychology is mainly concerned with the scientific study of human behaviour.
By scientific, we mean that “we ask precise questions, and… we test our ideas through systematic observation”
Eyewitness testimony
persuasive + unreliable
Explain misidentification
Misidentification is the greatest contributing factor to wrongful convictions proven by DNA testing.
Reliability - context of EWT
The identification of the accused would be reliable when the accused is consistently identified as the perpetrator of the crime (Thomson, 1996).
Validity - context of EWT
In the context of EWT- An identification is valid when it is “made from the witnesses memory of the offender at the time of the event, and not on the basis of extraneous factors” (Thomson, 1996, p12).
What is ecological validity?
Ecological validity refers to the extent to which the findings of research are able to be generalisable to real-life settings.
What is attributional bias
Recall may be influenced by our schemas - lead to stereotypes
What are schemas
Cognitive systems that help organise and make sense of info
Stereotypes
generalisations about members of social groups
Allport & Postman (1947)
Black vs white man (holding razor -white)
Descriptions of drawings passed around
RESULTS: The final description of the drawing had changed so that the black man was described as holding the razor in more than 50% of instances.
3 stages of Human memory model
- Encoding (attending to information).
- Storage (time between observation & recall). ◦
- Retrieval (recalling stored information).
2 types of eyewitness research
◦ Estimator variables.
◦ System variables.
Estimator variables
occur at the time of encoding and storing information and influence what is actually encoded and/or stored.
2 categories of estimator for ENCODING
Event factors (lighting conditons, violence levels) Witness factors (stress,age)
2 categories of estimator for STORAGE
Delay and Interference (increases over time, more = increase forgetting)
System variables
Influence retrieval ability (eg. line up, methods of questioning)
Laughery, Alexander & Lane (1971)
- Recognition of human faces based on exposure time
- short duration: 4 slides-2.5secs
long: 10 secs
Longer event observed = more accurate identification
Witness factors
Characteristics of witness = reliability
Alcohol + drugs
Loftus (1979) on Expectations
Expectations are biases that influence how we perceive environmental information
4 types of expectations (Loftus, 1979) - MECP
◦ Momentary expectations.
◦ Cultural expectations.
◦ Expectations from past experience.
◦ Personal prejudices.
Perceptual expertise theory
Increased exposure to people from our own race means we become good at processing facial features from our own race.
Process own race = configural manner (2 features at time)
other races = feature based (one feature at time)
Social cognitive theory
People process and encode OTHER race, category-specific and collectively, compared to OWN race identity-specific and individually
Think everyone from diff race look alike, own race = look same
Yerkes - Dodson Law (1908)
There is an optimal level of stress where performance is at its best - any stress above or below this point will interfere with performance”
What level of stress is best
Moderate levels
Christianson & Loftus (1978) - memory
Traumatic condition better to recall central details (type of incident) and less able to recall peripheral details
taxi example - hit vs. not hit child
Emotional arousal (Loftus & Burns, 1982)
Bank robbery (violent vs.non-violent) Witnesses of the non-violent simulation were more likely to recall the ‘critical item’ than witnesses of the violent simulation.
Post event info studies - Ceci, ross & toglia (1987) -
misleading info on children asking kids about who Loren who had a headache OR was just sick (unbiased)
Co-witness discussion
Paterson & Kemp (2006)
In survey research in Australia, Patterson and Kemp (2006) showed 86% of witnesses discussed the crime they observed, only to ensure they could provide information.
Skagerberg & Wright (2008)
In equivalent research, Skagerberg and Wright (2008) showed, 58% of witnesses discussed the crime and the most common topics discussed were crime and perpetrator details.
Paterson & Kemp - advice to police
to seperate witnesses to avoid co-witness discussion
LOFTUS AND PALMER (1974) - Language use
Car example (smashed, hit bump etc.) Loftus & Palmer (1974)
Most effective method of implanting implausible memories?
Fake photos
What factors influence susceptibility to post-event info
Cognitive factors - paid attention -expectations social factors - credibility of source - power and social attractiveness of source
What cognitive mechanisms cause memory impairment from post-event info
Memory co-existence hypothesis : Suggests people have 2 memories in the memory system (1 for the original event and 1 for post event information). As post event information is stored last, it is more likely to be retrieved first.
Memory over-riding hypothesis : Suggests that post event information completely over-rides the original memory, thereby creating a completely new memory.
What is source misattribution theory
- Failure to attribute retrieved information to the correct source
- Can result in confusion differentiating between the details of different events
- Big issue with children where there are multiple instances of an offence.
Factors that may result in suggestive or unfair identification parades
- Expectation
- ## Lineup bias (clothing, instruction bias, presentation, investigator etc.)
What did Malpass & Devine (1981) study?
Assessing the degree to which biased instructions cause misidentifications.
What is a blank lineup?
A blank line up is an initial lineup that does not contain the person of interest
The purpose is to screen out witnesses who are most susceptible to making relative judgements-
Sequential lineups?
Person conducting the lineup does not know which member is the person of interest
- Members of the lineup are presented individually and once only
- purpose: unable to compare the different members of the lineup to one another. Forced to compare each member of the lineup to their memory of the perpetrator.
Context reinstatement
Research shows that when context is altered, individuals are less able to accurately recall stored information.
Based on the encoding specificity principle developed by Tulving and Thomson (1986).
Lindsay & Bellinger (1999) - sequential lineups
Sequential lineups are very sensitive to any changes in process,
Steblay et al (2001) and line ups
Concluded that sequential lineups are superior to simultaneous lineups.
Simultaneous lineups increase the number of accurate identifications when the perpetrator is present.
Two stages of pre-trial confrontation
Investigatory stage
Evidentiary stage
Explain the Police and Criminal Evidence (PACE) Act (1984)
Search for the truth
Approach investigations with open mind
What does PEACE stand for (Interviewing)
Preparation and planning Engage and explain Account Closure Evaluation
Explain cognitive interview
A set of techniques used to increase the amount of accurate information obtained from a witness.
Current research on efficacy of cognitive interview
increases amount of correct, incorrect and confabulated info gathered
Koenken (1999) find relating to cognitive interviews
◦ 41% more correct details than the standard interview.
◦ 25% more incorrect details than the standard interview.
How many tiers in interview training
Five
Interviewing in Australia: What were the Impetus in England and wales & then in Australia
England: Number of widely publicised miscarriages of justice
Australia: Awareness of international improvements
When were principles of investigative interviewing introduced in WA
2009
Process of interrogation
Question & answer 2 objectives: - obtaining relevant and accurate info - gaining a confession These two objectives can work against each other
What is confession
Person admits guilt for an offence
False confession
Occurs when an innocent person admits guilt for an offence that he or she did not commit
3 psychologically distinct types of false confessions (VCC)
◦ Voluntary false confessions.
◦ Coerced-compliant false confessions.
◦ Coerced-internalised false confessions.
Voluntary false confession
Provided by a person without any external pressure by the police