Legal decisionmaking

13 important questions on Legal decisionmaking

Flaws in legal decision making

.EMOTIONS
LIMITATIONS IN LOGICAL REASONING
CONTEXTUAL EFFECTS

How do we affect decision making?

.Several ways to affect rational decision making:

Prosecutor’s fallacy
Intuition
Tunnel Vision and Confirmation bias

Tunnel vision and confirmation bias?

.Tunnel vision: Legal decision markers have some motivation to find evidence against the primary suspect (Findley & Scott, 2006)
Example in criminal procedures: The suspect is supposed of having committed a crime

Confirmation bias: Tendency to selectively seek confirmation of personal presumptions, ignoring counterarguments
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Other confirmation basises? Studies

.Kassin et al., 2010: Replicated findings and selection of incriminating elements associated with crime severity
Schunemann & Bandilla (1989): Effect of reading suspect’s file before court sessions
Jenkins & Schuller (2007) and Rassin (2013): FPE (i.e., difficulty with detecting negative causation)

Mckenzie 2002 order effect

.Order effect when the order in which the decision marker processes the evidence affects the conviction
Case vignette of a burglary to 120 students
Strong vs weak strength of the case for the prosecution
Three ratings of suspect’s guiltiness (i.e., baseline, after the prosecution and the defence)

Rassin 2017 on evidence order?

.Case vignette about nocturnal burglary to 84 professional judges
3 pieces of incriminating evidence: DNA (although explained by alternative scenario), witness identification, and confession
Participants rated the strength of the evidence
Different presentation of DNA trace, identification, and confession information
on evidence order •Conviction rate higher when DNA first (Study 2)
•Addition of a diagnosis inflated conviction rate (Study 3)

Caruso 2016 order of evidence

.Slow motion effect on perceived intent of perpertator
Recordings are oftentimes played in slow motion (e.g., 2.25 slower than regular speed)
Unintended impression that the perpetrator of the crime had more time to inhibit himself: Perceived intent is inflated

Results:
Willingness to commit the crime 82% in SM compared with 74% regular speed

Avoid wrong legal decisons? Blind testing

  • blind testing approach we need to consider relevant information. kassin it is obvious but it is not the case like using the history of a suspect.

Avoid wrong legal decions multi comperions

multi comparisons cooper and meterk: support the idea of trying to collect the same info from different sources. like interviewing more people on the same matter.

Avoid wrong legal decisions  likelihood ratio format

  • likelihood ratio format wagenaar & schier: is high reccomendated when legal practioner make decisions they should support decisions with providing rate of likelihood that it supports final decisions.

Alternative scenarios, avoid wrong legal decions?

  • alternative scenarios: the idea is that legal practitioner should use different approach compared to traditional one. practitioners have to understand if the evidence supports the alternative scenarios or the supported scenario.

Bayesian network analusis: how to avoid wrong legal deciosns?

  • bayesian network analysis: alternative approach which is based on alternative approach, use of system. you can skip this you have to know it.

What is another way to avoid a wrong legal decions?

another alternative to avoid them is to have good knowledge of pychologoical processes and evidence. if practioners are educated on psychological findings they can detect more wrong findings and avoid wrong legal decisions. this is true in the case of represse memories. people believe we can forget.this concept is support

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