Textbook Notes (368,566)
Canada (161,966)
Psychology (662)
PSYC 2400 (77)

Forensics Psychopathy.odt

3 Pages
Unlock Document

PSYC 2400
Kevin Nunes

Defining Psychopathy • Psychopath: a person with a collection of interpersonal, affective and behavioural characteristics including Interpersonal,Affective, Lifestyle andAntisocial deficits (manipulation, lack of remorse or empathy, impulsivity and antisocial behaviours). These do not necessarily have to be criminals – can be politicians, judges, etc and they may not even be committing any crimes. • Base Rate: indication of the prevalence of a specific problem (psychopathy) within a specific population (serial killers): • 90% of serial killers are psychopathic (study: overestimate because he applied the tools to people described in the media – proxy methodology). • 1% of the general population are psychopaths (reliable estimate). • 10-25% of the prison population are psychopaths. • 44% of cop killers are psychopaths. • 20% of male prisoners score above 30 (mean=22). • 14% of female prisoners score above 30 (mean=19). • Antisocial Personality Disorder (APD): (suffers from the lifestyle deficits) characterized by a history of behaviour in which the rights of others are violated; they have demonstrated conduct disorder by age 15 and display at least 3 of the following symptoms after 15: • Repeat criminal acts; • Deceitfulness; • Impulsivity ; • Irritability; • Reckless behaviours; • Irresponsibility, and • Lack of remorse. • APD places more emphasis on antisocial behaviours than the PCL-R. Nearly all psychopathic offenders meet the criteria forAPD but most offenders diagnosed withAPD are not psychopaths. 60-80% of prisoners haveAPD. Assessing Psychopaths • There are a few: • Experience Impressions “In my clinical opinion”: based on their experience, training, case-by- case. Though used, it’s frowned upon mostly because clinicians are inaccurate. • Self-Report Inventories: MMPI, MCI, PPI. Psychopaths can lie on self-report inventories so they’re not great. • Informant Rating:ASPD. Where you get information about the person via other sources. (Resolves the self-report problems). • Structured Clinical: DSM-IV (equated to antisocial personality disorder, though psychopathy and APD are different), PCL-R, PCL:YV (youth version). Best approach. • 2.1 PCL-R: Psychopathy-Checklist Revised • PCL-R: the most popular method of assessing psychopathy in adults (Dr. Hare); the assessment instrument is as follows... • 20 items scored using a semi-structured interview and a review of file information to assess the following three features: • Interpersonal Features: glib/superficially charming, grandiose/inflated self-worth, manipulative. • Affective Features: shallow emotions, lack of guilty, callous. • Behavioural (Lifestyle) Features: impulsivity, antisocial acts, poor anger control, criminal behaviours. • 3-point scale to measure psychopaths (2, scoring over 30 to 40), mixed – most criminals (1, scoring between 20 and 30) and non-psychopaths (0, scoring between 0 and 20). • 3. Psychopaths... (and why it’s important) • 3.1And Violence • Motives for Murder study: examining the relationship between psychopathy and how murders are committed by dividing them into Reactive (unplanned, crimes of passion, extreme provocation) and Instrumental (planned, settle a score). • Results: of the people exhibiting Low PCL-R scores, Reactive murders were more likely; of the people exhibiting High PCL-R scores, Instrumental murders are more likely. • Re-offender study: retrospective assessment of male offenders; they examined the release decision without knowing what the PCL-R score; they looked at parole releases and mandatory supervision (statutory – after serving ⅔ of sentence) releases. • Results: people re-offend as PCL-R score increases; statutory releases increase the likelihood of re-offending. InYouth • Juvenile Death Penalty study: hypothesis – if the person is labelled a psychopath, how does it affect the jury? Two cases
More Less

Related notes for PSYC 2400

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.