Intelligence, IQ, and Crime

Intelligence, IQ, and Crime

Intelligence, IQ, and Crime History of mental testing and IQ The relationship between IQ and Crime Issues of Spuriousness Direct, or Indirect Effect Criticisms of the Bell Curve Alfred Binet French scientist who began in the field of craniometry

Began to doubt the validity of this method Around 1900, he started psychological testing (commissioned by government) Devised several mental tasks (counting coins, spatial reasoning) Binets Admonishment 1.Scores are a practical device They do not buttress any theory of intelligence

2.Scores are a rough empirical guide for identifying retarded children They should not be used to rank normal children 3.Children identified as retarded should be helped Low scores should not mark children as innately incapable The Creation of IQ Binet: eventually assigned an mental age to each

task (normal x years of age should complete) Subtract the physical age from the mental age to see how big the gap was (identify those in need) Later, others argued that the mental age should be divided by the physical age Intelligence Quotient was born The American bastardization Binets methods adopted by scientists in U.S.

They managed to break all of the rules H.H. Goddard coined the term moron, set at a mental age of 12 avid in the eugenics movement Lewis Terman Created the Stanford-Binet IQ exam Goal = rational society where people could be assigned jobs based on intelligence IQ tests today

No longer mental age/physical age All correlate with the Stanford Binet or other early versions Calibrated to produce a mean of 100 The Flynn effect Still multiple tasks covering different cognitive areas Seven J. Gould Two biggest mistakes regarding IQ scores

1. Reification 2. Hereditarian fallacy IQ and Crime Early positivists (Goddard) found large differences between criminals and non-criminals As testing improved, this difference shrunk Sutherland (1940s): it will dissapear Currently: 8-10 point gap Why this difference???

Possible Spuriousness Race, Class, SES, Culture? Controlling for these effects, the relationship remains Detection Hypothesis? Detected vs. Undetected offenders = no difference Impulsivity? Ruled out through statistical control If relationship is non-spurious

The Direct Effect Model (Hernnstien and Murray) Low IQ Indirect Effects Low IQ school trouble labeling process Crime Delinquency

Biological: Low IQ is proxy for neuropsychological damage (N.P. damage x Parenting) Delinquency Criticisms of the Bell Curve Only 3 variables in model (not enough control) Could control for school performance, other factors IQ explains only 3% of the variation in crime The correlation is about .06 Is this important enough to justify their policy

implication?? Ranked with other predictors, IQ is near the bottom of the list

Recently Viewed Presentations

  • Email, IC and ILP 1/5

    Email, IC and ILP 1/5

    Email, IC and ILP 1/5. I can… Login to the following: IC. ILP. Email. BW. How is email helpful? How does checking your grades online assist you as a student? Assignment. Login to IC. Change password on ILP. Email Mr....
  • Superloki Rocket - Michigan Technological University

    Superloki Rocket - Michigan Technological University

    Superloki Rocket Project Definition Design and build a payload for a rocket that will be entertaining to high school children participating in the "Rockets for Schools" program. Project Goals Relay video from the payload of the rocket as it descends...
  • Relative Clauses - KSU Faculty

    Relative Clauses - KSU Faculty

    The Titanic, which sank in April 1912, is the subject of a recent movie. Is the following sentence punctuated correctly? Only people, who speak Russian, should apply for the job. Incorrect! Only people who speak Russian should apply for the...
  • Physical education lesson plan: overhand throw

    Physical education lesson plan: overhand throw

    This is a lesson plan to teach the concept of overhand throwing to elementary students, particularly second graders. Rationale: This lesson plan is designed around the development of an overhand throw. Students at this age most likely understand how to...
  • Chapter 11

    Chapter 11

    Arial Wingdings 2 Wingdings Wingdings 3 Times New Roman Geneva LaFluer design1 1_LaFluer design1 Chapter 11 Chapter 11 Objectives Function of the Digestive System Organs of the Digestive System Organs of the Digestive Tract Organs of the Digestive Tract (cont'd.)...
  • Library, Archive and Museum Collaboration

    Library, Archive and Museum Collaboration

    The Justice Department has officially ended its inquiry into the assassinations of John F. Kennedy and Martin Luther King Jr, finding "no persuasive evidence" to support conspiracy theories, according to department documents. ... Irma and Paul Milstein Division of United...
  • Presents From My Aunts In Pakistan - Moniza

    Presents From My Aunts In Pakistan - Moniza

    The poem is composed of 7 stanzas with unequal lines in each stanza, 15, 11, 7, 6, 15, 10 & 5 lines. Line length is also uneven ranging from 2 to 13 syllables. There is only one rhyming line in...
  • Mathematics


    Sine and cosine rules. Area of triangle - ½ absinC. New to Foundation: Use of pi and surds standard form. Reverse percentages compound interest. Factorising quadratics simultaneous equations. Basic trigonometry direct and inverse proportion.