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Why does Intellectual Disability Prohibit Execution?


Atkins v. Virginia


In 1996, 18-year-old Daryl Renard Atkins was tried and found guilty of kidnapping, armed robbery, and murder. Atkins was sentenced to death. The Virginia Supreme Court later ordered a second sentencing hearing due to the trial court’s use of a verdict form which was found to be misleading. A forensic psychologist declared that the defendant had an IQ of 59 and was mildly mentally retarded as evidenced by his vocabulary, intellectual level, and behavior. Atkins was again sentenced to death.


In 2002, the United States Supreme Court held in Atkins v. Virginia, 536 U.S. 304 (2002) that it was unconstitutional to impose the death penalty on people with intellectual disabilities. It was found to be cruel and unusual to execute such individuals in violation of the Eighth Amendment. In addition to considering the momentum behind states declining to execute those with an intellectual disability, the Court also noted the two major justifications for the death penalty (retribution and deterrence) may not truly apply to those who are intellectually disabled. Such individuals are considered less culpable than the general population given their intellectual deficits which frequently result in impairments in rational thinking, understanding of cause and effect, abstract reasoning, social reasoning, planning and organization, and other areas of cognitive ability. Justice Stephens wrote, “Mentally retarded persons … have diminished capacities to understand and process information, to communicate, to abstract from mistakes and learn from experience, to engage in logical reasoning, to control impulses, and to understand others’ reactions. Their deficiencies do not warrant an exemption from criminal sanctions, but diminish their personal culpability.” Given this reduced culpability, subjecting such individuals to an equally severe level of retribution in the death penalty was judged to be an injustice. Further, an individual with such intellectual deficits is unlikely to have the ability to carefully weigh the potential risks of committing a capital crime, resulting in a diminished deterrence toward committing crimes. In essence, without either typical justification suitably supported for individuals with an intellectual disability, such a sentence is cruel and unusual.


An additional concern expressed by the Supreme Court of the United States in Atkins v Virginia is the increased likelihood of wrongful conviction of individuals with an intellectual disability. The court observed that such individuals are far more likely to make false confessions. This is in part due to the deficits mentioned above in addition to acquiescence, deference to authority, emotional immaturity, and susceptibility to suggestion amongst other factors. Such individuals, even when mentally fit to proceed to trial, are less likely to provide effective assistance to their defense attorneys and are less likely to be effective at testifying on their own behalf or at identifying useful evidence which might exonerate them. Further, individuals who are intellectually disabled may display social and emotional deficits which may be interpreted by jurors as a lack of remorse for their actions (while in reality it may be a lack of appreciation for the true nature of their circumstances and the victim’s amongst other reasons). This misattribution has led some jurors to seek the death penalty as has their misperception of an intellectually disabled person as being more dangerous. O’Connor, Kennedy, Souter, Ginsburg, and Breyer joined Stephens in his opinion.


The Importance of Competent Evaluators


It is important that the forensic psychologists who conduct evaluations for death penalty cases are well-trained and appropriately educated. As an illustration of the dangers of substandard and unethical work by a forensic psychologist, we may consider the first Atkins case to be tried in South Carolina. In 1995, Johnny Ringo Pearson was charged with rape and murder in South Carolina. Pearson had evidence of intellectual disability such as multiple intelligence tests showing an IQ below 70, special education, an inability to sustain employment, referral to a camp for those who are intellectually disabled by his school, and inability to pass the fifth grade. An expert opined that intelligence tests were inaccurate for poor, rural, black individuals in South Carolina and therefore an additional 10-15 points should be added to the intelligence score of 68. Despite this testimony, Pearson was ultimately ruled intellectually disabled by the judge and ineligible for execution. Although this case had a fair outcome, many others do not and it is important that psychologists, attorneys, the courts, and the general public ensure that competent and quality work is done to protect the rights of all individuals involved.


Authored by


Burçak Öktem Benjamin Silber

13 Comments


Eve Fritz
Eve Fritz
Feb 06, 2022

Great article, and I agree it is cruel and unusual...I was reminded about "Of Mice and Men" when the disabled kid kills the puppies... I remember reading that and thinking it was horrible but also getting that the kid didn't really understand what had happened or what he had done.

I'm curious, What is considered "intellectual disability" outside of an IQ test? What disabilities fall under this category?

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Sehrish I.
Sehrish I.
Feb 05, 2022

Interesting article and very well explained. What kind of punishments do the intellectually disabled people serve?

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Replying to

You are very welcome @Sehrish Iqtedar!

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Adeeba Tariq
Adeeba Tariq
Feb 05, 2022

Very interesting article indeed, perfectly depicting the importance of a competent forensic psychologist in criminal justice system. I believe forensic psychologist are a crucial and objective part of the whole justice system, their work makes the whole situation so much clear. Basically they are providing all the facts which are going to be crucial for the prevalence of justice. They are making sure that people with intellectual disabilities are held accountable with complete fairness hence protecting the rights of the perpetrator, on the other side they are making sure that no one misuse this intellectual disability clause to get away from the crime committed, hence making sure that victim gets justice. I personally can't imagine a fair criminal justice system…

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Burçak Öktem
Burçak Öktem
Feb 05, 2022
Replying to

Thank you for your comments and compliments about the article. You have very well described the necessity of a forensic psychologist in the justice system. I am happy that such an improvement has been made. I hope for the better.

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Daniel Sumner
Daniel Sumner
Feb 05, 2022

An interesting article that highlights the integral role played by forensic psychologists. One of the aims of criminal conviction is to protect the citizens and inhabitants of a given location - but the criminal is one of these individuals and thus the old adage much used but rarely heeded 'innocent till proven guilty' has to be at the forefront of our minds.


Forensic psychologists provide an objective way of assessing criminality and culpability. Those with intellectual disabilities need to be protected and assessed with fairness.


An informative article!

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Burçak Öktem
Burçak Öktem
Feb 05, 2022
Replying to

You explained it very well Daniel. Thank you for supporting with your annotations, descriptions and examples. I agree with you.

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Bojcevska Biljana
Bojcevska Biljana
Feb 05, 2022

The forensic psychologists who conduct evaluations for death penalty cases must be well-trained and appropriately educated. - Yes, this is true. However, someone must be held accountable for the crime committed.

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Burçak Öktem
Burçak Öktem
Feb 05, 2022
Replying to

Dear Bojcevska, we agree on the overall responsibility and importance of the judicial system. People with intellectual disabilities are less able to defend themselves, cooperate with their lawyers, and cognitive skills. this greatly strengthens the possibility of causing an irreversible path such as the death penalty by mistake. I agree with Benjamin on non-death penalty penalties. Thanks for your criticism and comments.

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