Monday, March 12, 2018

CHC intelligence theory update: Live chat (this Sunday evening) or later viewing on YouTube

I am looking forward to talking about the Cattell-Horn-Carroll (CHC) model of intelligence on the #psychedpodcast this sunday evening.

I will present material largely based on the forthcoming CHC chapter coauthored with Dr. Joel Schneider.  Tune shall be fun. Or, watch the discussion later on YouTube, and eventually as an audio podcast on iTunes

Friday, March 2, 2018

BB (blatant brag): McGrew CHC 2009 article in Intelligence #1 (2008-2015) and top #10 all time

This was a pleasant surprise. I knew my 2009 Intelligence article was cited frequently but I never knew it was number one from 2008-2015 and it made the top 10 all time list for the journal Intelligence. I believe this is a reflection of the impact the CHC taxonomy has had. This should make my mom proud. Here is a link to the original article.

Bibliometric analysis across eight years 2008–2015 of Intelligence articles: An updating of Wicherts (2009). Article link.

Bryan J. Pesta


I update and expand upon Wicherts' (2009) editorial in Intelligence. He reported citation counts of papers pub-lished in this journal from 1977 to 2007. All these papers are now at least a decade old, and many more new articles have been published since Wichert's analysis. An updated study is needed to help (1) quantify the journal's more recent impact on the scientific study of intelligence, and (2) alert researchers and educators to highly-cited articles; especially newer ones. Thus, I conducted a bibliometric analysis of all articles published here from 2008 to 2015. Data sources included both the Web of Science (WOS), and Google Scholar (GS). The eight-year set comprised 619 articles, published by 1897 authors. The average article had 17.0 (WOS), and 32.9 (GS) citations overall (2.75, and 5.33 citations per year, respectively). These metrics compare favorably with those from other psychology journals. In addition, a list of the most prolific authors is provided. Also reported is a list showing many articles in this set with counts greater than one hundred, and an updated top 25 list for the history of this journal.

“Also noteworthy is that nine of the articles in the old list (not shown here) dropped off the new list. Of their replacements, only three of the nine were published within the last decade: Deary, Strand, Smith, and Fernandes (2007); McGrew (2009), and Strenze (2007). The McGrew (2009) paper is again notable. It is the only article in my newer set (2008–2015) to make the all-time list. The paper ranks ninth on the all-time list with 281 citations, just eight years after being published.”

More recent Google Scholar citation info indicates that the article is still going strong from 2016-2017.

Click on images to enlarge.

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Monday, February 19, 2018

Does the rot start at the top? On a current Flynn effect study argument

Does the rot start at the top?

As readers of this blog will know, it is usually Woodley of Menie who darkens these pages with talk of genetic ruin, while James Flynn is the plucky New Zealander…

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Sunday, January 28, 2018

Research Byte: Psychological and Cognitive Aspects of Borderline Intellectual Functioning : A Systematic Review

Psychological and Cognitive Aspects of Borderline Intellectual Functioning: A Systematic Review

Contena, B., & Taddei, S. (2017). Psychological and Cognitive Aspects of Borderline Intellectual Functioning. European Psychologist. Article link.
Bastianina Contena and Stefano Taddei


Borderline Intellectual Functioning (BIF) refers to a global IQ ranging from 71 to 84, and it represents a condition of clinical attention for its association with other disorders and its influence on the outcomes of treatments and, in general, quality of life and adaptation. Furthermore, its definition has changed over time causing a relevant clinical impact. For this reason, a systematic review of the literature on this topic can promote an understanding of what has been studied, and can differentiate what is currently attributable to BIF from that which cannot be associated with this kind of intellectual functioning. Using Preferred Reporting Items for Systematic Review and Meta-Analyses( PRISMA) criteria, we have conducted a review of the literature about BIF. The results suggest that this condition is still associated with mental retardation, and only a few studies have focused specifically on this condition.
Keywords: borderline intellectual functioning, borderline mental retardation, intellectual disability, systematic review

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Wednesday, January 17, 2018

Validity, Interrater Reliability, and Measures of Adaptive Behavior: Concerns Regarding the Probative Versus Prejudicial Value

Validity, Interrater Reliability, and Measures of Adaptive Behavior: Concerns Regarding the Probative Versus Prejudicial Value

Psychology, Public Policy, and Law. Article link.

Karen L. Salekin,The University of Alabama
Tess M. S. Neal,Arizona State University
Krystal A. Hedge, Federal Medical Center, Devens, Massachusetts

The question as to whether the assessment of adaptive behavior (AB) for evaluations of intellectual disability (ID) in the community meet the level of rigor necessary for admissibility in legal cases is addressed. AB measures have made their way into the forensic domain, in which scientific evidence is put under great scrutiny. Assessment of ID in capital murder proceedings has garnished a lot of attention, but assessments of ID in adult populations also occur with some frequency in the context of other criminal proceedings (e.g., competence to stand trial, competence to waive Miranda rights), as well as eligibility for social security disability, social security insurance, Medicaid/Medicare, government housing, and postsecondary transition services. As will be demonstrated, markedly disparate findings between raters can occur on measures of AB even when the assessment is conducted in accordance with standard procedures (i.e., the person was assessed in a community setting, in real time, with multiple appropriate raters, when the person was younger than 18 years of age), and similar disparities can be found in the context of the unorthodox and untested retrospective assessment used in capital proceedings. With full recognition that some level of disparity is to be expected, the level of disparity that can arise when these measures are administered retrospectively calls into question the validity of the results and, consequently, their probative value.

Keywords: adaptive behavior measures, Atkins, forensic evaluations, validity, interrater reliability

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Friday, January 12, 2018

Five Factor Model personality disorder scales: An introduction to a special section on assessment of maladaptive variants of the five factor model.

Five Factor Model personality disorder scales: An introduction to a special section on assessment of maladaptive variants of the five factor model.
// Psychological Assessment - Vol 22, Iss 2

The Five-Factor Model (FFM) is a dimensional model of general personality structure, consisting of the domains of neuroticism (or emotional instability), extraversion versus introversion, openness (or unconventionality), agreeableness versus antagonism, and conscientiousness (or constraint). The FFM is arguably the most commonly researched dimensional model of general personality structure. However, a notable limitation of existing measures of the FFM has been a lack of coverage of its maladaptive variants. A series of self-report inventories has been developed to assess for the maladaptive personality traits that define Diagnostic and Statistical Manual of Mental Disorders (fifth edition; DSM–5) Section II personality disorders (American Psychiatric Association [APA], 2013) from the perspective of the FFM. In this paper, we provide an introduction to this Special Section, presenting the rationale and empirical support for these measures and placing them in the historical context of the recent revision to the APA diagnostic manual. This introduction is followed by 5 papers that provide further empirical support for these measures and address current issues within the personality assessment literature. (PsycINFO Database Record (c) 2018 APA, all rights reserved)

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Sunday, January 7, 2018

Research Byte: False Confessions: How Can Psychology So Basic Be So Counterintuitive?

False Confessions: How Can Psychology So Basic Be So Counterintuitive?

American Psychologist © 2017 American Psychological Association 2017, Vol. 72, No. 9, 951–964 0003-066X/17/$12.00 Article link.

Saul M. Kassin John Jay College of Criminal Justice of CUNY

Recent advances in DNA technology have shined a spotlight on thousands of innocent people wrongfully convicted for crimes they did not commit—many of whom had been induced to confess. The scientific study of false confessions, which helps to explain this phenomenon, has proved highly paradoxical. On the one hand, it is rooted in reliable core principles of psychology (e.g., research on reinforcement and decision-making, obedi-ence to authority, and confirmation biases). On the other hand, false confessions are highly counterintuitive if not inconceivable to most people (e.g., as seen in actual trial outcomes as well as studies of jury decision making). This article describes both the psychology underlying false confessions and the psychology that predicts the counter-intuitive nature of this same phenomenon. It then notes that precisely because they are so counterintuitive, false confessions are often “invisible,” resulting in a form of inatten-tional blindness, and are slow to change in the face of contradiction, illustrating belief perseverance. This article concludes by suggesting ways in which psychologists can help to prevent future miscarriages of justice by advocating for reforms to policy and practice and helping to raise public awareness.

Keywords: interrogation, false confessions, confirmation bias, social influence, wrongful convictions

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Monday, December 18, 2017

Atkins court decision: Farad Roland v USA (NJ; 2018)

Today the opinion regarding the Atkins ID decision for Farad Roland was issued.  As per my policy, having served as an expert witness in this particular case, I offer no comments.  The opinion can be found here.

Friday, December 15, 2017

Does the rot start at the top? New different Flynn effect research

Does the rot start at the top?

From Twitter, a Flipboard magazine by James Thompson

As readers of this blog will know, it is usually Woodley of Menie who darkens these pages with talk of genetic ruin, while James Flynn is the plucky New Zealander…

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Saturday, December 9, 2017

Research review of efficacy of effort testing with culturally, ethnically, and linguistically diverse populations

Cross-Cultural Feigning Assessment: A Systematic Review of Feigning Instruments Used With Linguistically, Ethnically, and Culturally Diverse Samples

Alicia Nijdam-Jones and Barry Rosenfeld Fordham University

The cross-cultural validity of feigning instruments and cut-scores is a critical concern for forensic mental health clinicians. This systematic review evaluated feigning classification accuracy and effect sizes across instruments and languages by summarizing 45 published peer-reviewed articles and unpublished doctoral dissertations conducted in Europe, Asia, and North America using linguistically, ethnically, and culturally diverse samples. The most common psychiatric symptom measures used with linguistically, ethnically, and culturally diverse samples included the Structured Inventory of Malingered Symptom-atology, the Miller Forensic Assessment of Symptoms Test, and the Minnesota Multiphasic Personality Inventory (MMPI). The most frequently studied cognitive effort measures included the Word Recogni-tion Test, the Test of Memory Malingering, and the Rey 15-item Memory test. The classification accuracy of these measures is compared and the implications of this research literature are discussed.

Public Significance Statement This study suggests that there is only a modest amount of research examining the use of feigning assessment measures with linguistically, ethnically, and culturally diverse populations. As psychol-ogists in the United States and other Western, English-speaking countries assess individuals from diverse linguistic, ethnic, and cultural backgrounds, it is important that the assessment techniques that they rely on have demonstrated utility in non-English cultures and languages.

Lick on image to enlarge. Article link.

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Research Byte: The Role of Visuospatial Ability in the Raven's Progressive Matrices

File under Gf and Gv as per CHC theory.

The Role of Visuospatial Ability in the Raven's Progressive Matrices

Nicolette A. Waschl, Ted Nettelbeck, and Nicholas R. Burns

School of Psychology, University of Adelaide, SA, Australia


Debate surrounding the role of visuospatial ability in performance on the Raven's Progressive Matrices (RPM) has existed since their conception. This issue has yet to be adequately resolved, and may have implications regarding sex differences in scores. Therefore, this study aimed to examine the relationship between RPM performance, visuospatial ability and fluid ability, and any sex differences in these relationships. Data were obtained from three samples: two University samples completed the Advanced RPM and one population-based sample of men completed the Standard RPM. All samples additionally completed an alternative measure of fluid ability, and one or more measures of visuospatial ability. Structural equation modeling was used to examine the relationships between performance on the visuospatial and fluid ability tests and performance on the RPM. Visuospatial ability was found to significantly contribute to performance on the RPM, over and above fluid ability, supporting the contention that visuospatial ability is involved in RPM performance. No sex differences were found in this relationship, although sex differences in visuospatial ability may explain sex differences in RPM scores.

Keywords: Raven's Progressive Matrices, fluid ability, visuospatial ability, sex differences

Click on images to enlarge. Article link.

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Tuesday, November 14, 2017

Intellectual Disability and the Death Penalty: Current Issues and Controversies: Marc J. Tassé Ph.D., John H. Blume JD MAR: 9781440840142: Books

Providing key information for students or professionals in the fields of criminology, education, psychology, law, and law enforcement, this book documents the legal and clinical aspects of the issues related to intellectual disability and the death penalty.

• Provides a comprehensive review of the legal and clinical aspects of the death penalty and intellectual disability

• Offers a detailed discussion of the Supreme court decision in Atkins v. Virginia as well as a review of court decisions since that 2002 ruling

• Details the diagnostic issues related to determination of intellectual disability, such as the assessment of intellectual functioning, adaptive behavior, and age of onset

• Shares best practices in clinical assessment and important forensic matters that must be considered

Thursday, November 9, 2017

Research Byte: What Causes the Anti-Flynn Effect? A Data Synthesis and Analysis of Predictors

Woodley of Menie, M. A., Peñaherrera-Aguirre, M., Fernandes, H. B. F., & Figueredo, A.-J. (2017). What Causes the Anti-Flynn Effect? A Data Synthesis and Analysis of Predictors. Evolutionary Behavioral Sciences. Advance online publication.

Article link.


Anti-Flynn effects (i.e., secular declines in IQ) have been noted in a few countries. Much speculation exists about the causes of these trends; however, little progress has been made toward comprehensively testing these. A synthetic literature search yielded a total of 66 observations of secular IQ decline from 13 countries, with a combined sample size of 302,234 and study midyears spanning 87 years, from 1920.5 to 2007.5. Multilevel modeling (MLM) was used to examine the effect of study midyear, and (after controlling for this and other factors) hierarchical general linear modeling (GLM) was used to examine the following sequence of predictors: domain “g-ness” (a rank-order measure of g saturation) Index of Biological State (IBS; a measure of relaxed/reversed selection operating on g), per capita immigration, and the 2-way interactions IBS × g-ness and Immigration × g-ness. The MLM revealed that the anti-Flynn effect has strengthened in more recent years. Net of this, the GLM found that g-ness was a positive predictor; that is, less aggregately g-loaded measures exhibited bigger IQ declines; IBS was not a significant predictor; however immigration predicted the decline, indicating that high levels of immigration promote the anti-Flynn effect. Among the interactions there was a negative effect of the Immigration × g-ness interaction, indicating that immigration promotes IQ decline the most when the measure is higher in g-ness. The model accounted for 37.1% of the variance among the observations. (PsycINFO Database Record (c) 2017 APA, all rights reserved)

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Tuesday, November 7, 2017

The SCOTUS Lineup on the Death Penalty

The SCOTUS Lineup on the Death Penalty
// Crime and Consequences Blog

The Supreme Court today announced a unanimous per curiam opinion in Dunn v. Madison.  I'll repeat the Heritage Foundation's summary of the case:

[T]he Court reversed a decision of the Eleventh Circuit in an Antiterrorism and Effective Death Penalty Act (AEDPA) case. AEDPA provides that a state prisoner is entitled to federal habeas relief only if the state trial court's adjudication of the prisoner's claim "was contrary to, or involved an unreasonable application of, clearly established Federal law." In this case, an Alabama trial court sentenced Vernon Madison to death for murdering a police officer. Awaiting execution, Madison suffered several strokes and petitioned for habeas, asserting that he had become incompetent to be executed. Experts testified that although Madison could not remember the "sequence of events from the offense to his arrest to the trial or any of those details," he did understand he was "tried and imprisoned for murder and that Alabama will put him to death as punishment for that crime." The district court denied Madison's petition but the Eleventh Circuit reversed. Today, the Supreme Court reversed, holding that no Supreme Court precedent has "'clearly established' that a prisoner is incompetent to be executed because of a failure to remember his commission of the crime, as distinct from a failure to rationally comprehend the concepts of crime and punishment as applied in his case."


Ginsburg, joined by Breyer and Sotomayor concurred, writing that while AEDPA precludes consideration of the question in this case, the question of "whether a State may administer the death penalty to a person whose disability leaves him without memory of him commission of a capital offense" "warrant[s] full airing." Breyer also concurred, writing separately to (once again) call into question the "unconscionably long periods of time that prisoners often spend on death row awaiting execution."


Perhaps the more interesting topic here is trying to read the tea leaves on the current Supreme Court lineup on the death penalty.  Up to now, it's been reasonably clear that there are four votes in favor (Roberts, Thomas, Alito and Gorsuch) and two against (Ginsburg and Breyer) (in my first edition, I mistakenly said Ginsburg and Kennedy.  I thank Doug Berman for his catching this).  There has been some doubt about the other three.  I now want to hazard my guess.

Although Justice Sotomayor very conspicuously did not join Justice Breyer's "unconstitutional-in-all-circumstances" Glossip dissent, her views since then seem to me to signal that she will do so in the near future.  Both her language and, so to speak, her body language, tell me she's going to "evolve."

Justice Kennedy is a different matter entirely.  There was ample reason to suspect, given his language in Kennedy v. Louisiana and Roper v. Simmons, that, a few years ago, he was moving in an abolitionist direction.  The fact that he did not write separately in Glossip, and fully joined Justice Alito's opinion for the Court holding point-blank that "the death penalty is constitutional" was, I thought, the single most important thing about that case.  His silence today is another good sign.  I now think it extremely unlikely that Justice Kennedy would vote to outlaw capital punishment, or even adopt any further restraints on its application.  

I'm not sure of the reasons for what I believe to be Justice Kennedy's firming up on this subject, but they might include (1) that the death penalty is inflicted less frequently now, (2) the existence of some high-profile cases like the Boston Marathon bomber and the Charleston church mass killer, where blanket opposition to the death penalty is difficult for a person with a normal conscience to maintain, and (3) Justice Kennedy's respect for precedent, which is not ambiguous on this subject.

This leaves Justice Kagan.  Her refusal to join today's concurrence pushes me to believe what I've been thinking for some time, to wit, that Justice Kagan will not vote to outlaw the death penalty in all circumstances.

Justice Kagan said at her confirmation hearing that she regarded capital punishment as "settled law going forward."  Her actions since they tell me that she is, as I always thought, a person of her word.  It's also very encouraging to see that Justice Kagan draws a sharp line between her personal policy views (which I suspect disapprove the death penalty) and her role as a jurist to follow the law.

Accordingly, I think the current lineup against abolition is 6-3.  Of course it's possible that some of the older Justices (Ginsburg, Kennedy and Breyer) may leave the Court in the next two or three years.  It is, not to put too fine a point on it, inconceivable that President Trump would name a justice opposed to the Court's current view as set forth in Glossip.


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Sunday, October 29, 2017

Meta-analysis supports cognitive ability differentiation hypotheses (SLODOR)


The cognitive ability differentiation hypothesis, which is also termed Spearman's Law of Diminishing Returns, proposes that cognitive ability tests are less correlated and less g loaded in higher ability populations. In ad-dition, the age differentiation hypothesis proposes that the structure of cognitive ability varies across respondent age. To clarify the literature regarding these expectations, 106 articles containing 408 studies, which were published over a 100-year time span, were analyzed to evaluate the empirical basis for ability as well as age differentiation hypotheses. Meta-analyses provide support for both hypotheses and related expectations. Results demonstrate that the mean correlation and g loadings of cognitive ability tests decrease with increasing ability, yet increase with respondent age. Moreover, these effects have been nearly constant throughout the century of analyzed data. These results are important because we cannot assume an invariant cognitive structure for dif-ferent ability and age levels. Implications for practice as well as drawbacks are further discussed.

Thursday, October 26, 2017

Federal Court Rules to Protect the Interest of Incompetent North Carolina Death-Row Exoneree

Federal Court Rules to Protect the Interest of Incompetent North Carolina Death-Row Exoneree
// Death Penalty Information Center

A federal judge has voided a contract that had provided Orlando-based attorney Patrick Megaro hundreds of thousands of dollars of compensation at the expense of Henry McCollum (pictured left, with his brother Leon Brown), an intellectually disabled former death-row prisoner who was exonerated in 2014 after DNA testing by the North Carolina Innocence Inquiry Commission showed that he had not committed the brutal rape and murder of a young girl for which he had been wrongly convicted and condemned. McCollum and Brown—who both have IQs measured in the 50s and 60s—had been convicted in 1983 based on coerced false confessions that the brothers (aged 19 and 15 at the time) provided to interrogating officers. At the time of his exoneration, McCollum had spent 30 years on death row and was the state's longest serving death-row prisoner. Megaro became McCollum's and Brown's lawyer in March 2015, after two women who claimed to be advocating on behalf of the brothers persuaded them to fire the lawyers who had been representing them in their efforts to obtain compensation and to hire Megaro's firm. McCollum was awarded $750,000 in compensation from North Carolina in October 2015, at least half of which appears to have been paid to Megaro. Within seven months, McCollum was out of money and taking out high-interest loans that had been arranged and approved by Megaro. Megaro also negotiated a proposed settlement of the brothers' wrongful prosecution lawsuit in which he was to receive $400,000 of a $1 million payment to the brothers. Defense lawyer Ken Rose, who represented McCollum for 20 years and helped win McCollum's release from prison, provided testimony that two mental experts had previously found that McCollum was "not competent to provide a confession" and that McCollum remained "vulnerable to manipulation and control by others." After hearing additional evidence from experts and other witnesses, U.S. District Court Judge Terrence Boyle determined that, as a result of his intellectual disability, McCollum lacked knowledge and understanding of financial issues, "remains easily manipulated," and was "unable to make important decisions about his person and property." As a result, the court voided the contract between McCollum and Megano, including the fee arrangements. Raymond Tarlton, whom Judge Boyle appointed to serve as McCollum's guardian ad litem, said the decision "made clear that the same disabilities that led to Henry McCollum giving a false confession in 1983 made him vulnerable to be manipulated and controlled after release." The court also has appointed a guardian to protect the interests of Leon Brown. Judge Boyle ordered further briefing pending receipt of the guardian's report to assist in determining the status of the contract between Megaro and Brown.
(Judge nixes high attorney fees for NC man wrongly sentenced to death, Associated Press, October 24, 2017; J. Neff, Innocent, Disabled and Vulnerable, The Marshall Project, October 24, 2017; Editorial: Judge finally rules to benefit of half-brothers, The Robesonian, October 24, 2017.) Read the court's order. See Innocence and Intellectual Disability.
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Wednesday, October 25, 2017

CFA of WISC-V: A five factor CHC battery

There are dueling factor study articles regarding the WISC-V in the research literature. Here is the take of Reynolds and Keith, who, IMHO, tend to do some of the best factor structure research in intelligence testing.

The five factors look like clear Gc, Gv, Gf, Gwm and Gs CHC factors.


The purpose of this research was to test the consistency in measurement of Wechsler Intelligence Scale for Chil-dren-Fifth Edition (WISC-V; Wechsler, 2014) constructs across the 6 through 16 age span and to understand the constructs measured by the WISC-V. First-order, higher-order, and bifactor confirmatory factor models were used. Results were compared with two recent studies using higher-order and bifactor exploratory factor analysis (Canivez, Watkins, & Dombrowski, 2015; Dombrowski, Canivez, Watkins, & Beaujean, 2015) and two using con-firmatory factor analysis (Canivez, Watkins, & Dombrowski, 2016; Chen, Zhang, Raiford, Zhu, & Weiss, 2015). We found evidence of age-invariance for the constructs measured by the WISC-V. Further, both g and five distinct broad abilities (Verbal Comprehension, Visual Spatial Ability, Fluid Reasoning, Working Memory, and Processing Speed) were needed to explain the covariances among WISC-V subtests, although Fluid Reasoning was nearly equivalent to g. These findings were consistent whether a higher-order or a bifactor hierarchical model was used, but they were somewhat inconsistent with factor analyses from the prior studies. We found a correlation between Fluid Reasoning and Visual Spatial factors beyond a general factor (g) and that Arithmetic was primarily a direct indicator of g. Composite scores from the WISC-V correlated well with their corresponding underlying factors. For those concerned about the fewer numbers of subtests in the Full Scale IQ, the model implied relation between g and the FSIQ was very strong.

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Monday, October 23, 2017

SCOTUS orders Florida to reconsider Atkins case in light of Moore v Texas: Tavares Wright

The United States Supreme Court has ordered the Florida Supreme Court to reconsider a decision that had denied a death-row prisoner's claim that he was ineligible for the death penalty because he has Intellectual Disability. On October 16, the Court reversed and remanded the case of Tavares Wright (pictured, left), directing the Florida courts to reconsider his intellectual-disability claim in light of the constitutional standard the Court set forth in its March 2017 decision in Moore v. Texas.

More information can be found here.

Monday, October 9, 2017

"Neuroscience Nuance: Dissecting the Relevance of Neuroscience in Adjudicating Criminal Culpability"

"Neuroscience Nuance: Dissecting the Relevance of Neuroscience in Adjudicating Criminal Culpability"
// Sentencing Law and Policy

The title of this post is the title of this notable new paper authored by Christopher Slobogin. Even more than the title, the paper's abstract suggests it is a must-read for sentencing fans:

Most scholars who have written about the role of neuroscience in determining criminal liability and punishment take a stance somewhere between those who assert that neuroscience has virtually nothing to say about such determinations and those that claim it will upend the assumption that most choices to commit crime are blameworthy.  At the same time, those who take this intermediate position have seldom clarified how they think neuroscience can help. This article tries to answer that question more precisely than most works in this vein.  It identifies five types of neuroscience evidence that might be presented by the defense and discusses when that evidence is material under accepted legal doctrine.  It concludes that, even on the assumption that the data presented are accurate, much commonly proffered neuroscientific evidence is immaterial or only weakly material, not only at trial but also at sentencing. At the same time, it recognizes that certain types of neuroscience evidence can be very useful in criminal adjudication, especially at sentencing.


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Sunday, October 1, 2017

Law Review Article: Lucas (2017) An Empirical Assessment of Georgia's Beyond a Reasonable Doubt Standard to Determine Intellectual Disability in Capital Cases

This article can be found at this link.

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Atkins-related Court decision: Cathey v Davis (2017, Texas)

For some reason I failed to post the most recent court decision this past May regarding Cathey, a case where the Flynn effect (norm obsolescence) is prominent. This decision can now be found here. The court granted Cathey a district court hearing to present evidence regarding the Flynn effect in his Atkins claim. Prior Cathey related posts can be found here.

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Monday, September 25, 2017

Atkins related case: Wesely Coonce v USA Appellants Opening Brief

The opening appellant brief for the Atkin's related case of Wesley Coonce (Coonce v USA, 2016) is now available for viewing here.

Law Review Article (Meyer, 2017): The newly informed decency of death: Hall v Florida endorses the Marsshall hypothesis in eighth ammendment review of the death penalty

The above titled law review article (Meyer, 2017:  The newly informed decency of death:  Hall v Florida endorses the Marshall hypothesis in eighth amendment review of the death penalty can be found here.

Flynn effect reference project

I had previously maintained a "Flynn effect archive" project at this blog.  In its prior form, it included a reference list and hyperlinks to almost all articles.  I have now found it necessary to remove all posts (and index tag terms) related to that project.  It's purpose has changed.

Originally the idea was to make available most the available research on the Flynn effect.  Over time I noticed (via the hit counter tracker) that fewer and fewer people were consulting it to obtain copies of articles.  The time necessary to maintain the archive, especially after I switched domain servers (which resulted in a ton of obsolete and broken hyperlinks), was not cost-effective.  Thus, that archive is no longer available.

In its place I am now  maintaining (and will update periodically) a simple working list of Flynn effect (aka, norm obsolescence) references.  The current version, dated 09-17-17, can be downloaded by clicking here.  It includes 291 references.  I will refer to this as the Flynn Effect Reference Project.  I will update it on a regular basis, especially since it is now much easier to maintain.

The reference list should not be considered exhaustive of all possible published and unpublished research regarding the Flynn effect.  It is the best I can put together.  Any readers who locate missing articles, or new publications, should contact me via email (go to the MindHub and contact me via the contact info).  I will then add those to the next update.


Thursday, September 7, 2017

Evaluating WAIS–IV structure through a different psychometric lens: structural causal model discovery as an alternative to confirmatory factor analysis via BrowZine

Evaluating WAIS–IV structure through a different psychometric lens: structural causal model discovery as an alternative to confirmatory factor analysis
van Dijk, Marjolein J. A. M.; Claassen, Tom; Suwartono, Christiany; van der Veld, William M.; van der Heijden, Paul T.; Hendriks, Marc P. H.
The Clinical Neuropsychologist: Vol. 31 Issue 6-7 – 2017: 1141 - 1154


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Sharing The use of neuropsychological tests to assess intelligence via BrowZine

The use of neuropsychological tests to assess intelligence
Gansler, David A.; Varvaris, Mark; Schretlen, David J.
The Clinical Neuropsychologist: Vol. 31 Issue 6-7 – 2017: 1073 - 1086


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Sharing Psychometrics and statistics: two pillars of neuropsychological practice via BrowZine

Psychometrics and statistics: two pillars of neuropsychological practice
Hilsabeck, Robin C.
The Clinical Neuropsychologist: Vol. 31 Issue 6-7 – 2017: 995 - 999


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Saturday, August 26, 2017

The Intelligent Brain: One of the Great Courses on sale

The Intelligent Brain

1 What Is Intelligence? Probe the nature of intelligence by looking first at the phenomenon of savants—individuals who excel at a narrow mental skill. Does this qualify as…

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