Estimating premorbid intelligence Comparison of traditional and contemporary methods across the intelligence continuum

Abstract

The present investigation compared the North American Adult Reading Test (NAART), Wide Range Achievement Test-3 (WRAT-3) Reading subtest, Barona, and Oklahoma Premorbid Intelligence Estimate Best (OPIE) premorbid intelligence estimates in 64 chronic pain patients across three intelligence ranges. Results for the entire sample revealed that the NAART, Barona, and OPIE Best equations overestimated Wechsler Adult Intelligence Scale-Revised Full Scale IQ (WAIS-R FSIQ), while the WRAT-3 underestimated FSIQ. When the sample was divided into three intelligence ranges, the OPIE more accurately classified individuals with above average intelligence, while the WRAT-3 more accurately classified individuals with below average intelligence. Three methods (NAART, OPIE, and WRAT-3) provided relatively equivalent classifications of individuals in the average intelligence range. The Barona method tended to systematically under- and overestimate FSIQ across the intelligence continuum. These results suggest the potential utility of using different estimation methods for individuals in different IQ ranges, and speak to the need for development of estimation methods that incorporate current reading ability with best performance and demographic variables.

Long-term persistence of vaccine-derived aluminum hydroxide is associated with chronic cognitive dysfunction

“…However, analysis subtest by subtest showed that patients performed better at vocabulary subtest, which estimates pre-morbid intellectual ability [16], than at letter-number sequencing subtest, which depends on current functioning. Such a discrepancy unmasks alteration of actual intellectual functioning in MMF patients, hidden by the seemingly normal results [17][18][19]. Ad hoc neuropsychological battery provided precise depiction of MMF-associated cognitive dysfunction (MACD).…”

Cognitive and Psychological Factors Associated with Early Posttreatment Functional Outcomes in Breast Cancer Survivors

“…Of note, while verbal fluency is often considered a component of executive functioning because it can be associated with frontal lobe lesions (e.g., Miceli, Caltagirone, Gainotti, Masullo, & Silveri, 1981; Stuss et al, 1998), an a priori decision was made to separate this from other executive functioning measures based on clinical observations that word-finding deficits are one of the most common complaints reported in the cancer treatment centers where this study occurred. Finally, in line with neuropsychological theory and research (e.g., Griffin, Mindt, Rankin, Ritchie, & Scott, 2002; Kareken, Gur, & Saykin, 1995; Lezak, 1995), the Wide Range Achievement Test-3 (WRAT-3) Reading subtest (Wilkinson, 1993) was included as an estimate of overall premorbid functioning. In general, this battery was designed to evaluate a broad range of cognitive domains, and the specific selection of tests was based on neuropsychological batteries used in prior research with cancer patients (e.g., Ahles et al, 2002; Meyers et al, 1995; van Dam et al, 1998;).…”

Refined measure of functional connectomes for improved identifiability and prediction

“…While some reservations remain, the WRAT is still an effective method to estimate intelligence quotient (IQ) values (Griffin, Mindt, Rankin, Ritchie, & Scott, 2002). Note that not all participants have these three paradigms of data.…”

“…In this study, we relied on the performance scores (ratio of total correct responses) from the wide range achievement test (WRAT), which assessed the general learning ability (such as reading recognition, spelling, and arithmetic computation). While some reservations remain, the WRAT is still an effective method to estimate intelligence quotient (IQ) values (Griffin, Mindt, Rankin, Ritchie, & Scott, 2002).…”