Base rate data for the WAIS-R: Test-Retest stability and VIQ-PIQ differences

Matarazzo, Joseph D.; Herman, David O.

doi:10.1080/01688638408401227

Cited by 169 publications

(125 citation statements)

References 7 publications

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“…Matarazzo and Herman (1984) demonstrated that although a 10-point split may be reliable statistically, it is not statistically uncommon. That is, 38.8% of the normal population has a VIQ-PIQ split of 10 or more points.…”

mentioning

confidence: 96%

Base rates of WAIS‐R VIQ–PIQ differences in 1593 psychiatric inpatients

Woodward

Green

2001

J Clin Psychol

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The purpose of this study was to provide the psychologist with base-rate tables for the Wechsler Adult Intelligence Scale-Revised (WAIS-R) Verbal IQ-Performance IQ difference scores in 1593 psychiatric inpatients. Subtables also were provided for each of three primary psychiatric diagnoses (schizophrenia spectrum disorders, bipolar disorders, and depression). The base rates of VIQ-PIQ splits in the full inpatient sample, and those for the subsamples based on primary psychiatric diagnosis, were very similar to those reported in the WAIS-R standardization sample. Consistent with past research on the standardization sample, the VIQ-PIQ split was correlated positively with Full Scale IQ (FSIQ), indicating that larger splits are more common at the higher IQ levels. Therefore, base-rate tables also were provided for the total inpatient sample split into five IQ groupings.

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mentioning

confidence: 96%

Base rates of WAIS‐R VIQ–PIQ differences in 1593 psychiatric inpatients

Woodward

Green

2001

J Clin Psychol

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“…Only a sufficiently large and representative sample then can warrant a satisfactory approximation. In recent years, base rate information on change gathered within normative populations is being increasingly published Matarazzo & Herman, 1984;McSweeny et al, 1993;Temkin et al, 1999). The present article discusses three variants of estimating the standard error of the JT and the Chelune et al indices encountered in research reports.…”

Section: Discussionmentioning

confidence: 99%

The standard error in the Jacobson and Truax Reliable Change Index: The classical approach to the assessment of reliable change

Maassen

2004

J Int Neuropsychol Soc

113

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Researchers and clinicians using Jacobson and Truax's index to assess the reliability of change in patients, or its counterpart by Chelune et al., which takes practice effects into account, are confused by the different ways of calculating the standard error encountered in the literature (see the discussion started in this journal by Hinton-Bayre). This article compares the characteristics of (1) the standard error used by Jacobson and Truax, (2) the standard error of difference scores used by Temkin et al. and (3) an adaptation of Jacobson and Truax's approach that accounts for difference between initial and final variance. It is theoretically demonstrated that the last variant is preferable, which is corroborated by real data. (JINS, 2004, 10, 888-893.)

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“…[16][17][18][19] DSST score provides an integrative measure of visuomotor coordination, processing speed, and short-term memory. 20 It is possible that low DSST score denotes a deficit reflecting ''slowness'' of cognitive function, which might directly impact health to increase mortality risk (e.g., inability to follow medication schedules). 16 Alternatively, low DSST score may signal the presence of other health problems possibly outside the central nervous system itself, such as vascular or metabolic disease.…”

Section: Discussionmentioning

confidence: 99%

Data Mining Identifies Digit Symbol Substitution Test Score and Serum Cystatin C as Dominant Predictors of Mortality in Older Men and Women

Cummings

Sanders

Caserotti

et al. 2012

Rejuvenation Research

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Background: Characterization of long-term health trajectory in older individuals is important for proactive health management. However, the relative prognostic value of information contained in clinical profiles of nonfrail older adults is often unclear. Methods: We screened 825 phenotypic and genetic measures evaluated during the Health, Aging, and Body Composition Study (Health ABC) baseline visit (3,067 men and women aged 70-79). Variables that best predicted mortality over 13 years of follow-up were identified using 10-fold cross-validation. Results: Mortality was most strongly associated with low Digit Symbol Substitution Test (DSST) score (DSST < 25; 21.9% of cohort; hazard ratio [HR] = 1.87 -0.06) and elevated serum cystatin C ( ‡ 1.30 mg/mL; 12.1% of cohort; HR = 2.25 -0.07). These variables predicted mortality better than 823 other measures, including baseline age and a 45-variable health deficit index. Given elevated cystatin C ( ‡ 1.30 mg/mL), mortality risk was further increased by high serum creatinine, high abdominal visceral fat density, and smoking history (2.52 £ HR £ 3.73). Given a low DSST score ( < 25) combined with low-to-moderate cystatin C ( < 1.30 mg/mL), mortality risk was highest among those with elevated plasma resistin and smoking history (1.90 £ HR £ 2.02). Conclusions: DSST score and serum cystatin C warrant priority consideration for the evaluation of mortality risk in older individuals. Both variables, taken individually, predict mortality better than chronological age or a health deficit index in well-functioning older adults (ages 70-79). DSST score and serum cystatin C can thus provide evidence-based tools for geriatric assessment.

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Base rate data for the WAIS-R: Test-Retest stability and VIQ-PIQ differences

Cited by 169 publications

References 7 publications

Base rates of WAIS‐R VIQ–PIQ differences in 1593 psychiatric inpatients

Base rates of WAIS‐R VIQ–PIQ differences in 1593 psychiatric inpatients

The standard error in the Jacobson and Truax Reliable Change Index: The classical approach to the assessment of reliable change

Data Mining Identifies Digit Symbol Substitution Test Score and Serum Cystatin C as Dominant Predictors of Mortality in Older Men and Women

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