The Portland Digit Recognition Test (PDRT) is a neuropsychological measure of motivation. In an extension of previous work, we report PDRT data on 120 patients with brain dysfunction who had no financial incentives for their performance. Percentile distributions, sensitivity and specificity data, and cognitive and demographic correlates are reported. Age, race, and etiology of brain dysfunction (traumatic or nontraumatic) were unrelated to PDRT performance. Education level was significantly related to PDRT scores. Although IQ and verbal memory performance were related to PDRT scores, the PDRT cutoff scores appear valid for brain dysfunction patients with severe cognitive dysfunction.
Get full access to this article
View all access options for this article.
References
1.
BinderL. M. (1990). Malingering following minor head trauma. The Clinical Neuropsychologist, 4, 25–36.
2.
BinderL. M. (1992). Malingering and deception. In PuenteA.McCaffreyR. (Eds.), Handbook of neuropsychological assessment: A biopsychosocial perspective (pp. 353–374). New York: Plenum.
3.
BinderL. M. (1993a). Assessment of malingering after mild head trauma with the Portland Digit Recognition Test. Journal of Clinical and Experimental Neuropsychology, 15, 170–183.
4.
BinderL. M. (1993b). An abbreviated form of the Portland Digit Recognition Test. The Clinical Neuropsychologist, 7, 104–107.
5.
BinderL. M. (1993c). Portland Digit Recognition Test manual (2nd ed.). Portland: Author.
6.
BinderL. M.WillisS. C. (1991). Assessment of motivation after financially compensable minor head trauma. Psychological Assessment, 3, 175–181.
7.
DikmenS. S.LevinH. S. (1993). Methodological issues in mild head injury. Journal of Head Trauma Rehabilitation, 8, 30–37.
8.
FrederickR. I.SarfatyS. D.JohnstonJ. D.PowelJ. (1994). Validation of a detector of response bias on a forced-choice test of nonverbal ability. Neuropsychology, 8, 118–125.
9.
GreiffensteinM.BakerW. J.GolaT. (1994). Validation of malingered amnesia measures with a large clinical sample. Psychological Assessment, 6, 218–224.
10.
GreiffensteinM.GolaT.BakerW. J. (1995). MMPI-2 validity scales versus domain specific measures in detection of factitious traumatic brain injury. The Clinical Neuropsychologist, 9, 230–240.
11.
GuilmetteT. J.WhelihanW.SparadeoF. R.BuongiornoG. (1994). Validity of neuropsychological test results in disability evaluations. Perceptual and Motor Skills, 78, 1179–1186.
12.
LevinH. S. (1989). Neurobehavioral outcome of mild to moderate head injury. In HoffJ.AndersonT.ColeT. (Eds.), Mild to moderate head injury (pp. 153–185). Boston: Blackwell Scientific Publications.
13.
LevinH. S. (1990). Predicting the neurobehavioral sequelae of closed head injury. In WoodR. L. (Ed.), Neurobehavioral sequelae of traumatic brain injury (pp. 89–109). New York: Taylor & Francis Ltd.
14.
LezakM. (1995). Neuropsychological assessment (3rd ed.), New York: Oxford University Press.
15.
PrigatanoG.AminK. (1994). Digit Memory Test: Unequivocal cerebral dysfunction and suspected malingering. Journal of Clinical and Experimental Neuropsychology, 15, 537–546.
16.
RogersR. (1988). Current status of clinical methods. In RogersR. (Ed.), Clinical assessment of malingering and deception (pp. 293–308). New York: Guilford.
17.
SlickD.HoppG.StraussE.HunterM.PinchD. (1994). Detecting dissimulation: profiles of simulated malingerers, traumatic brain-injury patients, and normal controls on a revised version of Hiscock and Hiscock's Forced-Choice Memory Test. Journal of Clinical and Experimental Neuropsychology, 16, 472–481.
18.
SpreenO.StraussE. (1991). A compendium of neuropsychological tests.New York: Oxford University Press.
19.
StussD. T.StethemL. L.HugenholtzH.RichardM. T. (1989). Traumatic brain injury: A comparison of three clinical tests, and analysis of recovery. The Clinical Neuropsychologist, 3, 145–156.
20.
YoungjohnJ. R.BurrowsL.ErdalK. (1995). Brain damage or compensation neurosis? The controversial post-concussion syndrome. The Clinical Neuropsychologist, 9, 112–123.
21.
WechslerD. (1981). WAIS-R manual.San Antonio, TX: The Psychological Corporation.
22.
WigginsE. C.BrandtJ. (1988). The detection of simulated amnesia. Law and Human Behavior, 12, 57–78.
