Journal of Clinical and Experimental Neuropsychology

Publisher: Taylor & Francis (Routledge)

Current impact factor: 2.08

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 2.083
2013 Impact Factor 2.158
2012 Impact Factor 1.862
2011 Impact Factor 2.133
2010 Impact Factor 1.805
2009 Impact Factor 1.885
2008 Impact Factor 2.184
2007 Impact Factor 1.691
2006 Impact Factor 1.59
2005 Impact Factor 1.689
2004 Impact Factor 1.367
2003 Impact Factor 1.273
2002 Impact Factor 1.333
2001 Impact Factor 1.014
2000 Impact Factor 1.067
1999 Impact Factor 1.265
1998 Impact Factor 1.367
1997 Impact Factor 1.317
1996 Impact Factor 1.201
1995 Impact Factor 1.585
1994 Impact Factor 2.156
1993 Impact Factor 2.821
1992 Impact Factor 1.814

Impact factor over time

Impact factor

Additional details

5-year impact 2.48
Cited half-life >10.0
Immediacy index 0.24
Eigenfactor 0.01
Article influence 0.78
Other titles Journal of clinical and experimental neuropsychology (Online)
ISSN 1744-411X
OCLC 42679018
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Taylor & Francis (Routledge)

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    • STM: Science, Technology and Medicine
    • Publisher last contacted on 25/03/2014
    • This policy is an exception to the default policies of 'Taylor & Francis (Routledge)'
  • Classification

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Introduction: Mild cognitive impairment is common in nondemented Parkinson disease patients (PD-MCI) and is considered as a risk factor for dementia (PDD). Recently, the Movement Disorder Society (MDS) published guidelines for PD-MCI, although the studies available are still limited. The aim of this work was to characterize PD-MCI and its progression to dementia. Moreover, the study variables could be considered as predictors for the progression of cognitive impairment. Method: The study included 43 patients with idiopathic PD (mean age = 59.19 years, SD = 9.64) and 20 healthy and neurologically normal controls (mean age = 60.85 years, SD = 12.26). The criteria proposed by the MDS Task Force were applied for the PD-MCI diagnosis. Follow-up assessments were conducted within six to eight years after the diagnosis of PD-MCI. Results: The results showed that 60.5% of the patients were diagnosed with PD-MCI when a comprehensive assessment was performed (MDS criteria Level 2), while 23.3% of the patients met MCI criteria when a brief assessment was used (MDS criteria Level 1). Multiple domain impairment was the most frequent impairment (96.2%). A total of 42.3% of PD-MCI patients had dementia in the follow-up study. Logistic regression showed that the Hoehn and Yahr stage and education significantly contributed to the prediction of PD-MCI. Moreover, the Hoehn and Yahr stage and memory domain significantly contributed to the prediction of dementia. Conclusions: The results of the study: (a) provide relevant data about the process of validation of the MDS PD-MCI criteria, (b) reinforce the hypothesis that PD-MCI is more frequent than previous studies showed without applying MDS criteria, and (c) confirm that PD-MCI is a risk factor for the onset of dementia. Finally, the study shows that neurological impairment, educational level and memory impairment were predictors for the progression of cognitive impairment.
    Journal of Clinical and Experimental Neuropsychology 11/2015; 38(1):1-11. DOI:10.1080/13803395.2015.1087465
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    ABSTRACT: Rey's Auditory Verbal Learning Test (RAVLT) is a widely used neuropsychological test to assess episodic memory. In the present study we sought to establish normative and discriminative validity data for the RAVLT in the elderly population using previously adapted learning lists for the Greek adult population. We administered the test to 258 cognitively healthy elderly participants, aged 60-89 years, and two patient groups (192 with amnestic mild cognitive impairment, aMCI, and 65 with Alzheimer's disease, AD). From the statistical analyses, we found that age and education contributed significantly to most trials of the RAVLT, whereas the influence of gender was not significant. Younger elderly participants with higher education outperformed the older elderly with lower education levels. Moreover, both clinical groups performed significantly worse on most RAVLT trials and composite measures than matched cognitively healthy controls. Furthermore, the AD group performed more poorly than the aMCI group on most RAVLT variables. Receiver operating characteristic (ROC) analysis was used to examine the utility of the RAVLT trials to discriminate cognitively healthy controls from aMCI and AD patients. Area under the curve (AUC), an index of effect size, showed that most of the RAVLT measures (individual and composite) included in this study adequately differentiated between the performance of healthy elders and aMCI/AD patients. We also provide cutoff scores in discriminating cognitively healthy controls from aMCI and AD patients, based on the sensitivity and specificity of the prescribed scores. Moreover, we present age- and education-specific normative data for individual and composite scores for the Greek adapted RAVLT in elderly subjects aged between 60 and 89 years for use in clinical and research settings.
    Journal of Clinical and Experimental Neuropsychology 11/2015; 38(1):1-17. DOI:10.1080/13803395.2015.1085496
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    ABSTRACT: Confabulation is often observed in amnesic patients after brain damage. However, evidence regarding the relationship between confabulation and other neuropsychological functions is scarce. In addition, previous studies have proposed two possibilities of the relationship between confabulation and false memory, in which patients with confabulation are likely to retrieve false memories, or confabulations are relatively independent of false memories. The present study investigated how confabulation is related to various cognitive functions, including orientation, attention, frontal lobe function, memory, and mental status, and to false memories, as assessed by the Deese-Roediger-Mcdermott (DRM) paradigm. Patients with organic amnesia participated, and confabulations were evaluated using the Confabulation Battery. Amnestic patients were classified into two groups: confabulating (CP) and nonconfabulating patients (NCP). The CP group was significantly impaired in time orientation, attention, and verbal memory, compared to the NCP group and age-matched healthy controls (HC). Results of the DRM paradigm revealed no significant difference in false memory retrieval induced by critical lures across CP, NCP, and HC groups. Confabulating responses in organic amnesia could be in part induced by disturbance of time consciousness and attention control in severe impairment of verbal memories, and confabulation and false memory could be modulated by different cognitive systems.
    Journal of Clinical and Experimental Neuropsychology 11/2015; DOI:10.1080/13803395.2015.1094027
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    ABSTRACT: Cognitive impairment in Parkinson's disease (PD) greatly affects the morbidity and mortality rates of the disease and can be present as mild executive dysfunction even in the early stages. In advanced PD, the prevalence of dementia (PDD) reaches more than 80%. The Movement Disorders Society (MDS) has proposed diagnostic criteria for PDD and Mild Cognitive Impairment (MCI) in PD, raising the sensibility and specificity of those diagnoses compared with DSM IV, for example. Cognition impairment is an important issue to determine in PD because of therapeutic, epidemiologic, and prognostic factors. These guidelines should be applied to a diagnosis of PD-MCI and PDD as soon as possible in order to provide a correct diagnosis. Another important topic to discuss regarding cognition in PD is which patient would be more likely to develop PDD. There are some risk factors for cognitive impairment in PD with cumulative risk. Important risk factors related to PDD are age, time of diagnosis, rigid-akinetic phenotype, severe impairment, impairment of semantic fluency, genetic factors, low education level, and postural instability. Recognizing them is also important for early diagnosis. We discuss the diagnostic criteria of PD cognitive impairment and some aspects of risk factors related to it in this review.
    Journal of Clinical and Experimental Neuropsychology 11/2015; 37(9):988-93. DOI:10.1080/13803395.2015.1073227
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    ABSTRACT: The present study sought to characterize and predict the recognition of emotional stimuli (presented in a visual or auditory modality) by patients with temporal lobe epilepsy (TLE). Fifty TLE patients and 50 matched controls performed two emotion recognition tasks (emotional faces and emotional bursts). Neutral stimuli were also presented, and emotional biases were monitored by analyzing errors. Demographic, cognitive, psychobehavioral and (in TLE patients only) clinical and quality of life data were also recorded. Compared with controls, TLE patients were impaired in the recognition of fear expressions in both visual and auditory modality tasks. However, impairments in the two channels were not always concomitant on the individual level. In the visual modality, recognition of disgust and neutral expressions was significantly worse in TLE patients. In the auditory modality, nonsignificant trends toward poor recognition of disgust and neutral expressions were observed. Negative biases were noted in TLE patients; expressions of fear (faces and bursts) were more frequently misinterpreted as disgust, and neutral facial expressions were more frequently misinterpreted as sadness. Impairments in the recognition of facial fear were less pronounced in left TLE patients who (according to structural magnetic resonance imaging, MRI) did not have any brain lesions. In TLE patients, low levels of social support (a quality of life parameter) were associated with worse recognition of facial disgust, and higher levels of apathy were associated with better recognition of neutral faces. TLE patients are impaired in some aspects of emotion recognition with both visual and auditory stimuli, although the differential impact of TLE on these modalities requires further research. These emotional impairments are related to quality of life and psychobehavioral parameters.
    Journal of Clinical and Experimental Neuropsychology 11/2015; 37(9):931-45. DOI:10.1080/13803395.2015.1068280
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    ABSTRACT: Vascular cognitive impairment (VCI) refers to the entire spectrum of cognitive dysfunction attributable to vascular changes in the brain. The objective of this study is to evaluate magnetic resonance imaging (MRI) correlates of performance on the National Institute of Neurological Disorders and Stroke-Canadian Stroke Network (NINDS-CSN) VCI neuropsychology protocols. Fifty ischemic stroke patients and 50 normal elderly persons completed the VCI protocols and MRI. Relationships between the four cognitive domains (executive/activation, language, visuospatial, and memory) and three protocol (60-, 30-, and 5-min) summary scores with MRI measures of volumes of white matter hyperintensities (WMH) and global brain and hippocampal atrophy were assessed using linear regression. All cognitive domain scores were associated with WMH volume and, with the exception of language domain, with global atrophy. Additional relationships were found between executive/activation and language domains with left hippocampal volume, visuospatial domain with right hippocampal volume, and memory domain with bilateral hippocampal volumes. All protocol summary scores showed comparable relationships with WMH and hippocampal volumes, with additional relationships found between the 60- and 30-min protocols with global brain volume. Performance on the NINDS-CSN VCI protocols reflects underlying volumetric brain changes implicated in cognitive dysfunctions in VCI.
    Journal of Clinical and Experimental Neuropsychology 11/2015; 37(9):1004-12. DOI:10.1080/13803395.2015.1038983
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    ABSTRACT: Huntington's disease (HD) is a genetic, neurodegenerative disease that affects cognitive, psychiatric and motor functioning. Frontal subcortical circuits are impacted by disease pathology, resulting in frontally mediated behavioral dysfunction. The purpose of this study was (a) to examine the relationship between both patient and informant reports of frontally mediated behaviors and disease progression and (b) to determine rate of agreement between patient and informant reports of these behaviors in relation to disease progression. Twenty-six HD patients and their informants participated in the study at the University of South Florida. Patient-informant pairs completed the Frontal Systems Behavior Scale (FrSBe) Self and Family ratings forms, respectively. UHDRS (Unified Huntington's Disease Rating Scale) motor scores were obtained from medical records as an index of disease progression. Only informant report of frontally mediated behaviors of apathy, disinhibition, and executive dysfunction was related to neurological examination results. On average, ratings by patients with less severe motor symptoms were comparable to informant ratings, suggesting intact awareness of deficits. In contrast, ratings of patients with more severe motor symptoms were discrepant from informant data, with informants providing more severe ratings than patients. HD patients may show intact awareness of frontally mediated behaviors in less severe stages but become increasingly unaware in more severe stages of the disease. This underscores the importance of clinical decisions regarding patient versus informant report at various stages of the disease.
    Journal of Clinical and Experimental Neuropsychology 11/2015; 37(9):981-7. DOI:10.1080/13803395.2015.1073226
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    ABSTRACT: The tendency to reproduce figures close to or superimposed on the model in copying tasks, the so-called Closing-in (CI) phenomenon, has been rarely reported in individuals affected by Parkinson's disease and associated dementia (PD-D). We aimed to comprehend the genesis of CI in PD-D individuals by assessing whether reduction of attention/executive resources can increase the tendency to deviate toward the model. Thirty PD-D individuals underwent a neuropsychological evaluation exploring visuo-spatial, visuo-constructional, executive and memory abilities. An experimental copying task was employed in single and in two dual task conditions to assess whether a (verbal) cognitive load can increase CI in these individuals, compared with a matched sample of healthy adults. CI occurred in 19/30 (63.3%) PD-D individuals: 4 of them produced copies close to the model (near-CI), whereas 15 individuals also superimposed their copies on the model (adherent-CI) besides showing near-CI. Presence of CI in PD-D individuals was significantly correlated with executive dysfunction but not with general cognitive impairment. In the experimental copying task the tendency to deviate toward the model was strongly correlated with executive dysfunction, and significantly increased when PD-D individuals were engaged in dual-task compared with single task conditions. Some individuals attempted to counteract CI, but this trend significantly decreased in dual-task compared with the single task conditions. In healthy adults the drift toward the model was significantly smaller than in PD-D individuals; in dual-task conditions healthy adults only showed a significant decrease in their ability to compensate for this drift. In PD-D individuals the tendency to deviate toward a salient model is strongly enhanced by a concurrent cognitive load. Such preliminary findings would suggest a relationship between reduction of executive attentional resources and the genesis of CI in PD-D individuals.
    Journal of Clinical and Experimental Neuropsychology 10/2015; 37(9):946-955. DOI:10.1080/13803395.2015.1071339
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    ABSTRACT: It is unclear whether carotid revascularization can improve the cognitive problems often observed in patients with carotid stenosis. We examined the presence of preoperative disturbances and the effects of different types of carotid revascularization on cognition. Forty-six patients treated for significant carotid stenosis [26 carotid endarterectomy (CEA), 10 transfemoral carotid stenting with distal filters (CASdp), and 10 transcervical stenting with flow reversal (CASfr)] as well as a matched control group of 26 vascular patients without carotid stenosis were included. Patients and controls were tested 1 day preoperatively and 1, 6, and 12 months after surgery on 18 neuropsychological variables. A significant amount of carotid patients as well as vascular controls showed cognitive defects at preoperative testing. None of the neuropsychological variables showed significant group differences between CEA, CASdp, CASfr, and controls, and only 1 revealed interaction between type of revascularization and improvements over time, though this effect dissolved when 2 outliers were excluded. Thirteen of 18 variables showed improved scores over time, regardless of the group. Compared with controls, about 10% of patients showed improvements, while 20% showed cognitive deterioration 6 months after revascularization. Results show similar effects for CEA, CASdp, and CASfr on cognition. Large practice effects due to repeated testing confirm the importance of using control groups in prospective cognition studies. Because of the small sample size, this study should be regarded as an exploratory study; larger studies on the cognitive consequences of carotid revascularization remain warranted.
    Journal of Clinical and Experimental Neuropsychology 10/2015; 37(8):834-41. DOI:10.1080/13803395.2015.1060952
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    ABSTRACT: Some of the behavioral disorders associated with Parkinson's disease (PD), such as the reduced magnitude of actions (hypometria) may be related to an impairment in cognitive disengagement. A reduced ability to disengage attention from previous sensory stimuli will alter perception with a reduced range of estimated stimulus magnitudes (contraction to the mean). To test this disengagement hypothesis, participants with PD were tested to learn whether they had abnormal sensory perception with overestimation of the relative magnitude of weaker tactile stimuli and underestimation of the relative magnitude of stronger tactile stimuli in relation to a reference stimulus. The participants were 12 people with PD and 12 healthy adults. Test stimuli were applied to the palm using Semmes-Weinstein monofilaments (SWM) of 6 magnitudes, 3 greater and 3 less than a standard stimulus. In each trial, after being stimulated with the reference (standard) stimulus, a test monofilament was applied, and the participant was asked to provide a numerical estimate of the magnitude of the second stimulus relative to the standard. Compared to the control group, participants with PD overestimated the magnitudes of the tactile stimuli below the standard stimulus and underestimated the magnitudes of stimuli above the standard stimulus. These results demonstrate that people with PD likely have a reduced ability to estimate the relative magnitudes of tactile sensory stimuli. Whereas deafferentation would alter perception in one direction, the impairment of these participants with PD may result from a disorder of disengagement, and disorders of disengagement are often due to frontal-executive dysfunction.
    Journal of Clinical and Experimental Neuropsychology 10/2015; 37(8):808-15. DOI:10.1080/13803395.2015.1060951
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    ABSTRACT: In most right-handed people, the left hemisphere is dominant for programming the temporal and spatial "how" (praxis) aspects of purposeful skilled movements, and the right hemisphere is dominant for control of the intentional "when" aspects of actions that mediate initiation, persistence, termination, and inhibition. Since the interhemispheric axons of the corpus callosum are especially susceptible to shearing from torsional forces during traumatic brain injury (TBI), the goal of this study was to learn whether participants with a history of severe traumatic brain injury demonstrate three types of cognitive-motor impairments that may result from callosal injury: ideomotor apraxia of the left hand, limb kinetic apraxia of the left hand, and hypokinesia of the right hand in response to left hemispatial stimuli. Nine participants with severe TBI and nine healthy control participants were studied for the presence of ideomotor apraxia, limb kinetic apraxia, and hypokinesia. When compared to the control participants, the participants with TBI revealed ideomotor apraxia and limb kinetic apraxia of the left hand and hypokinesia in response to left-sided visual stimuli when tested with the right hand. TBI appears to cause unilateral disorders of cognitive-motor functions. Future research is needed to understand how these cognitive-motor disorders are related to interhemispheric disconnection most likely induced by injury to the corpus callosum.
    Journal of Clinical and Experimental Neuropsychology 09/2015; 37(10):1-12. DOI:10.1080/13803395.2015.1077930
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    ABSTRACT: Bipolar disorder (BD) is considered a highly heritable disorder. Several cognitive endophenotypes, such as executive functions and verbal memory, have been suggested. A key component of executive functioning is inhibition, a complex construct consisting of various subtypes. Only some of these subtypes have been investigated in BD participants and their relatives. Recent findings suggest that difficulties with more basic functions such as processing speed may account for some of the deficits observed in BD. This possibility has not been explored for inhibitory functions. The current study investigated interference, behavioral and cognitive inhibition, and set-shifting in 36 BD participants, 24 of their unaffected first-degree relatives, and 40 healthy controls. We first used analysis of variance to assess group differences. This was followed by a second analysis in which we controlled for age and processing speed. Group performances after adjustment for age and processing speed were similar in tasks assessing interference and inhibition. However, shifting to a different task set required more time in BD participants than in controls even after adjustment for age and processing speed. BD relatives appeared to show a similar slowing but findings did not reach significance. The findings suggest that responses to interference and inhibitory functions may be preserved in BD participants; however, set-shifting abilities appear to be impaired in BD participants and may be affected in their relatives. Our findings further underline the importance of adjusting for more basic functions such as processing speed when evaluating neuropsychological functions.
    Journal of Clinical and Experimental Neuropsychology 09/2015; 37(10):1-12. DOI:10.1080/13803395.2015.1081157