Publications by authors named "Zachary C Merz"

Early detection of cognitive impairment is of paramount importance in clinical settings, with several brief screening tools having been developed for that purpose. The present study sought to evaluate the clinical utility of the Saint Louis University Mental Status examination (SLUMS) at identifying examinees with normal cognition, mild cognitive impairment, or dementia syndrome using the criterion of a comprehensive neuropsychological assessment. Two hundred sixty-three examinees ( age = 67.

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Objective: To examine whether middle-aged men who played high-school football experience worse mental health or cognitive functioning than men who did not play high-school football.

Design: Cross-sectional cohort study.

Setting: Online survey completed remotely.

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Within the neuropsychological assessment, clinicians are responsible for ensuring the validity of obtained cognitive data. As such, increased attention is being paid to performance validity in patients with multiple sclerosis (pwMS). Experts have proposed batteries of neuropsychological tests for use in this population, though none contain recommendations for standalone performance validity tests (PVTs).

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Objective: Research regarding performance validity tests (PVTs) in patients with multiple sclerosis (MS) is scant, with recommended batteries for neuropsychological evaluations in this population lacking suggestions to include PVTs. Moreover, limited work has examined embedded PVTs in this population. As previous investigations indicated that nonmemory-based embedded PVTs provide clinical utility in other populations, this study sought to determine if a logistic regression-derived PVT formula can be identified from selected nonmemory variables in a sample of patients with MS.

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Objective: Traditional reliable change index (RCI) methods may be psychometrically limited due to their inability to account for particularly high or low baseline performance and regression to the mean following serial testing. The current study sought to examine differences between RCI and standardized regression-based (RBz) methods in a cohort of adolescent athletes engaged in sport-related concussion recovery.

Methods: Consultation records and results of computerized testing data via the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) battery were retrospectively reviewed among 240 adolescent athletes involved in return-to-play protocols following a sport-related concussion.

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The purpose of this study was to determine if earlier age of first exposure to football is associated with worse brain health in middle-aged and older adult men who played high school football. Men from the United States, aged 35 and older, who reported playing high school football, completed a customized, online health survey via the Amazon Mechanical Turk (mTurk) platform. Survey items included physical, psychological, and cognitive symptoms over the past week and over the past year, sports participation history (including age of first exposure to football), medical history, and concussion history.

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There are no validated or agreed upon diagnostic clinical criteria for chronic traumatic encephalopathy or traumatic encephalopathy syndrome. This study examines the leading research criteria for traumatic encephalopathy syndrome (TES) in middle-aged men in the general population. Participants were 409 men between the ages of 35 and 55 recruited through an online crowdsourcing platform.

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The current study examined characteristics of the Structured Inventory of Malingered Symptomatology (SIMS) in a sample of 110 patients at an adult neuropsychology clinic. Subjects with especially high or low suspicion of invalid reporting were identified based on clinician-completed questions. SIMS elevation rates were examined at different cutoffs and between these groups and were correlated with other indicators of validity.

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Included in the most recent Diagnostic and Statistical Manual of Mental Disorders is the Level 1 Cross-Cutting Symptom Measure (CCSM), a self-report checklist with 23 items assessing 13 major psychiatric symptom clusters. To date, minimal literature has examined the factor structure of the CCSM and its utility identifying significant psychological distress, and existing studies pose notable limitations. Four hundred (400) American adults (M age = 34.

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The purpose of this study was to determine if earlier age of first exposure (AFE) to football is associated with worse brain health in middle-aged men who played high school football. We assessed 123 men 35-55 years of age, who played high school football, using (1) a survey of demographic information as well as medical, sport participation, and concussion history; (2) the Patient Health Questionnaire-8 (PHQ-8); and (3) the British Columbia Post-Concussion Symptom Inventory (BC-PSI). Sixty-two (50.

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Objective: Abbreviated and virtual neuropsychological assessment practices are growing in popularity and viable alternatives to traditional testing methods are needed, especially in the face of global health concerns. This study generated and examined short form (SF) full-scale IQ (FSIQ) estimations, which lend themselves to virtual test administration.

Methods: Archival data were procured from 318 concurrent cognitive evaluations at a university clinic.

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Introduction: Concern surrounding short- and long-term consequences of participation in contact sports has become a significant public health topic. Previous literature utilizing diffusion tensor imaging in sports-related concussion has exhibited notable variety of analysis methods and analyzed regions of interest, and largely focuses on acute effects of concussion. The current study aimed to compare diffusivity metrics across a single season within athlete cohorts with no history of concussion.

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Evaluating general cognitive ability (i.e., intelligence) is common in neuropsychological practice, and identifying abbreviated assessments of intelligence is often advantageous.

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Objective: The Wechsler Adult Intelligence Scale, 4th edition (WAIS-IV) is a commonly utilized cognitive battery across many clinical settings. However, due to various patient variables, an abbreviated assessment of intellectual abilities, may be clinically advantageous to allow for a more thorough assessment of other cognitive domains. The current study represents an attempt to propose additional short-form IQ estimations in an outpatient clinical sample.

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A review of the literature investigating the relationship between religion and spirituality and broad personality traits reveals methodological limitations. The present study sought to contribute to the present literature by investigating differences on personality traits among men and women who identified as either religious only (R), spiritual only (S), both spiritual and religious (B), or neither spiritual nor religious (N). One thousand thirty-seven (1037) adults (M age = 36.

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The Wechsler Adult Intelligence Scale, Fourth Edition (WAIS-IV) is a commonly administered battery for assessing intellectual and cognitive abilities. Despite its popularity, construct validation studies primarily utilize the WAIS-IV normative sample rather than ecologically-valid clinical samples. The current study expands the literature on the validity of WAIS-IV by testing a bifactor model in such a sample.

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: We sought to examine the relationship between personality traits and post-concussion symptom reporting in individuals with and without a self-reported history of concussion. : Data were collected via a cross-sectional electronic survey from 619 individuals via Amazon Mechanical Turk (mTurk). Participants completed a background demographic questionnaire, as well as both the Post-Concussion Symptom Scale (PCSS) and IPIP-NEO-120 personality inventory.

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Impulsivity reflects a pattern of rapid behavioral responses to internal or external cues with little planning or consideration of consequences. Impulsive personality is purported to be a largely stable, trait-based quality, while impulsive choice has been shown to respond to interventions aimed at reducing impulsivity. We sought to evaluate the stability of impulsive personality and examine reductions in impulsivity during short-term residential substance use disorder (SUD) treatment.

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Objective: Neurocognitive deficits commonly are an accompanying feature of Multiple Sclerosis (MS). A brief, yet comprehensive neuropsychological battery is desirable for assessing the extent of these deficits. Therefore, the present study examined the validity of the Mercy Evaluation of Multiple Sclerosis (MEMS) for use with the MS population.

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Objective: We sought to examine the construct validity of the Language Index of the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS).

Methods: Archival neuropsychological data were collected for 2,057 individuals of diverse neurological etiologies.

Results: Correlations were seen between the RBANS Language Index and its indices (Semantic Fluency r = .

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Objective: To assess whether increased incidence of post-traumatic stress disorder and depressive symptomatology in veterans with combat-related traumatic brain injury might help account for neurocognitive impairment relative to civilians with traumatic brain injury.

Participants: Neuropsychological assessment data of 53 Operation Enduring Freedom/Operation Iraqi Freedom veterans and 48 civilians with positive history of traumatic brain injury were analyzed to assess differences with respect to cognitive performance.

Design: Retrospective analysis of data including neurocognitive test performance and self-reported symptoms of post-traumatic stress disorder and depression.

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Article Synopsis
  • * Data were gathered from 380 participants using an online survey, assessing their accuracy in TBI-related knowledge, which resulted in a 61% correct response rate.
  • * Significant misconceptions were found regarding PCS and CTE, suggesting that poor education and misleading media contribute to these misunderstandings, highlighting the need for better communication and clarity in TBI-related information.
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Background: The reintegration to normal living index (RNLI) is a global assessment of patient quality of life often utilized in stroke populations. Previous studies in various general disability samples have consistently reported a two-factor solution for the RNLI. Despite its common use with stroke patients, the RNLI has not been psychometrically evaluated in an exclusively stroke sample.

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Objective: To investigate predictors of return to work (RTW) in a poststroke sample.

Design: Retrospective investigation of archival data from an inception cohort; acute care records and 6-month follow-up telephone interview data were obtained for analysis.

Setting: The Brain Recovery Core, a collaborative interinstitutional endeavor among an academic medical center, an acute care hospital, and a rehabilitation center.

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