Justin Karr

jeka230's picture
  • Assistant Professor
  • Psychology
  • Clinical Psychology
012D Kastle Hall
859-257-2258
Research Interests:
Education
Postdoctoral Fellowship, Harvard Medical School, Spaulding Rehabilitation Hospital, and Massachusetts General Hospital (2018-2020)
Ph.D., University of Victoria (2018)
Doctoral Internship, Veterans Affairs Puget Sound Health Care System, Seattle Division (2017-2018)
M.Sc., University of Victoria (2013)
B.S., Western Oregon University (2011)
Biography

I will NOT be reviewing applications for the 2023/2024 academic year. If you are interested in attending the UK Clinical Psych PhD program and have interest in Clinical Neuropsychology training, you can review the Clinical Neuropsychology Concentration webpage, which has other possible mentors listed. You should review their webpages or contact them individually to see if any may be considering accepting a student for a Fall 2023 admission.

My philiosophy toward student mentorship is one of respect, collegiality, and support, as you develop towards your professional goals. I receive multiple requests to meet and clarify future reserach goals from prospective applicants. Although I love hearing about your interest in UK and our ongoing reserach, I recommend you review my recent publications below to learn about the direction of my lab. I am unavailable to meet or chat by phone with prospective applicants.

I began as an Assistant Professor of Clinical Neuropsychology in the Department of Psychology at the University of Kentucky in August 2020. Originally from Portland, Oregon, I completed my undergraduate studies in psychology at Western Oregon University and moved north to British Columbia, Canada for my graduate studies. I completed my Ph.D. in Clinical Psychology with a Neuropsychology Specialization at the University of Victoria in 2018, where my doctoral studies and research were supported by the Vanier Scholarship. I completed my clinical internship year at the Seattle VA hospital, and my postdoctoral training within the Harvard Medical School system at Spaulding Rehabilitation Hospital and Massachusetts General Hospital.

My research to date has focused on neuropsychological assessment methods, cross-cultural validation of psychological tests, cognitive aging, and the psychological and cognitive sequelae of brain injury. I have been privileged, in my short career, to work with researchers in the United States, Canada, Colombia, Ghana, Taiwan, Finland, Norway, and Australia, and I am always interested in working with new collaborators. Please reach out if we have shared interests.

In my non-academic life, I enjoy travelling to new places, trying new restaurants, running, golfing (poorly), and exploring the great outdoors. Having lived in Portland, Seattle, Victoria, BC, and Boston, I have, regrettably, become a coffee snob, although Tim Hortons (Canadian chain for those unfamiliar) will always have a special place in my heart.

PubMed Publications*: 
  • Karr, JE ;Mindt, MR ;Iverson, GL "A Multivariate Interpretation of the Spanish-Language NIH Toolbox Cognition Battery: The Normal Frequency of Low Scores." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists 37, 2 (2022): 338-351. Details. Full text
  • Karr, JE ;White, AE "Academic self-efficacy and cognitive strategy use in college students with and without depression or anxiety." Journal of American college health : J of ACH (2022): 1-7. Details. Full text
  • Karr, JE ;Scott, TM ;Aghvinian, M ;Mindt, Rivera "Harmonization of the English and Spanish versions of the NIH Toolbox Cognition Battery crystallized and fluid composite scores." Neuropsychology (2022): Details.
  • Karr, JE "Compensatory Cognitive Strategy Use by Young Adults: A Psychometric Evaluation of Self-Report Measures." Assessment 29, 3 (2022): 441-454. Details. Full text
  • Karr, JE ;Williams, MW ;Iverson, GL ;Huang, SJ ;Yang, CC "Pre-Injury headache and post-traumatic headache in patients with mild traumatic brain injury: neuropsychological, psychiatric, and post-concussion symptom outcomes." Brain injury 36, 2 (2022): 175-182. Details. Full text
  • Maja, RA ;Kilshaw, RE ;Garcia-Barrera, MA ;Karr, JE "Current Posttraumatic Stress Symptoms Mediate the Relationship Between Adverse Childhood Experiences and Executive Functions." Psychological reports 125, 2 (2022): 763-786. Details. Full text
  • Karr, JE ;Rodriguez, JE ;Goh, PK ;Martel, MM ;Rast, P "The unity and diversity of executive functions: A network approach to life span development." Developmental psychology 58, 4 (2022): 751-767. Details. Full text
  • Segerstrom, SC ;Reed, RG ;Karr, JE "Cytomegalovirus and Toxoplasma Gondii Serostatus Prospectively Correlated With Problems in Self-Regulation but not Executive Function Among Older Adults." Psychosomatic medicine 84, 5 (2022): 603-611. Details. Full text
  • Cook, NE ;Karr, JE ;Iverson, GL "Children with ADHD Have a Greater Lifetime History of Concussion: Results from the ABCD Study." Journal of neurotrauma 39, 1-2 (2022): 86-92. Details. Full text
  • Karr, JE ;Kibby, MY ;Jagger-Rickels, AC ;Garcia-Barrera, MA "Sensitivity and Specificity of an Executive Function Screener at Identifying Children With ADHD and Reading Disability." Journal of attention disorders 25, 1 (2021): 134-140. Details. Full text
  • Karr, JE ;Iverson, GL ;Isokuortti, H ;Kataja, A ;Brander, A ;Öhman, J ;Luoto, TM "Preexisting conditions in older adults with mild traumatic brain injuries." Brain injury 35, 12-13 (2021): 1607-1615. Details. Full text
  • Karr, JE ;Garcia-Barrera, MA ;Marsh, JM ;Maxwell, BA ;Berkner, PD ;Iverson, GL "Preseason Baseline Neurocognitive Performances and Symptom Reporting on Immediate Post-Concussion Assessment and Cognitive Testing: A Comparison of Adolescent Student-Athletes Tested in Spanish and English." Journal of athletic training 56, 8 (2021): 879-886. Details. Full text
  • Karr, JE ;Mindt, Rivera ;Iverson, GL "Interpreting reliable change on the Spanish-language NIH toolbox cognition battery." Applied neuropsychology. Adult (2021): 1-9. Details. Full text
  • Karr, JE ;Mindt, MR ;Iverson, GL "Assessing Cognitive Decline in High-Functioning Spanish-Speaking Patients: High Score Base Rates on the Spanish-Language NIH Toolbox Cognition Battery." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists (2021): Details. Full text
  • Raudeberg, R ;Karr, JE ;Iverson, GL ;Hammar, Å "Examining the repeatable battery for the assessment of neuropsychological status validity indices in people with schizophrenia spectrum disorders." The Clinical neuropsychologist (2021): 1-18. Details.
  • Iverson, GL ;Karr, JE ;Hong, Y ;Yang, CC ;Maxwell, B ;Berkner, PD "Baseline preseason ImPACT<sup>®</sup> testing in Mandarin with adolescent student-athletes in the United States." Applied neuropsychology. Child (2021): 1-11. Details. Full text
  • Karlsen, RH ;Saksvik, SB ;Stenberg, J ;Lundervold, AJ ;Olsen, A ;Rautio, I ;Folvik, L ;Håberg, AK ;Vik, A ;Karr, JE ;Iverson, GL ;Skandsen, T "Examining the Subacute Effects of Mild Traumatic Brain Injury Using a Traditional and Computerized Neuropsychological Test Battery." Journal of neurotrauma 38, 1 (2021): 74-85. Details. Full text
  • Karr, JE ;Iverson, GL ;Huang, SJ ;Silverberg, ND ;Yang, CC "Perceived Change in Physical, Cognitive, and Emotional Symptoms after Mild Traumatic Brain Injury in Patients with Pre-Injury Anxiety or Depression." Journal of neurotrauma 37, 10 (2020): 1183-1189. Details. Full text
  • Karr, JE ;Garcia-Barrera, MA ;Holdnack, JA ;Iverson, GL "The Other Side of the Bell Curve: Multivariate Base Rates of High Scores on the Delis-Kaplan Executive Function System." Journal of the International Neuropsychological Society : JINS 26, 4 (2020): 382-393. Details. Full text
  • Karr, JE ;Iverson, GL ;Williams, MW ;Huang, SJ ;Yang, CC "Complicated versus uncomplicated mild traumatic brain injuries: A comparison of psychological, cognitive, and post-concussion symptom outcomes." Journal of clinical and experimental neuropsychology 42, 10 (2020): 1049-1058. Details.
  • Karr, JE ;Luoto, TM ;Gilman, IG ;Berghem, K ;Kotilainen, AK ;Iverson, GL "Age, symptoms, and functional outcome after mild traumatic brain injury." Acta neurologica Scandinavica 141, 2 (2020): 183-190. Details. Full text
  • Karr, JE ;Iverson, GL "Interpreting high scores on the NIH Toolbox Cognition Battery: Potential utility for detecting cognitive decline in high-functioning individuals." Neuropsychology (2020): Details.
  • Iverson, GL ;Jones, PJ ;Karr, JE ;Maxwell, B ;Zafonte, R ;Berkner, PD ;McNally, RJ "Network Structure of Physical, Cognitive, and Emotional Symptoms at Preseason Baseline in Student Athletes with Attention-Deficit/ Hyperactivity Disorder." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists (2020): Details. Full text
  • Karr, JE ;Iverson, GL "The structure of post-concussion symptoms in adolescent student athletes: confirmatory factor analysis and measurement invariance." The Clinical neuropsychologist (2020): 1-40. Details.
  • Cook, NE ;Iaccarino, MA ;Karr, JE ;Iverson, GL "Attention-Deficit/Hyperactivity Disorder and Outcome After Concussion: A Systematic Review." Journal of developmental and behavioral pediatrics : JDBP 41, 7 (2020): 571-582. Details. Full text
  • Stenberg, J ;Karr, JE ;Terry, DP ;Håberg, AK ;Vik, A ;Skandsen, T ;Iverson, GL "Change in self-reported cognitive symptoms after mild traumatic brain injury is associated with changes in emotional and somatic symptoms and not changes in cognitive performance." Neuropsychology 34, 5 (2020): 560-568. Details. Full text
  • Iverson, GL ;Karr, JE ;Terry, DP ;Garcia-Barrera, MA ;Holdnack, JA ;Ivins, BJ ;Silverberg, ND "Developing an Executive Functioning Composite Score for Research and Clinical Trials." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists 35, 3 (2020): 312-325. Details. Full text
  • Karr, JE ;Rau, HK ;Shofer, JB ;Hendrickson, RC ;Peskind, ER ;Pagulayan, KF "Variables associated with subjective cognitive change among Iraq and Afghanistan war Veterans with blast-related mild traumatic brain injury." Journal of clinical and experimental neuropsychology 41, 7 (2019): 680-693. Details.
  • Iverson, GL ;Ivins, BJ ;Karr, JE ;Crane, PK ;Lange, RT ;Cole, WR ;Silverberg, ND "Comparing Composite Scores for the ANAM4 TBI-MIL for Research in Mild Traumatic Brain Injury." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists 35, 1 (2019): 56-69. Details. Full text
  • Cook, NE ;Karr, JE ;Brooks, BL ;Garcia-Barrera, MA ;Holdnack, JA ;Iverson, GL "Multivariate base rates for the assessment of executive functioning among children and adolescents." Child neuropsychology : a journal on normal and abnormal development in childhood and adolescence 25, 6 (2019): 836-858. Details. Full text
  • Karr, JE ;Hofer, SM ;Iverson, GL ;Garcia-Barrera, MA "Examining the Latent Structure of the Delis-Kaplan Executive Function System." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists 34, 3 (2019): 381-394. Details. Full text
  • Iverson, GL ;Terry, DP ;Karr, JE ;Panenka, WJ ;Silverberg, ND "Perceived Injustice and Its Correlates after Mild Traumatic Brain Injury." Journal of neurotrauma 35, 10 (2018): 1156-1166. Details. Full text
  • Karr, JE ;Garcia-Barrera, MA ;Holdnack, JA ;Iverson, GL "Advanced clinical interpretation of the Delis-Kaplan Executive Function System: multivariate base rates of low scores." The Clinical neuropsychologist 32, 1 (2018): 42-53. Details.
  • Karr, JE ;Areshenkoff, CN ;Rast, P ;Hofer, SM ;Iverson, GL ;Garcia-Barrera, MA "The unity and diversity of executive functions: A systematic review and re-analysis of latent variable studies." Psychological bulletin 144, 11 (2018): 1147-1185. Details. Full text
  • Karr, JE ;Graham, RB ;Hofer, SM ;Muniz-Terrera, G "When does cognitive decline begin? A systematic review of change point studies on accelerated decline in cognitive and neurological outcomes preceding mild cognitive impairment, dementia, and death." Psychology and aging 33, 2 (2018): 195-218. Details. Full text
  • Karr, JE ;Garcia-Barrera, MA ;Holdnack, JA ;Iverson, GL "Using Multivariate Base Rates to Interpret Low Scores on an Abbreviated Battery of the Delis-Kaplan Executive Function System." Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists 32, 3 (2017): 297-305. Details. Full text
  • Smart, CM ;Karr, JE ;Areshenkoff, CN ;Rabin, LA ;Hudon, C ;Gates, N ;Ali, JI ;Arenaza-Urquijo, EM ;Buckley, RF ;Chetelat, G ;Hampel, H ;Jessen, F ;Marchant, NL ;Sikkes, SAM ;Tales, A ;Van der Flier, WM ;Wesselman, L ;Working, Group. and the Su "Non-Pharmacologic Interventions for Older Adults with Subjective Cognitive Decline: Systematic Review, Meta-Analysis, and Preliminary Recommendations." Neuropsychology review 27, 3 (2017): 245-257. Details. Full text
  • Karr, JE ;Garcia-Barrera, MA "The assessment of executive functions using the BASC-2." Psychological assessment 29, 9 (2017): 1182-1187. Details. Full text
  • Garcia-Barrera, MA ;Karr, JE ;Trujillo-Orrego, N ;Trujillo-Orrego, S ;Pineda, DA "Evaluating empathy in Colombian ex-combatants: Examination of the internal structure of the Interpersonal Reactivity Index (IRI) in Spanish." Psychological assessment 29, 1 (2017): 116-122. Details. Full text
  • Garcia-Barrera, MA ;Karr, JE ;Duran, V ;Direnfeld, E ;Pineda, DA "Cross-cultural validation of a behavioral screener for executive functions: Guidelines for clinical use among Colombian children with and without ADHD." Psychological assessment 27, 4 (2015): 1349-63. Details. Full text
  • Karr, JE ;Areshenkoff, CN ;Rast, P ;Garcia-Barrera, MA "An empirical comparison of the therapeutic benefits of physical exercise and cognitive training on the executive functions of older adults: a meta-analysis of controlled trials." Neuropsychology 28, 6 (2014): 829-45. Details. Full text
  • Karr, JE ;Areshenkoff, CN ;Garcia-Barrera, MA "The neuropsychological outcomes of concussion: a systematic review of meta-analyses on the cognitive sequelae of mild traumatic brain injury." Neuropsychology 28, 3 (2014): 321-36. Details. Full text
  • Karr, JE ;Areshenkoff, CN ;Duggan, EC ;Garcia-Barrera, MA "Blast-related mild traumatic brain injury: a Bayesian random-effects meta-analysis on the cognitive outcomes of concussion among military personnel." Neuropsychology review 24, 4 (2014): 428-44. Details. Full text
  • Garcia-Barrera, MA ;Karr, JE ;Kamphaus, RW "Longitudinal applications of a behavioral screener of executive functioning: assessing factorial invariance and exploring latent growth." Psychological assessment 25, 4 (2013): 1300-13. Details. Full text
  • Walters, JK ;Olson, R ;Karr, J ;Zoller, E ;Cain, D ;Douglas, JP "Elevated occupational transportation fatalities among older workers in Oregon: an empirical investigation." Accident; analysis and prevention 53, (2013): 28-38. Details. Full text
  • Karr, JE ;Grindstaff, TR ;Alexander, JE "Omega-3 polyunsaturated fatty acids and cognition in a college-aged population." Experimental and clinical psychopharmacology 20, 3 (2012): 236-42. Details. Full text
  • Karr, JE ;Alexander, JE ;Winningham, RG "Omega-3 polyunsaturated fatty acids and cognition throughout the lifespan: a review." Nutritional neuroscience 14, 5 (2011): 216-25. Details. Full text
  • Wallace, J ;Karr, JE ;Schatz, P ;Worts, P ;Covassin, T ;Iverson, GL "The Frequency of Low Scores on ImPACT in Adolescent Student-Athletes: Stratification by Race and Socioeconomic Status Using Multivariate Base Rates." Developmental neuropsychology 47, 3 (1969): 125-135. Details. Full text
  • Karlsen, RH ;Karr, JE ;Saksvik, SB ;Lundervold, AJ ;Hjemdal, O ;Olsen, A ;Iverson, GL ;Skandsen, T "Examining 3-month test-retest reliability and reliable change using the Cambridge Neuropsychological Test Automated Battery." Applied neuropsychology. Adult 29, 2 (1969): 146-154. Details. Full text
  • Iverson, GL ;Karr, JE ;Maxwell, B ;Zafonte, R ;Berkner, PD ;Cook, NE "Examining Criteria for Defining Persistent Post-concussion Symptoms in Children and Adolescents." Frontiers in neurology 12, (0): 614648. Details. Full text
  • Huebschmann, NA ;Luoto, TM ;Karr, JE ;Berghem, K ;Blennow, K ;Zetterberg, H ;Ashton, NJ ;Simrén, J ;Posti, JP ;Gill, JM ;Iverson, GL "Comparing Glial Fibrillary Acidic Protein (GFAP) in Serum and Plasma Following Mild Traumatic Brain Injury in Older Adults." Frontiers in neurology 11, (0): 1054. Details. Full text
  • Iverson, GL ;Karr, JE "Association Between Concussions and Suicidality in High School Students in the United States." Frontiers in neurology 13, (0): 810361. Details. Full text
  • Stenberg, J ;Karr, JE ;Karlsen, RH ;Skandsen, T ;Silverberg, ND ;Iverson, GL "Examining Test-Retest Reliability and Reliable Change for Cognition Endpoints for the CENTER-TBI Neuropsychological Test Battery." Frontiers in neurology 11, (0): 541533. Details. Full text
  • Stenberg, J ;Karr, JE ;Terry, DP ;Saksvik, SB ;Vik, A ;Skandsen, T ;Silverberg, ND ;Iverson, GL "Developing Cognition Endpoints for the CENTER-TBI Neuropsychological Test Battery." Frontiers in neurology 11, (0): 670. Details. Full text
  • Iverson, GL ;Karr, JE "Improving the Methodology for Identifying Mild Cognitive Impairment in Intellectually High-Functioning Adults Using the NIH Toolbox Cognition Battery." Frontiers in psychology 12, (0): 724888. Details. Full text
  • Karr, JE ;Iverson, GL ;Berghem, K ;Kotilainen, AK ;Terry, DP ;Luoto, TM "Complicated mild traumatic brain injury in older adults: Post-concussion symptoms and functional outcome at one week post injury." Brain injury 34, 1 (0): 26-33. Details. Full text
  • Iverson, GL ;Karr, JE ;Gardner, AJ ;Silverberg, ND ;Terry, DP "Results of scoping review do not support mild traumatic brain injury being associated with a high incidence of chronic cognitive impairment: Commentary on McInnes et al. 2017." PloS one 14, 9 (0): e0218997. Details. Full text
  • Karr, JE ;Garcia-Barrera, MA ;Areshenkoff, CN "Executive functions and intraindividual variability following concussion." Journal of clinical and experimental neuropsychology 36, 1 (0): 15-31. Details.
  • Iverson, GL ;Jones, PJ ;Karr, JE ;Maxwell, B ;Zafonte, R ;Berkner, PD ;McNally, RJ "Architecture of Physical, Cognitive, and Emotional Symptoms at Preseason Baseline in Adolescent Student Athletes With a History of Mental Health Problems." Frontiers in neurology 11, (0): 175. Details. Full text
* Publications are automatically pulled from pubmed.gov based on a user-specific query. Results may include incorrect citations. See: Tutorial on improving PubMed results.