Keith Richard Laws

Summary

Affiliation: University of Hertfordshire
Country: UK

Publications

  1. ncbi request reprint When is category specific in Alzheimer's disease?
    Keith R Laws
    Brain and Cognition Research Group, Psychology Division, Nottingham Trent University, Nottingham, UK
    Cortex 41:452-63. 2005
  2. doi request reprint Is Ginkgo biloba a cognitive enhancer in healthy individuals? A meta-analysis
    Keith R Laws
    Department of Psychology, School of Life and Medical Sciences, University of Hertfordshire, UK
    Hum Psychopharmacol 27:527-33. 2012
  3. ncbi request reprint The impact of colour, spatial resolution, and presentation speed on category naming
    Keith R Laws
    School of Psychology, University of Hertfordshire, UK
    Brain Cogn 62:89-97. 2006
  4. ncbi request reprint Domain-specific deficits in schizophrenia
    Keith R Laws
    School of Psychology, University of Hertfordshire, Harfield, Hertfordshire, UK
    Cogn Neuropsychiatry 11:537-56. 2006
  5. ncbi request reprint A predominance of category deficits for living things in Alzheimer's disease and Lewy body dementia
    Keith R Laws
    School of Psychology, University of Hertfordshire, Hatfield, United Kingdom
    J Int Neuropsychol Soc 13:401-9. 2007
  6. ncbi request reprint A meta-analytic review of category naming in Alzheimer's disease
    Keith R Laws
    School of Psychology, University of Hertfordshire, UK
    Neuropsychologia 45:2674-82. 2007
  7. ncbi request reprint Ecstasy (MDMA) and memory function: a meta-analytic update
    Keith R Laws
    School of Psychology, University of Hertfordshire, Hatfield, UK
    Hum Psychopharmacol 22:381-8. 2007
  8. doi request reprint Awareness of everyday executive difficulties precede overt executive dysfunction in schizotypal subjects
    Keith R Laws
    School of Psychology, University of Hertfordshire, College Lane Hatfield, UK
    Psychiatry Res 160:8-14. 2008
  9. doi request reprint 'Normal' semantic-phonemic fluency discrepancy in Alzheimer's disease? A meta-analytic study
    Keith R Laws
    School of Psychology, University of Hertfordshire, Hatfield, UK
    Cortex 46:595-601. 2010
  10. doi request reprint Delusion-prone individuals: stuck in their ways?
    Keith Richard Laws
    School of Psychology, University of Hertfordshire, Hatfield, UK
    Psychiatry Res 186:219-24. 2011

Detail Information

Publications40

  1. ncbi request reprint When is category specific in Alzheimer's disease?
    Keith R Laws
    Brain and Cognition Research Group, Psychology Division, Nottingham Trent University, Nottingham, UK
    Cortex 41:452-63. 2005
    ..In particular, they suggest that the greater proportion of living than nonliving deficits reported in the literature may be an artifact of the methods used...
  2. doi request reprint Is Ginkgo biloba a cognitive enhancer in healthy individuals? A meta-analysis
    Keith R Laws
    Department of Psychology, School of Life and Medical Sciences, University of Hertfordshire, UK
    Hum Psychopharmacol 27:527-33. 2012
    ..We conducted a meta-analysis to examine whether Ginkgo biloba (G. biloba) enhances cognitive function in healthy individuals...
  3. ncbi request reprint The impact of colour, spatial resolution, and presentation speed on category naming
    Keith R Laws
    School of Psychology, University of Hertfordshire, UK
    Brain Cogn 62:89-97. 2006
    ..The implications for category-specific object recognition deficits are discussed...
  4. ncbi request reprint Domain-specific deficits in schizophrenia
    Keith R Laws
    School of Psychology, University of Hertfordshire, Harfield, Hertfordshire, UK
    Cogn Neuropsychiatry 11:537-56. 2006
    ..2003), no study has investigated whether such deficits differentially affect specific categories of information (as they sometimes do in neurological cases)...
  5. ncbi request reprint A predominance of category deficits for living things in Alzheimer's disease and Lewy body dementia
    Keith R Laws
    School of Psychology, University of Hertfordshire, Hatfield, United Kingdom
    J Int Neuropsychol Soc 13:401-9. 2007
    ..The implications of this category bias is discussed in relation to relevant models of category specificity...
  6. ncbi request reprint A meta-analytic review of category naming in Alzheimer's disease
    Keith R Laws
    School of Psychology, University of Hertfordshire, UK
    Neuropsychologia 45:2674-82. 2007
    ..In contrast, effect sizes were not significantly related to dementia severity, patient age, the number of stimuli, years of education, or the number of matching variables controlled...
  7. ncbi request reprint Ecstasy (MDMA) and memory function: a meta-analytic update
    Keith R Laws
    School of Psychology, University of Hertfordshire, Hatfield, UK
    Hum Psychopharmacol 22:381-8. 2007
    ..27). Indeed, our analyses indicate that visual memory may be affected more by concurrent cannabis use. Finally, we found that the total lifetime number of ecstasy tablets consumed did not significantly predict memory performance...
  8. doi request reprint Awareness of everyday executive difficulties precede overt executive dysfunction in schizotypal subjects
    Keith R Laws
    School of Psychology, University of Hertfordshire, College Lane Hatfield, UK
    Psychiatry Res 160:8-14. 2008
    ..This suggests that perceived executive dysfunction is pre-morbidly present and may become evident in test performance only with the onset of schizophrenia itself...
  9. doi request reprint 'Normal' semantic-phonemic fluency discrepancy in Alzheimer's disease? A meta-analytic study
    Keith R Laws
    School of Psychology, University of Hertfordshire, Hatfield, UK
    Cortex 46:595-601. 2010
    ..The latter findings indicate that the semantic-phonemic fluency discrepancy measure often reported as an important distinguishing characteristic of AD patients may be an exaggerated normal tendency...
  10. doi request reprint Delusion-prone individuals: stuck in their ways?
    Keith Richard Laws
    School of Psychology, University of Hertfordshire, Hatfield, UK
    Psychiatry Res 186:219-24. 2011
    ..We propose that delusional-style thinking may be underpinned by an orbitofrontal-based reversal learning difficulty affecting the flexibility to adapt responses to changing contingencies and external pressure...
  11. ncbi request reprint On the distinction between access and store disorders in schizophrenia: a question of deficit severity?
    K R Laws
    Department of Psychology, University of Hertfordshire, UK
    Neuropsychologia 36:313-21. 1998
    ....
  12. ncbi request reprint A normal' category-specific advantage for naming living things
    K R Laws
    Department of Psychology, University of Hertfordshire, Hatfield, Herts, UK
    Neuropsychologia 37:1263-9. 1999
    ..Finally, because nonliving things have multiple representations in the real world, this may lower the probability of finding impaired naming and recognition in this category...
  13. ncbi request reprint The effect of 'masking' on picture naming
    Keith R Laws
    Department of Psychology, London Guildhall University, UK
    Cortex 38:137-47. 2002
    ....
  14. ncbi request reprint Executive inhibition and semantic association in schizophrenia
    Verity C Leeson
    Department of Psychology, London Metropolitan University, London, UK
    Schizophr Res 74:61-7. 2005
    ..The findings support the notion that increased inhibition underpins the disorganised access to semantic memory in patients with FTD...
  15. ncbi request reprint Storage and access procedures in schizophrenia: evidence for a two phase model of lexical impairment
    Verity C Leeson
    Department of Psychology, London Metropolitan University, UK
    J Clin Exp Neuropsychol 27:700-10. 2005
    ....
  16. doi request reprint False memory in schizophrenia patients with and without delusions
    Reena Bhatt
    School of Psychology, Cardiff University, Cardiff, UK
    Psychiatry Res 178:260-5. 2010
    ..e. rejecting previously seen words) high confidence responses than the ND group...
  17. doi request reprint The Hatfield Image Test (HIT): a new picture test and norms for experimental and clinical use
    Rebecca L Adlington
    School of Psychology, University of Hertfordshire, College Lane, Hatfield, Hertfordshire, AL10 9AB, UK
    J Clin Exp Neuropsychol 31:731-53. 2009
    ..These stimuli provide a useful corpus for experimental and clinical researchers...
  18. ncbi request reprint Category-specificity can emerge from bottom-up visual characteristics: evidence from a modular neural network
    Tim M Gale
    Department of Psychiatry, QEII Hospital, Welwyn Garden City, UK
    Brain Cogn 61:269-79. 2006
    ..We conclude that purely bottom-up visual characteristics can explain some important features of category-specific phenomena...
  19. doi request reprint Visual processing in Alzheimer's disease: surface detail and colour fail to aid object identification
    Rebecca L Adlington
    School of Psychology, University of Hertfordshire, Hatfield, Hertfordshire, UK
    Neuropsychologia 47:2574-83. 2009
    ..Finally, AD patients showed widespread and significant impairment on tasks of visual functioning, and low-level visual impairment was predictive of patient naming...
  20. ncbi request reprint Crowded and sparse domains in object recognition: consequences for categorization and naming
    Tim M Gale
    Department of Psychiatry, QEII Hospital, Welwyn Garden City, UK
    Brain Cogn 60:139-45. 2006
    ..g., color and line-drawn versions). Taken as a whole, these experiments show that the ease with which people categorize items maps strongly onto the ease with which they name them...
  21. doi request reprint The naming profile in Alzheimer patients parallels that of elderly controls
    Tim M Gale
    School of Psychology, University of Hertfordshire, Hatfield, UK
    J Clin Exp Neuropsychol 31:565-74. 2009
    ..Taken together, these findings indicate that while AD naming is, of course, quantitatively worse than that of controls, it does not qualitatively differ -- that is, it is an exaggerated normal profile...
  22. ncbi request reprint Testing for a deficit in single-case studies: effects of departures from normality
    John R Crawford
    School of Psychology, King s College, College of Life Sciences and Medicine, King s College, University of Aberdeen, Aberdeen AB24 2UB, UK
    Neuropsychologia 44:666-77. 2006
    ..With a specified error rate of 5%, actual error rates as high as 14.31% and 9.96% were observed for z and Crawford and Howell's method respectively. Potential solutions to the problem of non-normal data are evaluated...
  23. ncbi request reprint Category-specific naming and the 'visual' characteristics of line drawn stimuli
    Keith R Laws
    Department of Psychology, London Guildhall University, UK
    Cortex 38:7-21. 2002
    ..Finally, EO correlated significantly with error rates (PB and IPC did not). These findings contradict existing notions that line drawings of living things have greater visual similarity than nonliving things...
  24. ncbi request reprint Category-specific naming and modality-specific imagery
    Keith R Laws
    Department of Psychology, London Guildhall University, United Kingdom
    Brain Cogn 48:418-20. 2002
    ..These findings accord with the notion of a general association between visual imagery and picture naming, but provide no support for more specific links between modality-specific imagery vividness and naming in different categories...
  25. ncbi request reprint Visual similarity is greater for line drawings of nonliving than living things: the importance of musical instruments and body parts
    Keith R Laws
    Department of Psychology, London Guildhall University, United Kingdom
    Brain Cogn 48:421-4. 2002
    ..These counter-intuitive findings accord with patient data and thus, provide evidence for the psychological reality and utility of ED...
  26. ncbi request reprint Basic-level visual similarity and category specificity
    Tim M Gale
    Department of Computer Science, University of Hertfordshire, UK
    Brain Cogn 53:229-31. 2003
    ..Finally, subject ratings correlated significantly with the computational measures indicating that the neural model represents structural properties of the objects that are psychologically meaningful...
  27. ncbi request reprint The influence of surface and edge-based visual similarity on object recognition
    Keith R Laws
    Department of Psychology, London Guildhall University, UK
    Brain Cogn 53:232-4. 2003
    ..This suggests that similarity of edge information is more influential than similarity of surface characteristics for naming and for categorically separating living and nonliving things (be they line drawings or greyscale images)...
  28. ncbi request reprint Formal thought disorder is characterised by impaired lexical access
    Verity C Leeson
    Division of Neuroscience and Psychological Medicine, Imperial College London, and Fulbourn Hospital, Addenbrooke s NHS Trust, Cambridge, UK
    Schizophr Res 88:161-8. 2006
    ..Nevertheless, FTD is associated with additional lexical-semantic difficulties that are quantitatively different to those seen in patients without FTD, and which may reflect disorganized semantic access...
  29. ncbi request reprint Category deficits and paradoxical dissociations in Alzheimer's disease and Herpes Simplex Encephalitis
    Keith R Laws
    Nottingham Trent University, UK
    J Cogn Neurosci 17:1453-9. 2005
    ..The findings have significant implications for how we determine category effects and, more generally, for the methods used to document double dissociations across individual cases in this literature...
  30. ncbi request reprint Stability of set-shifting and planning abilities in patients with schizophrenia
    Philip J Tyson
    School of Health and Social Sciences, University of Gloucestershire, Francis Close Hall Campus, Swindon Road, Cheltenham, Gloucestershire, GL50 4AZ, UK
    Psychiatry Res 129:229-39. 2004
    ..This study accords with the presence of executive processing deficits in schizophrenia that are stable across time...
  31. ncbi request reprint Name relearning in elderly patients with schizophrenia: episodic and temporary, not semantic and permanent
    Tejinder K Kondel
    Cambridgeshire and Peterborough NHS Trust, UK
    Cogn Neuropsychiatry 11:1-12. 2006
    ....
  32. ncbi request reprint Cognitive function and social abilities in patients with schizophrenia: relationship with atypical antipsychotics
    Philip J Tyson
    School of Natural and Social Sciences, University of Gloucestershire, Cheltenham, UK
    Psychiatry Clin Neurosci 60:473-9. 2006
    ..These findings accord with the notion that serotonergic mechanisms are important determinants of both the cognitive and the social effects of the atypical antipsychotics...
  33. ncbi request reprint A domain-specific deficit for foodstuffs in patients with Alzheimer's disease
    Keith R Laws
    J Int Neuropsychol Soc 8:956-7. 2002
  34. ncbi request reprint Visual object processing in schizophrenia: evidence for an associative agnosic deficit
    Vania S Gabrovska
    Neuroscience and Psychiatry Unit, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
    Schizophr Res 59:277-86. 2003
    ..Single case analysis suggested that patients with schizophrenia have a selective deficit affecting object recognition and identification, with a pattern similar to visual associative agnosia in neurological patients...
  35. ncbi request reprint An attenuation of the 'normal' category effect in patients with Alzheimer's disease: a review and bootstrap analysis
    F Javier Moreno-Martinez
    U N E D, Departamento de Psicologia Basica I, C Juan del Rosal, No 10, 28040 Madrid, Spain
    Brain Cogn 63:167-73. 2007
    ..We conclude that the category effect in Alzheimer's disease is no larger than is expected in the healthy brain and may even represent a small diminution of the normal profile...
  36. ncbi request reprint Inflated and contradictory category naming deficits in Alzheimer's disease?
    Keith R Laws
    Brain and Cognition Research Group, Division of Psychology, Nottingham Trent University, UK
    Brain Cogn 53:416-8. 2003
    ..The results also show that ceiling effects may inflate the number of living thing deficits and hence, distort the reported ratio of living to nonliving cases...
  37. ncbi request reprint "Illusions of normality": a methodological critique of category-specific naming
    Keith R Laws
    Brain and Cognition Research Group, Division of Psychology, Nottingham Trent University, UK
    Cortex 41:842-51; discussion 852-3. 2005
    ..As a potential solution, certain minimal criteria are proposed that might aid with the attempt to document category effects that are more methodologically convincing...
  38. doi request reprint No category specificity in Alzheimer's disease: a normal aging effect
    F Javier Moreno-Martinez
    Universidad Nacional de Educacion a Distancia, Departamento de Psicologia Basica I, Madrid
    Neuropsychology 22:485-90. 2008
    ..This suggests that, although category effects in AD patients do not reflect intrinsic variables, the size and direction of the category effect are not different from those in elderly controls...
  39. ncbi request reprint Intellectual differences between schizophrenic patients and normal controls across the adult lifespan
    Tejinder K Kondel
    Department of Clinical and Health Psychology, University College London, London, UK
    J Clin Exp Neuropsychol 25:1045-56. 2003
    ..We propose that the lower NART IQ in older patients reflects a lower 'starting point' and that this may be related to lower educational opportunities in older patients...
  40. ncbi request reprint Why are our similarities so different? A reply to Humphreys and Riddoch
    Keith R Laws
    Brain and Cognition Research Group, Division of Psychology, Nottingham Trent University, UK
    Cortex 38:643-50. 2002