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Browsing by Author "Laws, K.R."
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An early marker for semantic memory impairment in patients with schizophrenia
Al-Uzri, M.M.; Laws, K.R.; Mortimer, A.M. (2004)Introduction: Semantic memory impairment is now a well-documented phenomenon in patients with schizophrenia. Nevertheless, the characteristics of this deficit and any early markers remain contentious. Methods: In this ... -
Ecstasy (MDMA) and memory function: a meta-analytic update
Laws, K.R.; Kokkalis, J. (2007)A meta-analysis was conducted to examine the impact of recreational ecstasy use on short-term memory (STM), long-term memory (LTM), verbal and visual memory. We located 26 studies containing memory data for ecstasy and ... -
The effect of 'masking' on picture naming
Laws, K.R.; Leeson, V.C.; Gale, T.M. (2002)It is frequently assumed that because compared to nonliving things, living things are less familiar, have lower name frequency, and are more visually complex, this makes them more difficult to name by patients and normal ... -
Executive functioning questionnaires : A critical review of factor analytic studies
Laws, K.R.; Schulz, Joerg (Nova Science Publishers Inc., USA., 2013-02-01)Executive function encapsulates those complex cognitive processes such as planningand executing strategies, inhibiting undesired responses, and managing emotionalresponses. Studies of neurological patients indicate that ... -
Executive inhibition and semantic association in schizophrenia
Leeson, V.C.; Simpson, A.; McKenna, P. J.; Laws, K.R. (2005)Research indicates that some patients with schizophrenia display aberrant inhibition of semantic memory, which may underpin formal thought disorder (FTD). We administered a novel Stroop-like paradigm to three groups of ... -
Facial emotion processing in schizophrenia : a non-specific neuropsychological deficit?
Pomarol-Clotet, E.; Hynes, F.; Ashwin, C.; Bullmore, E.T.; McKenna, P. J.; Laws, K.R. (2010)Background: Identification of facial emotions has been found to be impaired in schizophrenia but there are uncertainties about the neuropsychological specificity of the finding. Method: Twenty-two patients with schizophrenia ... -
False memories and delusional ideation in normal healthy subjects
Laws, K.R.; Bhatt, R. (2005)Studies have reported substantial mnestic deficits in patients with schizophrenia. Most of this research, however, has focussed on errors of omission (poor recall/recognition) rather than commission (such as false ... -
False memory in schizophrenia patients with and without delusions
Bhatt, R.; Laws, K.R.; McKenna, P. J. (2010)Delusions are fixed ‘false beliefs’ and, although a hallmark feature of schizophrenia, no previous study has examined if delusions might be related to ‘false memories’. We used the classic Deese–Roediger–McDermott (DRM) ... -
Formal thought disorder is characterised by impaired lexical access
Leeson, V.C.; Laws, K.R.; McKenna, P. J. (2006)Recent studies have proposed that difficulty with accessing the lexical–semantic memory store may underpin some of the specific linguistic problems associated with formal thought disorder (FTD). We examined the consistency ... -
From mind-pops to hallucinations? : A study of involuntary semantic memories in schizophrenia
Elua, I.; Laws, K.R.; Kvavilashvili, L. (2012-04-30)Involuntary semantic memories or mind-pops consist of isolated fragments of one's semantic knowledge (e.g., a word or a sentence, proper name, image or a melody) that come to mind unexpectedly, without any deliberate attempt ... -
Gender affects naming latencies for living and nonliving things: implications for familiarity
Laws, K.R. (1999)Recent studies indicate the presence of a gender-by-category interaction in the naming abilities of both Alzheimer's patients and normal subjects (Laiacona, Barbarotto and Capitani, 1998; McKenna and Parry, 1994). In ... -
Greater cognitive deterioration in women than men with Alzheimer's disease : a meta analysis
Irvine, K.; Laws, K.R.; Gale, T.M.; Kondel, T.K. (2012-11-01)Studies reporting on the cognitive abilities of men and women with Alzheimer's disease (AD) are surprisingly rare. We carried out a meta-analysis of neurocognitive data from 15 studies (n = 828 men; 1,238 women), which ... -
The Hatfield Image Test (HIT) : A new picture test and norms for experimental and clinical use
Adlington, Rebecca L.; Laws, K.R.; Gale, Tim M. (2009)We present a new corpus of 147 high-quality photographic colour images (the Hatfield Image Test: HIT). Existing sets of pictorial stimuli tend to be line drawn, contain many items that are readily identifiable by healthy ... -
Hypofrontality in Schizophrenia. A meta-analysis of functional imaging studies
Hill, K.; Mann, L.; Laws, K.R.; Stephenson, C. M. E.; Nimmo-Smith, I.; McKenna, P. J. (2004)Objective: Hypofrontality is not a well-replicated finding in schizophrenia either at rest or under conditions of task activation. Method: Studies comparing whole brain and frontal blood flow/ metabolism in schizophrenic ... -
Illusions of Normality: A Methodological Critique of Category-Specific Naming (published with peer commentaries and reply)
Laws, K.R. (2005)Category-specific disorders are perhaps the archetypal example of domain-specificity — being typically defined by the presence of dissociations between living and nonliving naming ability in people following neurological ... -
The impact of colour, spatial resolution and presentation speed on category naming
Laws, K.R.; Hunter, M. Z. (2006)Studies of neurological patients with category-speciWc agnosia have provided important contributions to our understanding of object recognition, although the meaning of such disorders is still hotly debated. One crucial ... -
The impact of dementia, age and sex on category fluency: Greater deficits in women with Alzheimer's disease
Moreno-Martinez, F.J.; Laws, K.R.; Schulz, J. (2008)A category specific effect in naming tasks has been reported in patients with Alzheimer's dementia. Nonetheless, naming tasks are frequently affected by methodological problems, e.g., ceiling effects for controls and ... -
Increased frequency of involuntary semantic memories or mind-pops in schizophrenia : a diary study
Elua, Ia; Laws, K.R.; Kvavilashvili, Lia (2015-11)INTRODUCTION: Hallucinations constitute a prominent symptom of schizophrenia and may take a variety of forms (verbal, visual, musical, or environmental noises). Interesting similarities exist between hallucinations and ... -
Intellectual differences between schizophrenic patients and normal controls across the adult lifespan
Kondel, T.K.; Mortimer, A.M.; Leeson, V.C.; Laws, K.R.; Hirsch, S.R. (2003)A debate persists about whether IQ declines during the duration of schizophrenia or whether an early deficit remains static across the lifespan. To examine this, we measured estimated current IQ (Quick Test Revised: QTR) ... -
Is executive impairment associated with schizophrenic syndromes? A meta-analysis
Dibben, C.R.M.; Rice, C.; Laws, K.R.; McKenna, P. J. (2009)A key neuropsychological proposal in schizophrenia is that negative and disorganization symptoms are associated with different patterns of impairment on executive tasks. Reporting correlations between positive, negative ...