Neurocognitive impairment in deficit and non-deficit schizophrenia: a meta-analysis

2017 ◽  
Vol 47 (14) ◽  
pp. 2401-2413 ◽  
Author(s):  
E. Bora ◽  
B. Binnur Akdede ◽  
K. Alptekin
Keyword(s):  
Cognitive Abilities ◽  
Meta Analysis ◽  
Healthy Controls ◽  
Cognitive Domains ◽  
Deficit Syndrome ◽  
Deficit Schizophrenia ◽  
Analytic Review ◽  
Severe Impairment ◽  
Neurocognitive Profiles ◽  
The Relationship

BackgroundMost studies suggested that patients with deficit schizophrenia have more severe impairment compared with patients with non-deficit schizophrenia. However, it is not clear whether deficit and non-deficit schizophrenia are associated with differential neurocognitive profiles.MethodsThe aim of this meta-analytic review was to compare cognitive performances of deficit and non-deficit patients with each other and with healthy controls. In the current meta-analysis, differences in cognitive abilities between 897 deficit and 1636 non-deficit patients with schizophrenia were examined. Cognitive performances of 899 healthy controls were also compared with 350 patients with deficit and 592 non-deficit schizophrenia.ResultsBoth deficit (d= 1.04–1.53) and non-deficit (d= 0.68–1.19) schizophrenia were associated with significant deficits in all cognitive domains. Deficit patients underperformed non-deficit patients in all cognitive domains (d= 0.24–0.84) and individual tasks (d= 0.39–0.93). The relationship between deficit syndrome and impairment in olfaction, social cognition, verbal fluency, and speed-based cognitive tasks were relatively stronger.ConclusionsOur findings suggest that there is consistent evidence for a significant relationship between deficit syndrome and more severe cognitive impairment in schizophrenia.

A Meta Analytic Review of the Relationship between Emotional Intelligence and Leadership Effectiveness

2019 ◽  
Vol 118 (9) ◽  
pp. 118-126
Author(s):  
Augusty P. A ◽  
Jain Mathew
Keyword(s):  
Systematic Review ◽  
Emotional Intelligence ◽  
Direct Relationship ◽  
Effective Leadership ◽  
Leadership Effectiveness ◽  
Meta Analysis ◽  
Correlation Coefficients ◽  
Review Of Literature ◽  
Analytic Review ◽  
The Relationship

The study evaluates the relationship between Emotional Intelligence and Leadership Effectiveness through a Systematic Review of Literature. The relationship has been evaluated in two steps. First, a Systematic review of literature was done to provide a theoretical framework to link the dimensions of Emotional Intelligence to the elements of effective leadership. Meta-analysis was then used to consolidate empirical evidence of the relationship. The studies for the meta-analysis were sourced from Pro Quest and EBSCO and the correlation coefficients of the studies were analysed. Only articles that presented the direct relationship between the variables were included in the study. The results of the analysis revealed a strong, statistically significant relationship between emotional intelligence and effective leadership. The findings of the study provide evidence for the proposition that Emotional Intelligence and Leadership Effectiveness are interrelated.

A Meta-Analytic Review of the Relationship Between Learning Organization and Organizational Performance and Employee Attitudes: Using the Dimensions of Learning Organization Questionnaire

2021 ◽  
pp. 153448432098736
Author(s):  
Boreum Ju ◽  
Yunsoo Lee ◽  
Sunyoung Park ◽  
Seung Won Yoon
Keyword(s):  
Organizational Performance ◽  
National Culture ◽  
Learning Organization ◽  
Meta Analysis ◽  
Negative Relationship ◽  
Employee Attitudes ◽  
Future Research ◽  
Analytic Review ◽  
Dimensions Of Learning ◽  
The Relationship

The purpose of this meta-analysis study is to examine the correlations between the Dimensions of Learning Organization Questionnaire (DLOQ) and frequently examined outcomes including organizational performance and employee attitudes. Positive relationships were found between the DLOQ and organizational performance (e.g., financial, knowledge, and innovative performance) and employee attitudes (e.g., organizational commitment and job satisfaction) and the sub-dimensions (e.g., affective, continuance, and normative commitment), with a notable exception of a negative relationship between the DLOQ and turnover. Because the DLOQ has been used in many countries over the years, this study also examined the influence of national culture on the outcomes. Power distance moderated the relationship between the learning organization and overall organizational performance. Our meta-analytic review makes substantive contributions to the literature on the learning organization concept and the study of national culture as a significant moderator. Implications of these findings and suggestions for future research are discussed.

Psychological Empowerment and Job Satisfaction: A Meta-analytic Review

2021 ◽  
pp. 097226292199435
Author(s):  
Jain Mathew ◽  
Sridevi Nair
Keyword(s):  
Systematic Review ◽  
Job Satisfaction ◽  
Psychological Empowerment ◽  
Meta Analysis ◽  
Direct Relation ◽  
Review Of Literature ◽  
Organizational Settings ◽  
Analytic Review ◽  
The Relationship ◽  
Intervening Variables

Studies in the area of psychological empowerment have been on the rise since early 1990s. Given the large amount of information available, the researchers aim to consolidate findings, in order to arrive at a deeper understanding of the concept and its relation to job satisfaction of employees in organizations. The researchers have identified 50 studies, set in varied cultural and organizational settings. The data from these studies form the basis of the analysis in this paper. A meta-analysis of the findings of the chosen studies was conducted. This is followed by a systematic review of literature, to identify a few probable intervening variables that modify the relationship. The findings of the analysis suggest that the direct relation between psychological empowerment and job satisfaction is positive, strong and statistically significant. The study supports the validity of one of the earliest models explaining the relation. The paper establishes that the direct relation between psychological empowerment and job satisfaction is strong, positive and significant. The variations in the strength of the relationship is due to the presence of certain intervening variables like culture, age, educational qualification and experience.

Intergroup Threat and Outgroup Attitudes: A Meta-Analytic Review

2006 ◽  
Vol 10 (4) ◽  
pp. 336-353 ◽  
Author(s):  
Blake M. Riek ◽  
Eric W. Mania ◽  
Samuel L. Gaertner
Keyword(s):  
Meta Analysis ◽  
Intergroup Threat ◽  
Negative Stereotypes ◽  
Future Directions ◽  
Intergroup Anxiety ◽  
Analytic Review ◽  
Integrated Approaches ◽  
The Relationship ◽  
Group Esteem ◽  
Threat Theory

This article examines the relationship between intergroup threat and negative outgroup attitudes. We first qualitatively review the intergroup threat literature, describing the shift from competing theories toward more integrated approaches, such as the integrated threat theory (ITT; W. G. Stephan & Stephan, 2000). The types of threats discussed include: realistic threat, symbolic threat, intergroup anxiety, negative stereotypes, group esteem threat, and distinctiveness threat. We then conducted a quantitative meta-analysis examining the relationships between various intergroup threats and outgroup attitudes. The meta-analysis, involving 95 samples, revealed that 5 different threat types had a positive relationship with negative outgroup attitudes. Additionally, outgroup status moderated some of these relationships. Implications and future directions are considered.

scholarly journals Meta-analysis of epigenome-wide associations between DNA methylation at birth and childhood cognitive skills

2020 ◽  
Author(s):  
Doretta Caramaschi ◽  
Alexander Neumann ◽  
Andres Cardenas ◽  
Gwen Tindula ◽  
Silvia Alemany ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Cord Blood ◽  
Cognitive Abilities ◽  
Cognitive Skills ◽  
Strong Predictor ◽  
Meta Analysis ◽  
Later Life ◽  
Life Outcomes ◽  
Cognitive Domains ◽  
Wide Range

ABSTRACTCognitive skills are a strong predictor of a wide range of later life outcomes. Genetic and epigenetic associations across the genome explain some of the variation in general cognitive abilities in the general population and it is plausible that epigenetic associations might arise from prenatal environmental exposures and/or genetic variation early in life. We investigated the association between cord blood DNA methylation at birth and cognitive skills assessed in children from eight pregnancy cohorts (N=2196-3798) within the Pregnancy And Childhood Epigenetics (PACE) Consortium across overall, verbal and non-verbal cognitive scores. The associations at single CpG sites were weak for all of the cognitive domains investigated. One region near DUSP22 on chromosome 6 was associated with non-verbal cognition in a model adjusted for maternal IQ. We conclude that there is little evidence to support the idea that cord blood DNA methylation at single CpGs can predict cognitive skills and further studies are needed to confirm regional differences.

scholarly journals Neuroanatomy of Patients with Deficit Schizophrenia: An Exploratory Quantitative Meta-Analysis of Structural Neuroimaging Studies

2020 ◽  
Vol 17 (17) ◽  
pp. 6227 ◽  
Author(s):  
Tji Tjian Chee ◽  
Louis Chua ◽  
Hamilton Morrin ◽  
Mao Fong Lim ◽  
Johnson Fam ◽  
...  
Keyword(s):  
White Matter ◽  
Negative Symptoms ◽  
Meta Analysis ◽  
Regions Of Interest ◽  
Grey Matter Volume ◽  
Healthy Controls ◽  
White Matter Volume ◽  
Total Brain Volume ◽  
Matter Volume ◽  
Deficit Schizophrenia

Little is known regarding the neuroanatomical correlates of patients with deficit schizophrenia or persistent negative symptoms. In this meta-analysis, we aimed to determine whether patients with deficit schizophrenia have characteristic brain abnormalities. We searched PubMed, CINAHL and Ovid to identify studies that examined the various regions of interest amongst patients with deficit schizophrenia, patients with non-deficit schizophrenia and healthy controls. A total of 24 studies met our inclusion criteria. A random-effects model was used to calculate a combination of outcome measures, and heterogeneity was assessed by the I2 statistic and Cochran’s Q statistic. Our findings suggested that there was statistically significant reduction in grey matter volume (−0.433, 95% confidence interval (CI): −0.853 to −0.014, p = 0.043) and white matter volume (−0.319, 95% CI: −0.619 to −0.018, p = 0.038) in patients with deficit schizophrenia compared to healthy controls. There is also statistically significant reduction in total brain volume (−0.212, 95% CI: −0.384 to −0.041, p = 0.015) and white matter volume (−0.283, 95% CI: −0.546 to −0.021, p = 0.034) in patients with non-deficit schizophrenia compared to healthy controls. Between patients with deficit and non-deficit schizophrenia, there were no statistically significant differences in volumetric findings across the various regions of interest.

Enhancing Occupational Performance through Occupationally Embedded Exercise: A Meta-Analytic Review

1997 ◽  
Vol 17 (1) ◽  
pp. 25-47 ◽  
Author(s):  
Keh-Chung Lin ◽  
Ching-Yi Wu ◽  
Linda Tickle-Degnen ◽  
Wendy Coster
Keyword(s):  
Occupational Therapy ◽  
Meta Analysis ◽  
Empirical Studies ◽  
Theory And Practice ◽  
Occupational Performance ◽  
Nelson Model ◽  
Theoretical Inquiry ◽  
Analytic Review ◽  
The Impact ◽  
The Relationship

Occupation or purposeful activity is the unique historical root of occupational therapy and is thought to enhance health and prevent disability. Nelson's (1988) recent conceptual framework of occupation consolidates the beliefs of occupational therapy. One focus for empirical research and theoretical inquiry is the relationship between occupational form and occupational performance. This article critically analyzes this important part of the Nelson model and meta-analytically summarizes findings of the empirical studies that have examined this relationship. Results of the meta-analysis showed a substantial relationship of occupational form to occupational performance (weighted mean effect size r=0.50) in support of the proposition of the Nelson model that occupation can be analyzed in terms of the relationship between occupational form and occupational performance. The impact of potential moderators on the study findings is explored. Implications for occupational therapy theory and practice are discussed.

scholarly journals Meta-analysis of Theory of Mind (ToM) impairment in bipolar disorder

2015 ◽  
Vol 46 (2) ◽  
pp. 253-264 ◽  
Author(s):  
E. Bora ◽  
C. Bartholomeusz ◽  
C. Pantelis
Keyword(s):  
Bipolar Disorder ◽  
Theory Of Mind ◽  
Mood State ◽  
Meta Analysis ◽  
Interpersonal Problems ◽  
Developmental Trajectory ◽  
Healthy Controls ◽  
Manic Symptoms ◽  
Different Types ◽  
The Relationship

BackgroundTheory of mind (ToM) dysfunction is prominent in a number of psychiatric disorders, in particular, autism and schizophrenia, and can play a significant role in poor functioning. There is now emerging evidence suggesting that ToM abilities are also impaired in bipolar disorder (BP); however, the relationship between ToM deficits and mood state is not clear.MethodWe conducted a meta-analysis of ToM studies in BP. Thirty-four studies comparing 1214 patients with BP and 1097 healthy controls were included. BP groups included remitted (18 samples, 545 BP patients), subsyndromal (12 samples, 510 BP patients), and acute (manic and/or depressed) (10 samples, 159 BP patients) patients.ResultsToM performance was significantly impaired in BP compared to controls. This impairment was evident across different types of ToM tasks (including affective/cognitive and verbal/visual) and was also evident in strictly euthymic patients with BP (d = 0.50). There were no significant differences between remitted and subsyndromal samples. However, ToM deficit was significantly more severe during acute episodes (d = 1.23). ToM impairment was significantly associated with neurocognitive and particularly with manic symptoms.ConclusionSignificant but modest sized ToM dysfunction is evident in remitted and subsyndromal BP. Acute episodes are associated with more robust ToM deficits. Exacerbation of ToM deficits may contribute to the more significant interpersonal problems observed in patients with acute or subsyndromal manic symptoms. There is a need for longitudinal studies comparing the developmental trajectory of ToM deficits across the course of the illness.

Empathy and Theory of Mind in Alzheimer’s Disease: A Meta-analysis

2020 ◽  
Vol 26 (10) ◽  
pp. 963-977
Author(s):  
Olivia P. Demichelis ◽  
Sarah P. Coundouris ◽  
Sarah A. Grainger ◽  
Julie D. Henry
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Theory Of Mind ◽  
Cognitive Processing ◽  
Cognitive Abilities ◽  
Social Cognitive ◽  
Meta Analysis ◽  
Cognitive Empathy ◽  
Analytic Review ◽  
Social Cognitive Processing

AbstractObjective:A large literature now shows that Alzheimer’s disease (AD) disrupts a number of social cognitive abilities, including social perceptual function and theory of mind (ToM). However, less well understood is how the specific subcomponents of ToM as well as both the broader and specific subcomponents of empathic processing are affected.Method:The current study provides the first meta-analytic review of AD that focuses on both empathy and ToM as broad constructs, as well as their overlapping (cognitive empathy and affective ToM) and distinct (affective empathy and cognitive ToM) subcomponents.Results:Aggregated across 31 studies, the results revealed that, relative to controls, AD is associated with large-sized deficits in both cognitive ToM (g = 1.09) and affective ToM/cognitive empathy (g = 0.76). However, no statistical differences were found between the AD participants and controls on affective empathic abilities (g = 0.36).Conclusions:These data point to a potentially important disconnect between core aspects of social cognitive processing in people with AD. The practical and theoretical implications of these findings are discussed.

The generalizability of transformational leadership across cultures: a meta-analysis

2019 ◽  
Vol 34 (3) ◽  
pp. 139-155 ◽  
Author(s):  
Marcus Crede ◽  
Jaehee Jong ◽  
Peter Harms
Keyword(s):  
Transformational Leadership ◽  
Cultural Values ◽  
Western Europe ◽  
Cultural Practices ◽  
Leadership Behaviors ◽  
Employee Performance ◽  
Meta Analysis ◽  
Content Type ◽  
Analytic Review ◽  
The Relationship

Purpose The purpose of this paper is to investigate whether the effectiveness of transformational leadership behaviors are moderated by a country’s cultural values and cultural practices. Design/methodology/approach The authors describe a meta-analytic review of the relationship between transformational leadership and employee performance (task performance and OCBs) using data from over 57,000 individuals, 215 samples and 34 countries. The authors examine whether this relationship is moderated by the cultural values and practices of the country in which the study was located – after first controlling for methodological factors. Findings The authors find that cultural values and practices moderate the transformational leadership – employee performance relationship such that the relationship is much stronger in countries whose culture is incongruent with transformational leadership. Research limitations/implications Data were only available for 34 countries and it is unclear what role industry type and job type play in determining transformational leadership effectiveness or if these situational variables are confounded with culture. The findings call into question the generalizability of transformational leadership across countries and cultures. Practical implications The findings suggest that the value of transformational leadership behaviors may be limited in developed economies such as Western Europe and North America, while transformational leadership is most effective in Africa, the Middle East, South America and parts of Southeast Asia. Originality/value This is the first paper to examine the generalizability of transformational leadership across 34 countries and is by far the largest review ever conducted into the relationship between transformational leadership and subordinate performance.

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