Behavioural Vigilance in Schizophrenia

1996 ◽  
Vol 169 (6) ◽  
pp. 781-789 ◽  
Author(s):  
Corinne M. Mar ◽  
David A. Smith ◽  
Martin Sarter
Keyword(s):  
Sustained Attention ◽  
Testing Procedure ◽  
False Alarms ◽  
Vigilance Decrement ◽  
Monetary Rewards ◽  
Schizophrenic Patients ◽  
Behavioural Test ◽  
Signal Detectability ◽  
And Gender ◽  
And Control

BackgroundDespite 30 years of research, some surprisingly fundamental gaps remain in our understanding of schizophrenic input dysfunctions.MethodIn a provisional test of a ‘hyperattention’ hypothesis, schizophrenic patients and control subjects performed a behavioural test that was adapted from a paradigm originally developed for characterising vigilance or sustained attention in animals. On this computerised operant testing procedure, subjects discriminated between signals of various salience and non-signal presentations. Hits and correct rejections resulted in monetary rewards while misses and false alarms entailed monetary costs.ResultsData from in-patients with schizophrenia and age, education and gender-matched controls support hypotheses not only about hyperattentional dysfunctions in schizophrenia with respect to overall signal detectability but also in terms of resistance to the vigilance decrement that normally occurs over trials.ConclusionsThe theoretical importance of impairments of this sort are discussed with respect to the cognitive and perceptual consequences of hypervigilance and ‘input dysfunction’.

Performance in Vigilance Tasks is Related to Both State and Contextual Motivation

2016 ◽  
Vol 60 (1) ◽  
pp. 1145-1149 ◽  
Author(s):  
Alexis R. Dewar ◽  
Nicholas W. Fraulini ◽  
Victoria L. Claypoole ◽  
James L. Szalma
Keyword(s):  
Intrinsic Motivation ◽  
Sustained Attention ◽  
Vigilance Task ◽  
False Alarms ◽  
Time On Task ◽  
Vigilance Decrement ◽  
Vigilance Performance ◽  
Task Instructions ◽  
State Motivation

Vigilance, or sustained attention, is the ability to maintain attention to stimuli over a prolonged period of time. Synonymous with the study of sustained attention is the vigilance decrement, which is a decline in performance as a function of time on task. In the present study, we examined the effects of state motivation (i.e., motivation measured immediately prior to the task) and context-based motivation (i.e., motivation that stems from task instructions) on vigilance performance in a sensory-based vigilance task. Forty-three participants completed a 24-minute vigilance task, as well as measures of stress and workload. The results indicated that those higher in state intrinsic motivation and motivating instructions outperformed their peers in terms of hits and false alarms. We conclude that motivation may help facilitate vigilant attention.

scholarly journals Information and information resources in COVID-19: Awareness, control, and prevention

2021 ◽  
pp. 096100062110165
Author(s):  
Mohammadhiwa Abdekhoda ◽  
Fatemeh Ranjbaran ◽  
Asghar Sattari
Keyword(s):  
Low Cost ◽  
Information Resources ◽  
Age And Gender ◽  
Use Of Resources ◽  
Strategic Approach ◽  
Wide Range ◽  
Data Collection Instrument ◽  
Control And Prevention ◽  
And Gender ◽  
And Control

This study was conducted with the aim of evaluating the role of information and information resources in the awareness, control, and prevention of COVID-19. This study was a descriptive-analytical survey in which 450 participants were selected for the study. The data collection instrument was a researcher-made questionnaire. Descriptive and inferential statistics were used to analyze the data through SPSS. The findings show that a wide range of mass media has become well known as information resources for COVID-19. Other findings indicate a significant statistical difference in the rate of using information resources during COVID-19 based on age and gender; however, this difference is not significant regarding the reliability of information resources with regard to age and gender. Health information has an undisputable role in the prevention and control of pandemic diseases such as COVID-19. Providing accurate, reliable, and evidence-based information in a timely manner for the use of resources and information channels related to COVID-19 can be a fast and low-cost strategic approach in confronting this disease.

Effects of Receiving Genetic Ancestry Results on Emerging Adults’ Ethnic-Racial Identity Affirmation

2021 ◽  
pp. 216769682110208
Author(s):  
Chelsea D. Williams ◽  
Tricia Smith ◽  
Amy Adkins ◽  
Chloe J. Walker ◽  
Arlenis Santana ◽  
...  
Keyword(s):  
Racial Identity ◽  
Emerging Adults ◽  
Genetic Ancestry ◽  
Male Students ◽  
Race And Gender ◽  
White Males ◽  
Post Test ◽  
And Gender ◽  
Testing Condition ◽  
And Control

Ethnic-racial identity (ERI) is associated with adaptive outcomes in emerging adulthood, but more research is needed on factors that may inform ERI, such as receiving one’s genetic ancestry results. The current study examined changes in ERI using a pre-test post-test design in which 116 emerging adults 18–25 years were randomly assigned to either receiving their genetic ancestry results before the post-test (the testing condition) or after post-test (the control condition). We also tested whether ethnicity/race and gender moderated these associations. Findings indicated that male students of color (SOC) in the testing condition experienced an increase in ERI affirmation from pre-test to post-test, and male SOC in the control condition experienced a decrease in ERI affirmation from pre-test to post-test. There were no significant differences in ERI affirmation change between students in the testing condition and control condition for female SOC, White males, or White females.

scholarly journals Entanglement and the Modern Australian Rhythm Method: Lantana’s Lessons in Policing Sexuality and Gender

2004 ◽  
Vol 1 (1) ◽  
Author(s):  
Kirsty Duncanson ◽  
Catriona Elder ◽  
Murray Pratt
Keyword(s):  
Dance Teacher ◽  
Know How ◽  
Good People ◽  
Cultural Medium ◽  
Sexuality And Gender ◽  
Australian Community ◽  
The Difference ◽  
And Gender ◽  
Protection And Control ◽  
And Control

Film in Australia, as with many other nations, is often seen as an important cultural medium where national stories about belonging and identity can be (re)produced in pleasurable and, at times, complicated ways. One such film is Ray Lawrence’s Lantana. Although striking a chord in Australia as a good film about ‘ basically good people’, people that rang ‘brilliantly’ true (Lantana DVD 2002), this paper argues that, at the same time as it produces a fantasy of a ‘good’ Australia, the film also conducts a regulation of what constitutes Australianness. In many ways the imaginary of Australia offered in this film, to its contemporary, urban, professional and intellectual elite audience, still draws on and (re)produces a vision of an Australian community that uses the same narrative frameworks of protection and control as the cruder discourses of ‘white Australia’ offered to an earlier generation of cinema-goers. This film’s central motif of the lantana bush, the out of control weed, that is known as both foreign and local is here emblematic of tensions about belonging, place and otherness. Yet while, within the film’s knowingly reflexive purview any remaining potential for racism is understood and itself under control – we know how to be good mutliculturalists –it is the trope of sexuality in Lantana that provides the real sense of edginess and anxiety about belonging. It is in this arena that the film sets up an idea of danger and –less self-consciously, and in the end more aggressively – marks out who is and who is not part of the community. In this context the motif of lantana signals an ambivalence about difference and the exotic. Lantana is both desirable because of the difference in its attractive Latin looks and repulsive or feared because of other qualities inherent within its difference: a refusal to behave and a propensity to get out-of control, spread and potentially take over. The film here explores desire for a taste of the other (a gay man, a newly separated woman, a Latin dance teacher). However, these fantasies are in the end emphatically shut down as the film ends by producing a vision of subtly normalised hetero, mono, familial (though not necessarily happy) forms of desiring, loving and reproducing in contemporary Australia.

scholarly journals A Study of Wideband Energy Reflectance in Patients with Otosclerosis: Data from a Chinese Population

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Suju Wang ◽  
Wenyang Hao ◽  
Chunxiao Xu ◽  
Daofeng Ni ◽  
Zhiqiang Gao ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Racial Differences ◽  
Chinese Population ◽  
Ambient Pressure ◽  
Control Group ◽  
Age And Gender ◽  
Significant Difference ◽  
And Gender ◽  
And Control ◽  
Peak Pressures

Objective(s). The purpose of this study was to explore the effectiveness of wideband acoustic immittance (WAI) in the diagnosis of otosclerosis by comparing the differences in the energy reflectance (ER) of WAI between patients with otosclerosis and age- and gender-matched normal hearing controls in the Chinese population. Methods. Twenty surgically confirmed otosclerotic ears were included in the otosclerotic group. The ER of WAI at ambient and peak pressures, resonance frequency, and 226-Hz tympanogram were collected prior to surgery using a Titan hearing test platform (Interacoustics A/S, Middelfart, Denmark). All diagnoses of otosclerosis in the tested ear were confirmed by surgery after the measurements. Thirteen normal adults (26 ears) who were age- and gender-matched with the otosclerotic patients were included as the control group. Results. At peak pressure, the ERs of otosclerotic patients were higher than those of the control group for frequencies less than 4,000Hz and were lower for frequencies greater than 4,000Hz. In addition, within the analyzed frequencies, the differences observed at 2,520Hz was statistically significant (p<0.05/16=0.003, Bonferroni corrected). At ambient pressure, the differences observed at 1,260 and 6,350Hz were statistically significant (p<0.05/16=0.003, Bonferroni corrected). Although the differences between the otosclerotic and control groups exhibited similar trends to those in studies implemented in Caucasian populations, the norms in the present study in the control group were different from those in the Caucasian populations, suggesting racial differences in WAI test results. Regarding the middle ear resonance frequency, no significant difference was observed between the two groups (P>0.05). Conclusion. WAI can provide valuable information for the diagnosis of otosclerosis in the Chinese population. Norms and diagnostic criteria corresponding to the patient’s racial group are necessary to improve the efficiency of WAI in the diagnosis of otosclerosis.

Quantitative Brain Measurements in Chronic Schizophrenia

1972 ◽  
Vol 121 (562) ◽  
pp. 259-264 ◽  
Author(s):  
Randall Rosenthal ◽  
Llewellyn B. Bigelow
Keyword(s):  
Chronic Schizophrenia ◽  
Controlled Study ◽  
Normal Variation ◽  
Autopsy Material ◽  
Organic Brain Disease ◽  
Schizophrenic Patients ◽  
Organic Brain ◽  
Brain Measurements ◽  
And Control ◽  
The Brain

Despite extensive gross and microscopic scrutiny, no consistent pathological findings have emerged from studies of autopsy material from schizophrenic patients. Dunlap (1924) carried out the first controlled study involving schizophrenic and control brains and concluded that ‘there was not even a suspicion of consistent organic brain disease as a basis for the psychosis of schizophrenia’. More recently both Wolf and Cowen (1952), and Weinstein (1954), reviewed the neuropathological literature and concluded that there were no consistent findings at autopsy that could be construed as characteristic of schizophrenia. These authors felt that earlier claims were based on failure to appreciate the range of normal variation in the brain as well as a failure to include an adequate control population in the study.

Somatosensory Evoked Potentials in Schizophrenia a Lateralisation Study

1990 ◽  
Vol 157 (6) ◽  
pp. 881-887 ◽  
Author(s):  
Paul Furlong ◽  
Paul Barczak ◽  
Gwilym Hayes ◽  
Graham Harding
Keyword(s):  
Index Finger ◽  
Objective Measure ◽  
Control Group ◽  
Temporal Region ◽  
Control Groups ◽  
Significant Difference ◽  
Schizophrenic Patients ◽  
Left And Right ◽  
And Control ◽  
Stimulation Of

The SSEPs obtained from 19 schizophrenics defined by RDC, DSM–III and PSE criteria Were compared with those from a control group of healthy volunteers. Previous findings of an abnormal lack of lateralising response in schizophrenic patients were not replicated. No significant difference in either amplitude or morphology between the traces obtained from the two groups were recorded. Ipsilateral and contralateral latencies for stimulation of the left and right index finger showed no significant difference in peak latency for any component between patient and control group. When mean peak-to-peak amplitudes were plotted the contralateral component was always greater in amplitude than the ipsilateral one. An objective measure of the degree of lateralisation, the percentage lateralisation quotient, showed no lateralisation differences between the patient and control groups. A case of myogenic contamination of ipsilateral components was observed calling into doubt findings where no temporal region monitoring has been performed.

A Blockchain-Enabled Approach for Online Stream Sensor Data Protection in Cyber-Physical Manufacturing Systems

2021 ◽  
Author(s):  
Zhangyue Shi ◽  
Chenang Liu ◽  
Chen Kan ◽  
Wenmeng Tian ◽  
Yang Chen
Keyword(s):  
Information Technologies ◽  
Manufacturing Systems ◽  
Rapid Development ◽  
Data Access ◽  
Sensor Data ◽  
False Alarms ◽  
Monitoring And Control ◽  
Stream Data ◽  
Physical Security ◽  
And Control

Abstract With the rapid development of the Internet of Things and information technologies, more and more manufacturing systems become cyber-enabled, which significantly improves the flexibility and productivity of manufacturing. Furthermore, a large variety of online sensors are also commonly incorporated in the manufacturing systems for online quality monitoring and control. However, the cyber-enabled environment may pose the collected online stream sensor data under high risks of cyber-physical attacks as well. Specifically, cyber-physical attacks could occur during the manufacturing process to maliciously tamper the sensor data, which could result in false alarms or failures of anomaly detection. In addition, the cyber-physical attacks may also illegally access the collected data without authorization and cause leakage of key information. Therefore, it becomes critical to develop an effective approach to protect online stream data from these attacks so that the cyber-physical security of the manufacturing systems could be assured. To achieve this goal, an integrative blockchain-enabled method, is proposed by leveraging both asymmetry encryption and camouflage techniques. A real-world case study that protects cyber-physical security of collected stream data in additive manufacturing is provided to demonstrate the effectiveness of the proposed method. The results demonstrate that malicious tampering could be detected in a relatively short time and the risk of unauthorized data access is significantly reduced as well.

scholarly journals Survey on Zoonotic Importance and Prevalence of Dirofilaria immitis Infection in Dogs of Tabriz, Iran

2020 ◽  
Vol 1 (1) ◽  
pp. 11-13
Author(s):  
Hossein Hashemzadeh Farhang ◽  
Seyed Razi Bahavarnia ◽  
Mohamad Javad Esmailzadeh ◽  
Navid Mahmoudi Kamalabad
Keyword(s):  
Dirofilaria Immitis ◽  
Circulatory System ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Comprehensive Examination ◽  
And Gender ◽  
One Year ◽  
Statistical Survey ◽  
And Control

Background: Dirofilaria immitis is one of the most important parasites of the circulatory system of dogs that causes severe cardiovascular events in the animal and it is reported to be the most common nematode in humans and dogs from many parts of Iran. Methods: In order to investigate the presence of Dirofilaria immitis infection in Tabriz, Iran, a cross-sectional study was performed on 200 owned and stray dogs. The blood samples were analyzed using Knott method. The prevalence of D. immitis infection was reported to be 15% in owned dogs. Results: The highest levels of infection were reported in dogs less than one year of age and the lowest in dogs aged over 9 years. In a statistical survey, there was a significant relationship between infection and gender. Conclusion: According to the findings of this study, due to the presence of D. immitis infection in this region, the need for a more comprehensive examination and control of the infection in this region is emphasized.

scholarly journals The Separation and Reunification of Germany: Rethinking a Natural Experiment Interpretation of the Enduring Effects of Communism

2020 ◽  
Vol 34 (2) ◽  
pp. 143-171 ◽  
Author(s):  
Sascha O. Becker ◽  
Lukas Mergele ◽  
Ludger Woessmann
Keyword(s):  
World War Ii ◽  
Natural Experiment ◽  
West Germany ◽  
Extensive Literature ◽  
World War ◽  
East And West Germany ◽  
Cautious Interpretation ◽  
East And West ◽  
And Gender ◽  
And Control

German separation in 1949 into a communist East and a capitalist West and their reunification in 1990 are commonly described as a natural experiment to study the enduring effects of communism. We show in three steps that the populations in East and West Germany were far from being randomly selected treatment and control groups. First, the later border is already visible in many socio-economic characteristics in pre-World War II data. Second, World War II and the subsequent occupying forces affected East and West differently. Third, a selective fifth of the population fled from East to West Germany before the building of the Wall in 1961. In light of our findings, we propose a more cautious interpretation of the extensive literature on the enduring effects of communist systems on economic outcomes, political preferences, cultural traits, and gender roles.

Sign in / Sign up

Export Citation Format

Share Document