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Articles 1081 - 1110 of 1465
Full-Text Articles in Entire DC Network
Quantum Theories Of Consciousness, Imants Barušs
Quantum Theories Of Consciousness, Imants Barušs
Psychology
The assumption is often made in conventional cognitive science that consciousness is a computational process resulting from macroscopic neural activity as described by classical physics. That assumption has been questioned both because it has been unsuccessful in explaining consciousness and because it is based on outdated ideas about the nature of matter. More contemporary quantum theories may be more successful for understanding cognition. For example, Mari Jibu, Kunio Yasue, and Yasushi Takahashi have proposed a theory of memory as a spinor field underlying cortical dipoles in which quantum mechanical tunnelling instantiates memory decay and in which the creation of Goldstone …
Social, Achievement, And Control Dimensions Of Personality-Life Event Vulnerability To Depression, P.A. Frewen, David J. A. Dozois
Social, Achievement, And Control Dimensions Of Personality-Life Event Vulnerability To Depression, P.A. Frewen, David J. A. Dozois
Psychology Publications
This study investigated whether Sociotropy and the subscales of Autonomy (i.e., Perfectionistic/Self-critical, Need for Control, and Defensive Separation) would show differential patterns of vulnerability to dysphoria in both retrospective and prospective designs. Each of these scales showed a predicted pattern of association with life goals and impact ratings for negative events in a retrospective design. In a prospective design, the scales showed differential associations with goal obtainment and cognitive-affective responses to life events but did not predict follow-up dysphoria independently of baseline dysphoria. These results are discussed in terms of the multidimensionality of personality vulnerability and depressogenic negative life events …
Development Of The Anxiety Change Expectancy Scale (Aces) And Validation In College, Community, And Clinical Samples., David J A Dozois, Henny A Westra
Development Of The Anxiety Change Expectancy Scale (Aces) And Validation In College, Community, And Clinical Samples., David J A Dozois, Henny A Westra
Psychology Publications
This study investigated the psychometric properties of a newly developed 20-item instrument that assesses one's anticipation of being able to change anxiety: the Anxiety Change Expectancy Scale (ACES). Study 1 evaluated the ACES in undergraduate university students, self-identified as experiencing difficulties with anxiety. Study 2 examined the ACES in a community sample of persons with anxiety difficulties. Study 3 tested the utility of the ACES in predicting treatment change in a group of individuals with generalized anxiety disorder participating in group cognitive behavioral therapy for anxiety. Across these samples, the ACES demonstrated excellent internal reliability (coefficient alphas=.89-.92) as well as …
The Cerebral Response During Subjective Choice With And Without Self-Reference, Sterling C. Johnson, Taylor W. Schmitz, Tisha N. Kawahara-Baccus, Howard A. Rowley, Andrew L. Alexander, Jonghoon Lee, Richard J. Davidson
The Cerebral Response During Subjective Choice With And Without Self-Reference, Sterling C. Johnson, Taylor W. Schmitz, Tisha N. Kawahara-Baccus, Howard A. Rowley, Andrew L. Alexander, Jonghoon Lee, Richard J. Davidson
Brain and Mind Institute Researchers' Publications
The anterior medial prefrontal (AMPFC) and retrosplenial (RSC) cortices are active during self-referential decision-making tasks such as when participants appraise traits and abilities, or current affect. Other appraisal tasks requiring an evaluative decision or mental representation, such as theory of mind and perspective-taking tasks, also involve these regions. In many instances, these types of decisions involve a subjective opinion or preference, but also a degree of ambiguity in the decision, rather than a strictly veridical response. However, this ambiguity is generally not controlled for in studies that examine self-referential decision-making. In this functional magnetic resonance imaging experiment with 17 healthy …
The Neural Mechanisms Of Speech Comprehension: Fmri Studies Of Semantic Ambiguity, Jennifer M Rodd, Matthew H Davis, Ingrid Johnsrude
The Neural Mechanisms Of Speech Comprehension: Fmri Studies Of Semantic Ambiguity, Jennifer M Rodd, Matthew H Davis, Ingrid Johnsrude
Brain and Mind Institute Researchers' Publications
A number of regions of the temporal and frontal lobes are known to be important for spoken language comprehension, yet we do not have a clear understanding of their functional role(s). In particular, there is considerable disagreement about which brain regions are involved in the semantic aspects of comprehension. Two functional magnetic resonance studies use the phenomenon of semantic ambiguity to identify regions within the fronto-temporal language network that subserve the semantic aspects of spoken language comprehension. Volunteers heard sentences containing ambiguous words (e.g. 'the shell was fired towards the tank') and well-matched low-ambiguity sentences (e.g. 'her secrets were written …
Glutamate Receptors In Perirhinal Cortex Mediate Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey
Glutamate Receptors In Perirhinal Cortex Mediate Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey
Brain and Mind Institute Researchers' Publications
Object recognition is consistently impaired in human amnesia and animal models thereof. Results from subjects with permanent brain damage have revealed the importance of the perirhinal cortex to object recognition memory. Here, we report evidence from rats for interdependent but distinct stages in object recognition memory (encoding, retrieval, and consolidation), which require glutamate receptor activity within perirhinal cortex. Transient blockade of AMPA receptor-mediated synaptic transmission within perirhinal cortex disrupted encoding for short- and long-term memory as well as retrieval and consolidation. In contrast, transient NMDA receptor blockade during encoding affected only long-term object recognition memory; NMDA receptor activity was also …
Learning To Like: A Role For Human Orbitofrontal Cortex In Conditioned Reward, Sylvia M L Cox, Alexandre Andrade, Ingrid Johnsrude
Learning To Like: A Role For Human Orbitofrontal Cortex In Conditioned Reward, Sylvia M L Cox, Alexandre Andrade, Ingrid Johnsrude
Brain and Mind Institute Researchers' Publications
A great deal of human behavior and motivation is based on the intrinsic emotional significance of rewarding or aversive events, as well as on the associations formed between such emotional events and concurrent environmental stimuli. Recent functional neuroimaging studies have implicated the ventral striatum, orbitofrontal cortex (OFC), and amygdala in the representation of reward values and/or in the anticipation of rewarding events. Here, we use functional magnetic resonance imaging to compare brain activation during the presentation of reward with that during presentation of (conditioned) stimuli that have been paired previously with reward. Specifically, we aimed to investigate conditioned reward in …
A Contralateral Preference In The Lateral Occipital Area: Sensory And Attentional Mechanisms., Matthias Niemeier, Herbert C Goltz, Anil Kuchinad, Douglas B Tweed, Tutis Vilis
A Contralateral Preference In The Lateral Occipital Area: Sensory And Attentional Mechanisms., Matthias Niemeier, Herbert C Goltz, Anil Kuchinad, Douglas B Tweed, Tutis Vilis
Brain and Mind Institute Researchers' Publications
Here we examined the level of the lateral occipital (LO) area within the processing stream of the ventral visual cortex. An important determinant of an area's level of processing is whether it codes visual elements on both sides of the visual field, as do higher visual areas, or prefers those in the contralateral visual field, as do early visual areas. The former would suggest that LO, on one side, combines bilateral visual elements into a whole, while the latter suggests that it codes only the parts of forms. We showed that LO has a relative preference for visual objects in …
Transient Inactivation Of Perirhinal Cortex Disrupts Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey
Transient Inactivation Of Perirhinal Cortex Disrupts Encoding, Retrieval, And Consolidation Of Object Recognition Memory., Boyer D Winters, Timothy J Bussey
Brain and Mind Institute Researchers' Publications
Damage to perirhinal cortex (PRh) impairs object recognition memory in humans, monkeys, and rats when tested in tasks such as delayed nonmatching to sample, visual paired comparison, and its rodent analog, the spontaneous object recognition task. In the present study, we have capitalized on the discrete one-trial nature of the spontaneous object recognition task to investigate the role of PRh in several distinct stages of object recognition memory. In a series of experiments, transient inactivation of PRh was accomplished with bilateral infusions of lidocaine directly into PRh immediately before the sample phase (encoding), immediately before the choice phase (retrieval), or …
Assimilation Of The Sami - Implementation And Consequences, Henry Minde
Assimilation Of The Sami - Implementation And Consequences, Henry Minde
Aboriginal Policy Research Consortium International (APRCi)
In May 2002 the Norwegian Sami Parliament discussed a motion put forward by the government of establishing a Sami people's fund as an act of reconciliation; to compensate for the state's former policy of norwe- gianisation [assimilation]. In conjunction with this case, the present article was originally written as a background paper to depict the present state of knowledge about the minority policy toward the Sami (1850- 1980). The paper shows that on one hand great efforts have been made to clarify the political aspects of norwegianisation towards the Sami and the Kven. One can conclude that the state's efforts …
Intelligence Correlates Of Transcendent Beliefs: A Preliminary Study, Nicole Lukey, Imants Barušs
Intelligence Correlates Of Transcendent Beliefs: A Preliminary Study, Nicole Lukey, Imants Barušs
Psychology
In previous research, Barušs and Moore had identified a material-transcendent dimension of beliefs about consciousness and reality that underlies the Western intellectual tradition including the academic study of consciousness. At one pole, materialists believe that reality is entirely physical in nature, whereas those tending toward the transcendent pole believe that reality cannot exhaustively be captured in physical terms. More recently, Jewkes and Barušs had found a number of personality correlates of transcendent beliefs including a tendency toward curiosity and a rational approach to the world [1]. These previous results prompted the present study in which 39 undergraduate psychology students at …
The Validity Of The Brief Version Of The Fear Of Negative Evaluation Scale., Kerry A Collins, Henny A Westra, David J A Dozois, Sherry H Stewart
The Validity Of The Brief Version Of The Fear Of Negative Evaluation Scale., Kerry A Collins, Henny A Westra, David J A Dozois, Sherry H Stewart
Psychology Publications
The Fear of Negative Evaluation Scale [FNE; J. Consult. Clin. Psychol. 33 (1969) 448] is a commonly used measure of social anxiety. A brief version of the scale (FNEB) is available for convenient administration. Despite being widely advocated for use, the psychometric properties of the FNEB have not been evaluated with clinically anxious samples. The present study addressed the reliability and validity of the FNEB in a clinical sample of individuals with either social phobia (n = 82) or panic disorder (n = 99) presenting for treatment. Factor analysis supported the construct validity of the FNEB. The validity of the …
Desire, Heavenly Bodies, And A Surrealist's Fascination With The Celestial Theatre, John G. Hatch
Desire, Heavenly Bodies, And A Surrealist's Fascination With The Celestial Theatre, John G. Hatch
Visual Arts Publications
In 1922, the German Surrealist artist Max Ernst produced a montage work that included a woman's bare buttocks protruding out of the rings of Saturn. It is, to say the least, an unusual combination of images, but one that addresses some very basic human impulses. Largely, It expresses Ernst's understanding that inscribed upon the night sky are some of our deepest held fears and fantasies. Ernst sought to generate contemporary rephrasings of our mythologizing of the cosmos in a complex and often enigmatic way, drawing on such varied sources as Freudian psychology, late nineteenth-century symbolism, alchemy, and Surrealism. Ultimately, Ernst …
Gaps In Accessing Treatment For Anxiety And Depression: Challenges For The Delivery Of Care., Kerry A Collins, Henny A Westra, David J A Dozois, David D Burns
Gaps In Accessing Treatment For Anxiety And Depression: Challenges For The Delivery Of Care., Kerry A Collins, Henny A Westra, David J A Dozois, David D Burns
Psychology Publications
Epidemiological studies have identified high prevalence rates of anxiety and depression in North America [e.g., J. of Nerv. Ment. Dis. 182 (1994) 290]. However, only a small percentage of these individuals access effective treatment. The undertreatment of anxiety and depression is a major public health issue and is associated with significant personal, social, and economic burden. This article describes the existing discrepancy between prevalence of anxiety and depression and access to effective treatment for adults and children, the contributors to this discrepancy, and suggests various means through which access to effective treatment may be enhanced. We begin with a brief …
Double Dissociation Between The Effects Of Peri-Postrhinal Cortex And Hippocampal Lesions On Tests Of Object Recognition And Spatial Memory: Heterogeneity Of Function Within The Temporal Lobe., Boyer D Winters, Suzanna E Forwood, Rosemary A Cowell, Lisa M Saksida, Timothy J Bussey
Double Dissociation Between The Effects Of Peri-Postrhinal Cortex And Hippocampal Lesions On Tests Of Object Recognition And Spatial Memory: Heterogeneity Of Function Within The Temporal Lobe., Boyer D Winters, Suzanna E Forwood, Rosemary A Cowell, Lisa M Saksida, Timothy J Bussey
Brain and Mind Institute Researchers' Publications
It is widely believed that declarative memory is mediated by a medial temporal lobe memory system consisting of several distinct structures, including the hippocampus and perirhinal cortex. The strong version of this view assumes a high degree of functional homogeneity and serial organization within the medial temporal lobe, such that double dissociations between individual structures should not be possible. In the present study, we tested for a functional double dissociation between the hippocampus and peri-postrhinal cortex in a single experiment. Rats with bilateral excitotoxic lesions of either the hippocampus or peri-postrhinal cortex were assessed in tests of spatial memory (radial …
Stages Of Change In Anxiety: Psychometric Properties Of The University Of Rhode Island Change Assessment (Urica) Scale., David J A Dozois, Henny A Westra, Kerry A Collins, Tak S Fung, Jennifer K F Garry
Stages Of Change In Anxiety: Psychometric Properties Of The University Of Rhode Island Change Assessment (Urica) Scale., David J A Dozois, Henny A Westra, Kerry A Collins, Tak S Fung, Jennifer K F Garry
Psychology Publications
Readiness for change is increasingly cited as an important variable in the health behaviours literature, yet there remains a dearth of research related to this construct in mental health. This study examined the psychometric properties of the University of Rhode Island Change Assessment (URICA) scale in two samples. In Study 1 (n = 252), undergraduates completed the URICA and were administered measures of hopelessness, the consequences of worry, self-esteem, anxious symptomatology, and social desirability. The reliability and validity of the URICA were generally supported, although the goodness-of-fit with the intended subscales was only moderate. The Precontemplation, Contemplation and Maintenance subscales …
Somatotopic Representation Of Action Words In Human Motor And Premotor Cortex, Olaf Hauk, Ingrid Johnsrude, Friedemann Pulvermüller
Somatotopic Representation Of Action Words In Human Motor And Premotor Cortex, Olaf Hauk, Ingrid Johnsrude, Friedemann Pulvermüller
Brain and Mind Institute Researchers' Publications
Since the early days of research into language and the brain, word meaning was assumed to be processed in specific brain regions, which most modern neuroscientists localize to the left temporal lobe. Here we use event-related fMRI to show that action words referring to face, arm, or leg actions (e.g., to lick, pick, or kick), when presented in a passive reading task, differentially activated areas along the motor strip that either were directly adjacent to or overlapped with areas activated by actual movement of the tongue, fingers, or feet. These results demonstrate that the referential meaning of action words has …
What Are The Chances? Evaluating Risk/Benefit Information In Consumer Health Materials, Jacquelyn Burkell
What Are The Chances? Evaluating Risk/Benefit Information In Consumer Health Materials, Jacquelyn Burkell
FIMS Publications
Much consumer health information addresses issues of disease risk or treatment risks and benefits, addressing questions such as ‘‘How effective is this treatment?’’ or ‘‘What is the likelihood that this test will give a false positive result?’’ Insofar as it addresses outcome likelihood, this information is essentially quantitative in nature, which is of critical importance, because quantitative information tends to be difficult to understand and therefore inaccessible to consumers. Information professionals typically examine reading level to determine the accessibility of consumer health information, but this measure does not adequately reflect the difficulty of quantitative information, including materials addressing issues of …
Experimental Test Of Possible Psychological Benefits Of Past-Life Regression, Kellye Woods, Imants Barušs
Experimental Test Of Possible Psychological Benefits Of Past-Life Regression, Kellye Woods, Imants Barušs
Psychology
The purpose of this study was to determine whether past-life regression can lead to increased psychological well-being and changes in fundamental beliefs about consciousness and reality among those who are psychologically healthy. Twenty-four undergraduate students each participated in a single guided imagery session in which they were given either a past-life or open suggestion. Participants who were given the past-life suggestion had better scores on some measures of psychological well-being than those given the open suggestion, although post-hoc tests did not reveal any differences in psychological well-being or beliefs between those who actually experienced past-life imagery and those who did …
Political Psychology In Canada, Paul Nesbitt-Larking
Political Psychology In Canada, Paul Nesbitt-Larking
Data and Test Instruments
Although a number of political psychologists are active in Canada, there has been relatively little self-conscious development of the field. This article brings together contributions from political science and social psychology in Canada in an attempt to identify aspects of Canadian distinctiveness in the field of political psychology, notably the balance between mainstream and eclectic tendencies.
Attentional Biases In Eating Disorders: A Meta-Analytic Review Of Stroop Performance., Keith S Dobson, David J A Dozois
Attentional Biases In Eating Disorders: A Meta-Analytic Review Of Stroop Performance., Keith S Dobson, David J A Dozois
Psychology Publications
The Stroop task has been adapted from cognitive psychology to be able to examine attentional biases in various forms of psychopathology, including the eating disorders. This paper reviews the research on the Stroop task in the eating disorders research area in both descriptive and meta-analytic fashions. Twenty-eight empirical studies are identified, which predominantly examine food and body/weight stimuli in bulimic, anorexic, or dieting/food-restricted samples. It is concluded that there is evidence of an attentional bias in bulimia for a range of stimuli but that the effect seems to be limited to body/weight stimuli in anorexia. The evidence to date is …
Gaze-Centered Updating Of Visual Space In Human Parietal Cortex., W Pieter Medendorp, Herbert C Goltz, Tutis Vilis, J Douglas Crawford
Gaze-Centered Updating Of Visual Space In Human Parietal Cortex., W Pieter Medendorp, Herbert C Goltz, Tutis Vilis, J Douglas Crawford
Brain and Mind Institute Researchers' Publications
Single-unit recordings have identified a region in the posterior parietal cortex (PPC) of the monkey that represents and updates visual space in a gaze-centered frame. Here, using event-related functional magnetic resonance imaging, we identified an analogous bilateral region in the human PPC that shows contralateral topography for memory-guided eye movements and arm movements. Furthermore, when eye movements reversed the remembered horizontal target location relative to the gaze fixation point, this PPC region exchanged activity across the two cortical lobules. This shows that the human PPC dynamically updates the spatial goals for action in a gaze-centered frame.
The Lateral Occipital Complex Subserves The Perceptual Persistence Of Motion-Defined Groupings., Susanne Ferber, G Keith Humphrey, Tutis Vilis
The Lateral Occipital Complex Subserves The Perceptual Persistence Of Motion-Defined Groupings., Susanne Ferber, G Keith Humphrey, Tutis Vilis
Brain and Mind Institute Researchers' Publications
How are the bits and pieces of retinal information assembled and integrated to form the coherent objects that we see? One long-established principle is that elements that move as a group are linked together. For instance a fragmented line-drawing of an object, placed on a background of randomly distributed short lines, can be impossible to see. But if the object moves relative to the background, its shape is instantly recognized. Even after the motion stops, the percept of the object persists briefly before it fades into the background of random lines. Where in the brain does the percept of the …
Effects Of Ethanol On Anti-Saccade Task Performance., Sarah A Khan, Kristen Ford, Brian Timney, Stefan Everling
Effects Of Ethanol On Anti-Saccade Task Performance., Sarah A Khan, Kristen Ford, Brian Timney, Stefan Everling
Brain and Mind Institute Researchers' Publications
It has been shown that saccade-related neurons in the superior colliculus (SC) display an increased level of prestimulus activity and a higher stimulus-related burst in action potentials preceding direction errors in the anti-saccade task compared with correct anti-saccades. From this, it has been hypothesized that errors occur when the incoming visual signal in the SC passes a threshold and triggers a reflexive saccade. This hypothesis predicts that an attenuated visual signal will reduce the number of direction errors. Since ethanol has been shown to have a suppressive effect on cortical visual event-related potentials (ERPs), the purpose of the present study …
Hierarchical Processing In Spoken Language Comprehension., Matthew H Davis, Ingrid Johnsrude
Hierarchical Processing In Spoken Language Comprehension., Matthew H Davis, Ingrid Johnsrude
Brain and Mind Institute Researchers' Publications
Understanding spoken language requires a complex series of processing stages to translate speech sounds into meaning. In this study, we use functional magnetic resonance imaging to explore the brain regions that are involved in spoken language comprehension, fractionating this system into sound-based and more abstract higher-level processes. We distorted English sentences in three acoustically different ways, applying each distortion to varying degrees to produce a range of intelligibility (quantified as the number of words that could be reported) and collected whole-brain echo-planar imaging data from 12 listeners using sparse imaging. The blood oxygenation level-dependent signal correlated with intelligibility along the …
Normative Data On Cognitive Measures Of Depression., David J A Dozois, Roger Covin, Jay K Brinker
Normative Data On Cognitive Measures Of Depression., David J A Dozois, Roger Covin, Jay K Brinker
Psychology Publications
The assessment of cognition and cognitive change is important for case conceptualization, monitoring the efficacy of specific interventions, and evaluating treatment outcome in cognitive-behavioral therapy. Unfortunately, a paucity of normative data exists on cognitive measures used for psychotherapy outcome research in depression, and little information is available to guide a practitioner's understanding of the magnitude and clinical significance of a patient's cognitive change. This article presents normative data on 6 self-report instruments that assess negative and positive automatic thoughts, hopelessness, cognitive biases and errors, and dysfunctional attitudes. Normative data were derived from studies published from the date of inception of …
The Psychometric Characteristics Of The Hamilton Depression Inventory., David J A Dozois
The Psychometric Characteristics Of The Hamilton Depression Inventory., David J A Dozois
Psychology Publications
In this study, the psychometric properties of the Hamilton Depression Inventory (HDI; Reynolds & Kobak, 1995a) were examined in a sample of 249 undergraduate participants. The HDI exhibited high internal consistency and support for its construct validity was demonstrated by the HDI's patterns of correlations with other measures of depression, anxiety, and depression-relevant cognition. Factor analyses of the full (23-item) and 17-item versions of the HDI each yielded 4 factors, which accounted for 49% and 53% of the variance in participants' responses, respectively. The utility of the HDI's use of multiple-weighted subitems was also assessed by comparing a less complicated …
Classifying Mother-Toddler Attachment Relationships In The Interesting-But-Scary Paradigm: Scoring System For Interactive Behaviour, Lindsey Forbes, Sandi Bento, Carey Anne Deoliveira
Classifying Mother-Toddler Attachment Relationships In The Interesting-But-Scary Paradigm: Scoring System For Interactive Behaviour, Lindsey Forbes, Sandi Bento, Carey Anne Deoliveira
Psychology Publications
No abstract provided.
Relationships Between Human Auditory Cortical Structure And Function, Deborah A Hall, Heledd C Hart, Ingrid Johnsrude
Relationships Between Human Auditory Cortical Structure And Function, Deborah A Hall, Heledd C Hart, Ingrid Johnsrude
Brain and Mind Institute Researchers' Publications
The human auditory cortex comprises multiple areas, largely distributed across the supratemporal plane, but the precise number and configuration of auditory areas and their functional significance have not yet been clearly established. In this paper, we discuss recent research concerning architectonic and functional organisation within the human auditory cortex, as well as architectonic and neurophysiological studies in non-human species, which can provide a broad conceptual framework for interpreting functional specialisation in humans. We review the pattern in human auditory cortex of the functional responses to various acoustic cues, such as frequency, pitch, sound level, temporal variation, motion and spatial location, …
Complexes And Cognitive Complexity: Canadian Contributions To Political Psychology, Paul Nesbitt-Larking
Complexes And Cognitive Complexity: Canadian Contributions To Political Psychology, Paul Nesbitt-Larking
Data and Test Instruments
While it remains a diffuse field of enquiry, political psychology has established itself as an important approach to the analysis of political life. In the United States, political psychology is offered as an optional programme in a number of leading graduate schools and is a recognized subfield of the American Political Science Association. Despite the existence of a number of active political psychologists in Canada, there has been relatively little curiosity about the status of the field. This article offers an account of research in the field. Central to this exploration is an evaluation of the ideological, cultural and substantive …