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1.
Cogn Res Princ Implic ; 9(1): 20, 2024 04 08.
Artículo en Inglés | MEDLINE | ID: mdl-38589710

RESUMEN

In service of the goal of examining how cognitive science can facilitate human-computer interactions in complex systems, we explore how cognitive psychology research might help educators better utilize artificial intelligence and AI supported tools as facilitatory to learning, rather than see these emerging technologies as a threat. We also aim to provide historical perspective, both on how automation and technology has generated unnecessary apprehension over time, and how generative AI technologies such as ChatGPT are a product of the discipline of cognitive science. We introduce a model for how higher education instruction can adapt to the age of AI by fully capitalizing on the role that metacognition knowledge and skills play in determining learning effectiveness. Finally, we urge educators to consider how AI can be seen as a critical collaborator to be utilized in our efforts to educate around the critical workforce skills of effective communication and collaboration.


Asunto(s)
Inteligencia Artificial , Psicología Cognitiva , Humanos , Automatización , Ciencia Cognitiva , Aprendizaje
2.
Exp Psychol ; 68(6): 323-332, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-35258364

RESUMEN

We evaluated the interaction of emotion, interoceptive awareness (IA), and attention using an attentional blink (AB) task. Healthy undergraduates completed a cardiac awareness task and, based on previously validated cut scores, were classified as high or average perceivers (n = 19 in each group; matched on age and gender). Participants completed an AB task with counterbalanced emotional and/or neutral lexical stimuli as the first target (T1) and/or the second target (T2). Both high and average perceivers exhibited retroactive interference in conditions where T2 immediately followed T1. However, only the average perceivers exhibited a significant blink effect: They reported T2 inaccurately in trials in which one intervening stimulus occurred between T1 and T2. High perceivers exhibited their best performance in trials where both targets were emotional; average perceivers exhibited their worst performance in these trials. These results contribute to a small but growing literature that suggests IA and exteroceptive attention are related systems.


Asunto(s)
Parpadeo Atencional , Atención , Emociones , Humanos , Estimulación Luminosa
3.
Cogn Process ; 21(3): 479-491, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32206937

RESUMEN

Investigating the interaction of mood and time perception has provided key information in the mechanisms that underlie cognition and emotion. However, much of the literature that has investigated the role of emotions in time perception has focused on the valence of stimuli, or correlational studies of self-reported mood. In the present study, 31 healthy undergraduates completed a temporal judgment task before and after an autobiographical sad mood induction procedure. In the temporal judgment task, participants identified whether a presented neutral stimulus was onscreen for the same duration as a target (2 s). Along with target trials, very short (1.25 s), short (1.6 s), long (2.25 s), and very long (3.125 s) trials were presented in random order and in equal proportion. Following mood induction, ratings of sadness and fear increased, but returned to baseline at the end of the study. After the mood induction, participants significantly increased temporal overestimation as participants were more likely to affirm short than long-duration trials as matching the target. These results indicate that transient changes in mood in otherwise healthy adults can accelerate the subjective experience of time. Sadness may increase physiological components of time perception that are related approach motivation.


Asunto(s)
Juicio , Tristeza , Adulto , Afecto , Cognición , Emociones , Humanos
4.
HERD ; 13(2): 119-132, 2020 04.
Artículo en Inglés | MEDLINE | ID: mdl-31272235

RESUMEN

The objectives of the research described in this article focus on an understanding of factors that influence creativity in healthcare design. Two areas of emphasis include the personality strengths of successful healthcare architects and elements of the current project delivery process. As part of the research, 48 healthcare architects participated in a battery of personality and creativity tests including Myers/Briggs, The Big Five, the Remote Associates Test (RAT), and an architectural creativity test. Results of the test point to strong "openness" for new ideas, particularly with the designers sampled. As a group, respondents scored low in "narcistic" bias (indicating emotional stability) and did not score high in verbal creativity. Compared to earlier studies of creative architects, the sample group included significantly fewer "perceiver" (Myers/Briggs), associated with a high level of curiosity. A second interesting finding was a significant difference between younger and older architects in the architectural creativity test. One possible hypothesis is the experience of the older architects. A second, and potentially more alarming, hypothesis is that technological disruptions are interfering with the ability to stimulate divergent thinking, particularly in the younger generation raised with smart phones and other network tools. Creativity in healthcare architecture demonstrates the case for domain-specific experience and skills along with creative input from other knowledge domains. The ability to establish group creativity may be inhibited by pressures to condense project time lines and not fully implement lean and other process strategies for exploring alternative solutions. Effective participation in group creativity tasks is particularly important for the complex world of healthcare design.


Asunto(s)
Arquitectura , Creatividad , Personalidad , Factores de Edad , Emociones , Arquitectura y Construcción de Instituciones de Salud , Femenino , Humanos , Masculino
5.
Brain Cogn ; 136: 103593, 2019 11.
Artículo en Inglés | MEDLINE | ID: mdl-31404816

RESUMEN

Recent meta analyses suggest there is a common brain network involved in processing emotion in music and sounds. However, no studies have directly compared the neural substrates of equivalent emotional Western classical music and emotional environmental sounds. Using functional magnetic resonance imaging we investigated whether brain activation in motor cortex, interoceptive cortex, and Broca's language area during an auditory emotional appraisal task differed as a function of stimulus type. Activation was relatively greater to music in motor and interoceptive cortex - areas associated with movement and internal physical feelings - and relatively greater to emotional environmental sounds in Broca's area. We conclude that emotional environmental sounds are appraised through verbal identification of the source, and that emotional Western classical music is appraised through evaluation of bodily feelings. While there is clearly a common core emotion-processing network underlying all emotional appraisal, modality-specific contextual information may be important for understanding the contribution of voluntary versus automatic appraisal mechanisms.


Asunto(s)
Encéfalo/diagnóstico por imagen , Emociones/fisiología , Lenguaje , Música/psicología , Adolescente , Adulto , Encéfalo/fisiología , Mapeo Encefálico , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Adulto Joven
6.
Psychophysiology ; 56(7): e13345, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-30793773

RESUMEN

The current research examined how individuals with depression process emotional, self-relevant stimuli. Across two studies, individuals with depression and healthy controls read stimuli that varied in self-relevance while EEG data were recorded. We examined the late positive potential (LPP), an ERP component that captures the dynamic allocation of attention to motivationally salient stimuli. In Study 1, participants read single words in a passive-viewing task. Participants viewed negative, positive, or neutral words that were either normative or self-generated. Exploratory analyses indicated that participants with depression exhibited affective modulation of the LPP for self-generated stimuli only (both positive and negative) and not for normative stimuli; healthy controls exhibited similar affective modulation of the LPP for both self-relevant and normative stimuli. In Study 2, using a separate sample and a different task, stimuli were provided within the context of sentence stems referring to the self or other people. Participants with depression were more likely to endorse negative self-referent sentences and reject positive ones compared to healthy controls. Depressed participants also exhibited an increased LPP to negative stimuli compared to positive or neutral stimuli. Together, these two studies suggest that depression is characterized by relatively increased sensitivity to affective self-relevant stimuli, perhaps in the context of a broader reduction in emotional reactivity to stimuli that are not self-relevant. Thus, depression may be characterized by a more nuanced pattern based on the degree of stimulus self-relevance than either a global decrease or increase in reactivity to affective stimuli.


Asunto(s)
Atención/fisiología , Encéfalo/fisiopatología , Trastorno Depresivo Mayor/fisiopatología , Emociones/fisiología , Potenciales Evocados/fisiología , Adolescente , Adulto , Trastorno Depresivo Mayor/psicología , Electroencefalografía , Femenino , Humanos , Masculino , Adulto Joven
7.
Cogn Emot ; 32(4): 691-708, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-28649900

RESUMEN

Previous research has found that more embodied insults (e.g. numbskull) are identified faster and more accurately than less embodied insults (e.g. idiot). The linguistic processing of embodied compliments has not been well explored. In the present study, participants completed two tasks where they identified insults and compliments, respectively. Half of the stimuli were more embodied than the other half. We examined the late positive potential (LPP) component of event-related potentials in early (400-500 ms), middle (500-600 ms), and late (600-700 ms) time windows. Increased embodiment resulted in improved response accuracy to compliments in both tasks, whereas it only improved accuracy for insults in the compliment detection task. More embodied stimuli elicited a larger LPP than less embodied stimuli in the early time window. Insults generated a larger LPP in the late time window in the insult task; compliments generated a larger LPP in the early window in the compliment task. These results indicate that electrophysiological correlates of emotional language perception are sensitive to both top-down and bottom-up processes.


Asunto(s)
Emociones/fisiología , Potenciales Evocados/fisiología , Lenguaje , Adolescente , Encéfalo/fisiología , Femenino , Humanos , Masculino , Adulto Joven
8.
J Vis Exp ; (129)2017 11 16.
Artículo en Inglés | MEDLINE | ID: mdl-29286373

RESUMEN

Two dominant theories on lateralized processing of emotional information exist in the literature. One theory posits that unpleasant emotions are processed by right frontal regions, while pleasant emotions are processed by left frontal regions. The other theory posits that the right hemisphere is more specialized for the processing of emotional information overall, particularly in posterior regions. Assessing the different roles of the cerebral hemispheres in processing emotional information can be difficult without the use of neuroimaging methodologies, which are not accessible or affordable to all scientists. Divided visual field presentation of stimuli can allow for the investigation of lateralized processing of information without the use of neuroimaging technology. This study compared central versus divided visual field presentations of emotional images to assess differences in motivated attention between the two hemispheres. The late positive potential (LPP) was recorded using electroencephalography (EEG) and event-related potentials (ERPs) methodologies to assess motivated attention. Future work will pair this paradigm with a more active behavioral task to explore the behavioral impacts on the attentional differences found.


Asunto(s)
Atención/fisiología , Encéfalo/fisiología , Electroencefalografía/métodos , Emociones/fisiología , Motivación/fisiología , Campos Visuales/fisiología , Encéfalo/anatomía & histología , Potenciales Evocados/fisiología , Humanos
9.
Laterality ; 22(5): 541-559, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-27728992

RESUMEN

The motivated attention network is believed to be the system that allocates attention toward motivationally relevant, emotional stimuli in order to better prepare an organism for action [Lang, P. J., Bradley, M. M., & Cuthbert, B. N. (1997). Motivated attention: Affect, activation, and action. In P. J. Lang, R. F. Simons, M. Balaban, & R. Simons (Eds.), Attention and orienting: Sensory and motivational processes (pp. 97-135). Psychology Press]. The late positive potential (LPP), an event-related potential (ERP) that is a manifestation of the motivated attention network, has not been found to reliably differentiate the valence of emotionally relevant stimuli. In two studies, we systematically varied epoch, stimulus arousal, stimulus valence, and hemisphere of presentation (Study 2) to investigate valence effects in the LPP. Both central and divided visual field presentations of emotional stimuli found the LPP to be sustained in later windows for high-arousing unpleasant images compared to pleasant images. Further, this effect was driven by sustained LPP responses following left hemisphere presentations of unpleasant stimuli compared to right. Findings are discussed regarding hemispheric processing of emotion and how lateralized emotion processes might contribute to psychopathology.


Asunto(s)
Nivel de Alerta/fisiología , Encéfalo/fisiología , Emociones/fisiología , Lateralidad Funcional , Motivación/fisiología , Percepción Visual/fisiología , Adolescente , Análisis de Varianza , Atención/fisiología , Electroencefalografía , Potenciales Evocados , Femenino , Humanos , Masculino , Pruebas Neuropsicológicas , Estimulación Luminosa/métodos , Adulto Joven
10.
PLoS One ; 11(9): e0163631, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27649088

RESUMEN

[This corrects the article DOI: 10.1371/journal.pone.0156859.].

11.
PLoS One ; 11(6): e0156859, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27284693

RESUMEN

BACKGROUND: Anterior cingulate cortex (ACC) and striatum are part of the emotional neural circuitry implicated in major depressive disorder (MDD). Music is often used for emotion regulation, and pleasurable music listening activates the dopaminergic system in the brain, including the ACC. The present study uses functional MRI (fMRI) and an emotional nonmusical and musical stimuli paradigm to examine how neural processing of emotionally provocative auditory stimuli is altered within the ACC and striatum in depression. METHOD: Nineteen MDD and 20 never-depressed (ND) control participants listened to standardized positive and negative emotional musical and nonmusical stimuli during fMRI scanning and gave subjective ratings of valence and arousal following scanning. RESULTS: ND participants exhibited greater activation to positive versus negative stimuli in ventral ACC. When compared with ND participants, MDD participants showed a different pattern of activation in ACC. In the rostral part of the ACC, ND participants showed greater activation for positive information, while MDD participants showed greater activation to negative information. In dorsal ACC, the pattern of activation distinguished between the types of stimuli, with ND participants showing greater activation to music compared to nonmusical stimuli, while MDD participants showed greater activation to nonmusical stimuli, with the greatest response to negative nonmusical stimuli. No group differences were found in striatum. CONCLUSIONS: These results suggest that people with depression may process emotional auditory stimuli differently based on both the type of stimulation and the emotional content of that stimulation. This raises the possibility that music may be useful in retraining ACC function, potentially leading to more effective and targeted treatments.


Asunto(s)
Estimulación Acústica/psicología , Trastorno Depresivo Mayor/psicología , Emociones/fisiología , Procesos Mentales/fisiología , Música/psicología , Estimulación Acústica/métodos , Adulto , Encéfalo/fisiopatología , Mapeo Encefálico , Estudios de Casos y Controles , Depresión/psicología , Trastorno Depresivo Mayor/fisiopatología , Femenino , Giro del Cíngulo/fisiopatología , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios , Adulto Joven
12.
Conscious Cogn ; 40: 54-66, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26748026

RESUMEN

The goal of the present study was to explore how anger reduction via a single session of meditation might be measured using psychophysiological methodologies. To achieve this, 15 novice meditators (Experiment 1) and 12 practiced meditators (Experiment 2) completed autobiographical anger inductions prior to, and following, meditation training while respiration rate, heart rate, and blood pressure were measured. Participants also reported subjective anger via a visual analog scale. At both stages, the experienced meditators' physiological reaction to the anger induction reflected that of relaxation: slowed breathing and heart rate and decreased blood pressure. Naïve meditators exhibited physiological reactions that were consistent with anger during the pre-meditation stage, while after meditation training and a second anger induction they elicited physiological evidence of relaxation. The current results examining meditation training show that the naïve group's physiological measures mimicked those of the experienced group following a single session of meditation training.


Asunto(s)
Ira/fisiología , Presión Sanguínea/fisiología , Frecuencia Cardíaca/fisiología , Meditación , Relajación/fisiología , Frecuencia Respiratoria/fisiología , Adolescente , Adulto , Femenino , Humanos , Masculino , Adulto Joven
13.
Laterality ; 21(4-6): 549-567, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-26540191

RESUMEN

Two experiments were conducted to determine if the right hemisphere (RH) plays a central role in understanding sarcasm. In Experiment 1, 48 participants completed a target detection task using dichotically presented phrases that were sincere (message compatible), sarcastic (conflicting semantic and prosodic message), or neutral (no emotional prosody). Sarcastic phrases presented to the left ear (LE)/RH produced faster response times than sarcastic phrases presented to the right ear/left hemisphere. Accuracy results indicated an overall LE/RH advantage for detecting both sarcastic and sincere phrases. Experiment 2 utilized the same task with the addition of event-related potential recording. There was a reliable N400 seen in response to the sarcastic phrases, but only with LE/RH presentation. These results suggest that the RH is particularly sensitive to the mismatch between semantic and prosodic information characterized by sarcasm.

14.
Cogn Emot ; 28(3): 470-92, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24083551

RESUMEN

Depression has been associated with task-relevant increased attention toward negative information, reduced attention toward positive information, or reduced inhibition of task-irrelevant negative information. This study employed behavioural and psychophysiological measures (event-related potentials; ERP) to examine whether groups with risk factors for depression (past depression, current dysphoria) would show attentional biases or inhibitory deficits related to viewing facial expressions. In oddball task blocks, young adult participants responded to an infrequently presented target emotion (e.g., sad) and inhibited responses to an infrequently presented distracter emotion (e.g., happy) in the context of frequently presented neutral stimuli. Previous depression was uniquely associated with greater P3 ERP amplitude following sad targets, reflecting a selective attention bias. Also, dysphoric individuals less effectively inhibited responses to sad distracters than non-dysphoric individuals according to behavioural data, but not psychophysiological data. Results suggest that depression risk may be most reliably characterised by increased attention toward others' depressive facial emotion.


Asunto(s)
Depresión/fisiopatología , Emociones/fisiología , Potenciales Relacionados con Evento P300/fisiología , Expresión Facial , Atención , Femenino , Humanos , Inhibición Psicológica , Masculino , Estimulación Luminosa , Escalas de Valoración Psiquiátrica , Tiempo de Reacción , Adulto Joven
15.
PLoS One ; 7(12): e51474, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-23251547

RESUMEN

Adults and children are spending more time interacting with media and technology and less time participating in activities in nature. This life-style change clearly has ramifications for our physical well-being, but what impact does this change have on cognition? Higher order cognitive functions including selective attention, problem solving, inhibition, and multi-tasking are all heavily utilized in our modern technology-rich society. Attention Restoration Theory (ART) suggests that exposure to nature can restore prefrontal cortex-mediated executive processes such as these. Consistent with ART, research indicates that exposure to natural settings seems to replenish some, lower-level modules of the executive attentional system. However, the impact of nature on higher-level tasks such as creative problem solving has not been explored. Here we show that four days of immersion in nature, and the corresponding disconnection from multi-media and technology, increases performance on a creativity, problem-solving task by a full 50% in a group of naive hikers. Our results demonstrate that there is a cognitive advantage to be realized if we spend time immersed in a natural setting. We anticipate that this advantage comes from an increase in exposure to natural stimuli that are both emotionally positive and low-arousing and a corresponding decrease in exposure to attention demanding technology, which regularly requires that we attend to sudden events, switch amongst tasks, maintain task goals, and inhibit irrelevant actions or cognitions. A limitation of the current research is the inability to determine if the effects are due to an increased exposure to nature, a decreased exposure to technology, or to other factors associated with spending three days immersed in nature.


Asunto(s)
Cognición/fisiología , Creatividad , Vida Silvestre , Adulto , Análisis de Varianza , Femenino , Humanos , Masculino
16.
Cogn Emot ; 26(8): 1359-70, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22650378

RESUMEN

There is evidence of maladaptive attentional biases for lexical information (e.g., Atchley, Ilardi, & Enloe, 2003; Atchley, Stringer, Mathias, Ilardi, & Minatrea, 2007) and for pictographic stimuli (e.g., Gotlib, Krasnoperova, Yue, & Joormann, 2004) among patients with depression. The current research looks for depressotypic processing biases among depressed out-patients and non-clinical controls, using both verbal and pictorial stimuli. A d' measure (sensitivity index) was used to examine each participant's perceptual sensitivity threshold. Never-depressed controls evidenced a detection bias for positive picture stimuli, while depressed participants had no such bias. With verbal stimuli, depressed individuals showed specific decrements in the detection of positive person-referent words (WINNER), but not with positive non-person-referent words (SUNSHINE) or with negative words. Never-depressed participants showed no such differences across word types. In the current study, depression is characterised both by an absence of the normal positivistic biases seen in individuals without mood disorders (consistent with McCabe & Gotlib, 1995), and by a specific reduction in sensitivity for person-referent positive information that might be inconsistent with depressotypic self-schemas.


Asunto(s)
Atención , Percepción Auditiva , Trastorno Depresivo Mayor/psicología , Semántica , Percepción Visual , Estimulación Acústica/métodos , Estimulación Acústica/psicología , Adulto , Ansiedad/psicología , Femenino , Humanos , Masculino , Estimulación Luminosa/métodos , Escalas de Valoración Psiquiátrica/estadística & datos numéricos , Desempeño Psicomotor
17.
Psychol Bull ; 137(6): 998-1028, 2011 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21895353

RESUMEN

Facial affect processing is essential to social development and functioning and is particularly relevant to models of depression. Although cognitive and interpersonal theories have long described different pathways to depression, cognitive-interpersonal and evolutionary social risk models of depression focus on the interrelation of interpersonal experience, cognition, and social behavior. We therefore review the burgeoning depressive facial affect processing literature and examine its potential for integrating disciplines, theories, and research. In particular, we evaluate studies in which information processing or cognitive neuroscience paradigms were used to assess facial affect processing in depressed and depression-susceptible populations. Most studies have assessed and supported cognitive models. This research suggests that depressed and depression-vulnerable groups show abnormal facial affect interpretation, attention, and memory, although findings vary based on depression severity, comorbid anxiety, or length of time faces are viewed. Facial affect processing biases appear to correspond with distinct neural activity patterns and increased depressive emotion and thought. Biases typically emerge in depressed moods but are occasionally found in the absence of such moods. Indirect evidence suggests that childhood neglect might cultivate abnormal facial affect processing, which can impede social functioning in ways consistent with cognitive-interpersonal and interpersonal models. However, reviewed studies provide mixed support for the social risk model prediction that depressive states prompt cognitive hypervigilance to social threat information. We recommend prospective interdisciplinary research examining whether facial affect processing abnormalities promote-or are promoted by-depressogenic attachment experiences, negative thinking, and social dysfunction.


Asunto(s)
Afecto , Trastorno Depresivo/psicología , Expresión Facial , Modelos Psicológicos , Atención , Cognición , Trastorno Depresivo/epidemiología , Susceptibilidad a Enfermedades/epidemiología , Emociones , Humanos , Relaciones Interpersonales , Memoria , Pruebas Neuropsicológicas , Neurociencias , Percepción , Índice de Severidad de la Enfermedad , Conducta Social
18.
Neuropsychologia ; 49(5): 1044-1051, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-21236275

RESUMEN

The individual roles played by the cerebral hemispheres during the process of language comprehension have been extensively studied in tasks that require individuals to read text (for review see Jung-Beeman, 2005). However, it is not clear whether or not some aspects of the theorized laterality models of semantic comprehension are a result of the modality of presentation. Extending earlier work examining lateralized semantic processing using lexically ambiguous words, the current experiments utilized two modified lexical-decision tasks (one fully auditory and one cross-modal) with dichotically presented target stimuli. When targets were presented to the right ear/left hemisphere there was a distinct advantage for detecting words that are associated with the dominant meaning of the ambiguous word over the subordinate meaning. In contrast, for left ear/right hemisphere trials, there was either no difference between the pattern of semantic access for dominant and subordinate meaning (dichotic only) or a processing advantage for the subordinate meaning of the ambiguous word (with cross-modal presentation). These data suggest that the complimentary hemispheric strategies that allow for semantic access are not modality specific and instead characterize how the hemispheres each contribute to comprehension for both speech and text. Thus, dichotic presentation does seem to allow for the study of subtle hemispheric difference in meaning comprehension.


Asunto(s)
Toma de Decisiones/fisiología , Lateralidad Funcional/fisiología , Semántica , Análisis de Varianza , Corteza Cerebral , Femenino , Humanos , Masculino , Pruebas Neuropsicológicas , Tiempo de Reacción/fisiología , Estudiantes , Universidades , Campos Visuales , Vocabulario
19.
Clin Neurophysiol ; 122(7): 1371-81, 2011 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20961804

RESUMEN

OBJECTIVE: The study aimed to utilize behavioral and electrophysiological data to investigate whether depressed patients show an attentional bias in a task that allows for explicit insight into the time course of selective attention processes. METHODS: Event-related potentials (ERPs) were collected from 24 patients with major depressive disorder (MDD) and 25 never-depressed individuals (ND) during a dot-probe task, using pairs of affectively valenced pictures as cues. Cue presentation time was either 100 ms or 500 ms. RESULTS: When the cue presentation time was 500 ms, bias scores for positive-neutral picture pairs (POS-NEU) were negative for the MDD group and positive for the ND group which means ND individuals were able to successfully select positive information. These behavioral effects were supported by ERP results. In the ND group, at the right parietal-occipital region, P1 amplitude during valid POS-NEU pairs was significantly larger than that during invalid POS-NEU pairs; this pattern did not appear in the MDD group. CONCLUSIONS: These results suggest that MDD patients are characterized by a deficit in protection bias, meaning that these participants cannot avoid attending to negative information in their environment, but only when negative stimuli are presented for a sufficient period of time. SIGNIFICANCE: Attentional bias is modulated by duration of emotional pictures presentation in depression.


Asunto(s)
Atención/fisiología , Trastorno Depresivo Mayor/fisiopatología , Trastorno Depresivo Mayor/psicología , Potenciales Evocados/fisiología , Adulto , Señales (Psicología) , Electroencefalografía , Emociones/fisiología , Femenino , Fijación Ocular/fisiología , Lateralidad Funcional/fisiología , Humanos , Masculino , Estimulación Luminosa , Escalas de Valoración Psiquiátrica , Desempeño Psicomotor/fisiología , Tiempo de Reacción/fisiología , Reproducibilidad de los Resultados , Adulto Joven
20.
Neuropsychology ; 24(1): 130-8, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20063954

RESUMEN

Positive schizotypal traits have been associated with right hemisphere activation. Previous research has indicated that the left and right hemispheres differ in their processing of semantic ambiguity; specifically, given sufficient time, the left hemisphere primes dominant meanings and inhibits subordinate meanings, and the right hemisphere primes both dominant and subordinate meanings. The authors examined whether individuals who differed in positive schizotypy demonstrated different patterns of priming on a semantic ambiguity task, reflective of differences in hemispheric activation. Individuals low in schizotypy demonstrated the expected pattern of priming the dominant meaning while inhibiting the subordinate meaning. Individuals high in schizotypy demonstrated similar priming of the dominant meaning but no inhibition of the subordinate meaning. The role of this failure of inhibition in the generation of schizotypal thought is discussed.


Asunto(s)
Encéfalo/fisiopatología , Lateralidad Funcional/fisiología , Trastorno de la Personalidad Esquizotípica/diagnóstico , Trastorno de la Personalidad Esquizotípica/fisiopatología , Semántica , Adolescente , Adulto , Análisis de Varianza , Femenino , Humanos , Masculino , Tiempo de Reacción/fisiología , Sensibilidad y Especificidad , Encuestas y Cuestionarios , Adulto Joven
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