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Attentional capture by previously reward-associated stimuli has predominantly been measured in the visual domain. Recently, behavioral studies of value-driven attention have demonstrated involuntary attentional capture by previously reward-associated sounds, emulating behavioral findings within the visual domain and suggesting a common mechanism of attentional capture by value across sensory modalities. However, the neural correlates of the modulatory role of learned value on the processing of auditory information has not been examined. Here, we conducted a neuroimaging study on human participants using a previously established behavioral paradigm that measures value-driven attention in an auditory target identification task. We replicate behavioral findings of both voluntary prioritization and involuntary attentional capture by previously reward-associated sounds. When task-relevant, the selective processing of high-value sounds is supported by reduced activation in the dorsal attention network of the visual system (FEF, intraparietal sulcus, right middle frontal gyrus), implicating cross-modal processes of biased competition. When task-irrelevant, in contrast, high-value sounds evoke elevated activation in posterior parietal cortex and are represented with greater fidelity in the auditory cortex. Our findings reveal two distinct mechanisms of prioritizing reward-related auditory signals, with voluntary and involuntary modes of orienting that are differently manifested in biased competition.
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Lóbulo Parietal , Recompensa , Lóbulo Frontal , Humanos , AprendizajeRESUMEN
Neural networks for the processing of appetitive and aversive information, in isolation, have been well characterized. However, how the brain integrates competing signals associated with simultaneous appetitive and aversive information is less clear. In particular, it is unknown how the presence of concurrent reward modulates the processing of an aversive event throughout the brain. Here, we utilized a four-armed bandit task in an fMRI study to measure the representation of an aversive electric shock with and without the simultaneous receipt of monetary reward. Using a region of interest (ROI) approach, we first identified regions activated by the experience of aversive electric shock, and then measured how this shock-related activation is modulated by concurrent reward using independent data. Informed by prior literature and our own preliminary data, analyses focused on the dorsolateral prefrontal cortex, anterior and posterior insula, anterior cingulate cortex, and the thalamus and somatosensory cortex. We hypothesized that the neural response to punishment in these ROIs would be attenuated by the presence of concurrent reward. However, we found no evidence of concurrent reward attenuating the neural response to punishment in any ROI and also no evidence of concurrent punishment attenuating the neural response to reward in exploratory analyses. Altogether, our findings are consistent with the idea that neural networks responsible for the processing of reward and punishment signals are largely independent of one another, and that representations of overall value or utility are arrived at through the integration of separate reward and punishment signals at later stages of information processing.
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Encéfalo/fisiología , Procesos Mentales/fisiología , Castigo/psicología , Recompensa , Adolescente , Adulto , Encéfalo/diagnóstico por imagen , Mapeo Encefálico , Toma de Decisiones/fisiología , Electrochoque , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Red Nerviosa/diagnóstico por imagen , Red Nerviosa/fisiología , Adulto JovenRESUMEN
Interleukin-2 (IL-2) therapy has been demonstrated to induce responses in 10-20% of advanced melanoma and renal cell carcinoma patients, which translates into durable remissions in up to half of the responsers. Unfortunately the use of IL-2 has been associated with severe toxicity and death. It has been previously observed and reported that IL-2 therapy causes a major drop in circulating levels of ascorbic acid (AA). The IL-2 induced toxicity shares many features with sepsis such as capillary leakage, systemic complement activation, and a relatively non-specific rise in inflammatory mediators such as TNF-alpha, C-reactive protein, and in advanced cases organ failure. Animal models and clinical studies have shown rapid depletion of AA in conditions of sepsis and amelioration associated with administration of AA (JTM 9:1-7, 2011). In contrast to other approaches to dealing with IL-2 toxicity, which may also interfere with therapeutic effects, AA possesses the added advantage of having direct antitumor activity through cytotoxic mechanisms and suppression of angiogenesis. Here we present a scientific rationale to support the assessment of intravenous AA as an adjuvant to decrease IL-2 mediated toxicity and possibly increase treatment efficacy.
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Ácido Ascórbico/uso terapéutico , Inmunoterapia , Interleucina-2/uso terapéutico , Humanos , Infusiones Intravenosas , Estrés OxidativoRESUMEN
In the field of psychological science, behavioral performance in computer-based cognitive tasks often exhibits poor reliability. The absence of reliable measures of cognitive processes contributes to non-reproducibility in the field and impedes investigation of individual differences. Specifically in visual search paradigms, response time-based measures have shown poor test-retest reliability and internal consistency across attention capture and distractor suppression, but one study has demonstrated the potential for oculomotor measures to exhibit superior reliability. Therefore, in this study, we investigated three datasets to compare the reliability of learning-dependent distractor suppression measured via distractor fixations (oculomotor capture) and latency to fixate the target (fixation times). Our findings reveal superior split-half reliability of oculomotor capture compared to that of fixation times regardless of the critical distractor comparison, with the reliability of oculomotor capture in most cases falling within the range that is acceptable for the investigation of individual differences. We additionally find that older adults have superior oculomotor reliability compared with young adults, potentially addressing a significant limitation in the aging literature of high variability in response time measures due to slower responses. Our findings highlight the utility of measuring eye movements in the pursuit of reliable indicators of distractor processing and the need to further test and develop additional measures in other sensory domains to maximize statistical power, reliability, and reproducibility.
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The common cold, the flu, and the 2019 coronavirus disease (COVID-19) have many symptoms in common. As such, without testing for severe-acute-respiratory-syndrome-related coronavirus 2 (SARS-CoV-2), it is difficult to conclude whether or not one is infected with SARS-CoV-2. The aim of the current study was to compare the presence and severity of COVID-19-related symptoms among those who tested positive or negative for the beta variant of SARS-CoV-2 (B.1.351) and identify the clinical presentation with the greatest likelihood of testing positive for SARS-CoV-2. n = 925 individuals that were tested for SARS-CoV-2 at Dutch mass testing sites (i.e., test streets) were invited to complete a short online survey. The presence and severity of 17 COVID-19-related symptoms were assessed. In addition, mood, health correlates, and quality of life were assessed for the week before the test. Of the sample, n = 88 tested positive and n = 837 tested negative for SARS-CoV-2. Individuals who tested positive for SARS-CoV-2 reported experiencing a significantly greater number, as well as greater overall symptom severity, compared to individuals who tested negative for SARS-CoV-2. A binary logistic regression analysis revealed that increased severity levels of congestion, coughing, shivering, or loss of smell were associated with an increase in the odds of testing positive for SARS-CoV-2, whereas an increase in the severity levels of runny nose, sore throat, or fatigue were associated with an increase in the odds of testing negative for SARS-CoV-2. No significant differences in mood or health correlates were found between those who tested positive or negative for SARS-CoV-2, except for a significantly higher stress score among those who tested negative for SARS-CoV-2. In conclusion, individuals that tested positive for SARS-CoV-2 experienced a significantly greater number and more severe COVID-19-related symptoms compared to those who tested negative for SARS-CoV-2. Experiencing shivering and loss of smell may be the best indicators for increased likelihood of testing positive for SARS-CoV-2.
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COVID-19 , SARS-CoV-2 , Humanos , COVID-19/diagnóstico , COVID-19/virología , Masculino , Femenino , Adulto , SARS-CoV-2/aislamiento & purificación , Persona de Mediana Edad , Calidad de Vida , Índice de Severidad de la Enfermedad , Países Bajos/epidemiología , Adulto Joven , Anciano , Encuestas y Cuestionarios , Prueba de COVID-19/métodos , Adolescente , Anosmia/diagnóstico , Anosmia/virología , Tos/virologíaRESUMEN
Anxiety sensitivity (AS) - characterized by a persistent fear that arousal-related bodily sensations will lead to serious cognitive, physical, and/or social consequences - is associated with various psychopathologies, including depressive symptoms and binge eating. This 3-week, 3-wave longitudinal study examined the relation between AS (including its global AS factor and lower-order AS cognitive, physical, and social concern dimensions), depressive symptoms, and binge eating among 410 undergraduates from two universities. Using generalized estimating equation models, we found that global AS, AS social concerns, and depressive symptoms predicted binge eating during any given week. Mediation analyses showed that global AS (as a latent variable with its lower-order AS dimensions as indicators), AS cognitive concerns, and AS physical concerns at Wave 1 predicted subsequent increases in depressive symptoms at Wave 2, which, in turn, led to increases in binge eating at Wave 3. Findings contribute to a better understanding of the interplay between AS, depressive symptoms, and binge eating, highlighting the role of binge eating as a potential coping mechanism for individuals with high AS, particularly in managing depressive symptoms. This study underscores the importance of AS-targeted intervention and prevention efforts in addressing depressive symptoms and binge eating.
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Trastorno por Atracón , Bulimia , Humanos , Trastorno por Atracón/psicología , Estudios Longitudinales , Depresión/psicología , Bulimia/psicología , AnsiedadRESUMEN
Reward learning has been shown to habitually guide overt spatial attention to specific regions of a scene. However, the neural mechanisms that support this bias are unknown. In the present study, participants learned to orient themselves to a particular quadrant of a scene (a high-value quadrant) to maximize monetary gains. This learning was scene-specific, with the high-value quadrant varying across different scenes. During a subsequent test phase, participants were faster at identifying a target if it appeared in the high-value quadrant (valid), and initial saccades were more likely to be made to the high-value quadrant. fMRI analyses during the test phase revealed learning-dependent priority signals in the caudate tail, superior colliculus, frontal eye field, anterior cingulate cortex, and insula, paralleling findings concerning feature-based, value-driven attention. In addition, ventral regions typically associated with scene selection and spatial information processing, including the hippocampus, parahippocampal gyrus, and temporo-occipital cortex, were also implicated. Taken together, our findings offer new insights into the neural architecture subserving value-driven attention, both extending our understanding of nodes in the attention network previously implicated in feature-based, value-driven attention and identifying a ventral network of brain regions implicated in reward's influence on scene-dependent spatial orienting.
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Encéfalo , Aprendizaje , Humanos , Encéfalo/diagnóstico por imagen , Lóbulo Occipital , Imagen por Resonancia Magnética , Giro del Cíngulo , Mapeo EncefálicoRESUMEN
This study investigated potential differences in baseline (i.e., non-hangover-related) levels of depression, anxiety, and stress between individuals who are sensitive to and those resistant to hangovers after consuming alcohol. Participants included 5111 university students from the Netherlands and the U.K., including 3205 hangover-sensitive and 1906 hangover-resistant drinkers. All participants completed surveys on their demographics, alcohol consumption, and hangover susceptibility (whether they experienced a hangover in the past 12 months), as well as their baseline levels of depression, anxiety, and stress on the DASS-21 scale. The results showed that hangover-sensitive drinkers had significantly higher levels of anxiety and stress, but not depression, compared to hangover-resistant drinkers. However, the observed differences between the two groups were small, with a magnitude of less than 1 out of 42 points on the DASS-21 anxiety and stress subscales, and are thus unlikely to be clinically meaningful.
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Perfectionism is linked to a range of psychopathology, including binge eating. Our study enhanced understanding of the role maternal perfectionistic concerns play in the maintenance of binge eating in emerging adult daughters. A sample of 73 mother-daughter dyads (mean age = 49.51 years for mothers and 19.89 years for daughters) reported on perfectionistic concerns (composite of doubt about actions and concern over mistakes), binge eating, and binge drinking (composite of frequency, severity, and perceptions). Using actor-partner interdependence modelling, mothers' and daughters' perfectionistic concerns were positively associated with their own binge eating (actor effects). Mothers' perfectionistic concerns were positively associated with daughters' binge eating (partner effect), but not vice versa. Perfectionistic concerns did not show significant actor or partner associations with binge drinking, supporting the specificity of our model. Findings suggest binge eating has characterological and interpersonal antecedents.
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Consumo Excesivo de Bebidas Alcohólicas , Trastorno por Atracón , Bulimia , Perfeccionismo , Femenino , Adulto , Humanos , Persona de Mediana Edad , Madres , Núcleo Familiar , Relaciones Madre-HijoRESUMEN
In early 2020, schools across Canada closed due to the COVID-19 pandemic, requiring parents to homeschool their children. We examined the association between homeschooling and romantic conflict among couples during the COVID-19 pandemic. Canadian couples (N = 756) completed online measures, including whether they were homeschooling, hours spent homeschooling, and romantic conflict during the month of April 2020. Two hundred ten couples (27.8%) reported that they were homeschooling their children during this period, with 173 (22.9%) couples homeschooling due to the pandemic. Multilevel regressions were used to examine the association between homeschooling status and romantic conflict, and actor-partner interdependence models (APIMs) were used to examine the association between homeschooling hours and romantic conflict among homeschoolers. In our APIM analyses, significant links between hours spent homeschooling and romantic conflict were observed, even when controlling for demographic variables. We found significant actor effects, where an individual's own homeschooling hours were positively related to the conflict they enacted toward their partner, and significant partner effects, where the partner's homeschooling hours were positively related to conflict received by the individual. Among all couples, we found significant positive associations between homeschooling status (i.e., nonhomeschooler or homeschooler) and both types of romantic conflict. However, these associations were nonsignificant when controlling for demographic variables. Our findings suggest the number of hours spent in homeschooling may be an important contributor to romantic conflict between partners during the pandemic. We discuss implications for schools and governments in providing additional support for families homeschooling children during mandated school closures. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
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COVID-19 , Parejas Sexuales , Niño , Humanos , Parejas Sexuales/psicología , Pandemias , Canadá , Instituciones AcadémicasRESUMEN
The attentional priority of a stimulus is influenced by both its relationship to task goals and reward history. While experiments probing goal-directed visual search typically dictate which stimuli should receive attentional priority by virtue of highly constrained task demands, individuals in real-world scenarios choose what to search for. In such complex and dynamic environments, it is unclear how reward history might influence the strategic control of attention. In the present study, participants completed a modified version of the Adaptive Choice Visual Search (ACVS) task integrated with the value-driven attentional capture design. In a training phase, participants learned to associate one of two possible target colors with monetary reward. In a subsequent test phase, they completed the ACVS task in which a target in both a previously rewarded and unrewarded color was present on each trial and participants could choose how to search. Our results reveal that participants were biased to voluntarily search through the previously reward-associated color regardless of whether the distribution of stimuli made it optimal to do so, which came at a cost in performance when searching through the previously rewarded color was a suboptimal strategy. In the absence of prior reward training, in contrast, search strategy was inconsistent with respect to color. Our findings provide evidence that reward history biases voluntary search processes.
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Objetivos , Recompensa , Atención , Humanos , Motivación , Tiempo de ReacciónRESUMEN
Sports betting is one of the most popular forms of gambling in Canada; recent prevalence estimates indicate that 7.9% of Canadian adults endorsed gambling on sports in the past year. The ongoing COVID-19 pandemic led to the temporary closure of most major sports leagues worldwide beginning in March of 2020. These sudden closures created a dramatic decrease in the availability of sports betting opportunities in the early stages of the pandemic, followed by a subsequent increase in availability as most sport leagues returned during the summer of 2020. Using a retrospective self-report measure of gambling participation, the present study investigated how the gambling behaviors of N = 85 past-year sports gamblers changed over the course of the pandemic. It was hypothesized that sports gamblers would report an initial decrease in gambling behaviors from pre-pandemic baseline levels to the early stages of the pandemic in May of 2020 when the availability of sports gambling was heavily restricted, followed by an increase in gambling behaviors from May to August, in accordance with the re-emergence of live sporting events. The general pattern of results supported the hypotheses, though gambling behaviors did not completely return to baseline levels. Beyond quantifying the changes in gambling behaviors over the early stages of the pandemic in Canada, results may have implications regarding the utility of voluntary gambling exclusion programs as well as legislation concerning gambling access.
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Attention is biased toward features aligning with task goals and stimuli previously allocated attentional priority (selection history). The relationship between selection history and the strategic control of attention has scarcely been explored. In the present study, we utilized a modified version of the Adaptive Choice Visual Search (ACVS) task to determine whether the choice of visual search strategy varies with the strategies participants have elected to use in the past. Participants were tasked with searching through stimuli presented in two task-relevant colors on each trial to find one of two targets. The distribution of stimuli rendered in these two colors was manipulated between subjects, with one group receiving more imbalanced displays during learning. Participants who experienced the more imbalanced displays quickly learned the optimal visual search strategy of searching through the less abundant color, which maximized performance. Critically, these participants retained their tendency toward this learned strategy in a subsequent test phase in which displays were less imbalanced, in contrast to participants who completed the same test phase but had only experienced the less imbalanced displays. Our results demonstrate that, without explicit instruction, the choice of visual search strategy is to some degree dependent upon selection history. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
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INTRODUCTION: Drinkers have social and affective reasons for using alcohol ('drinking motives'). Historically, drinking motives are self-reported. Informant-reports of drinking motives may be useful in corroborating self-report data. Thus, we investigated the correspondence between self- and informant-reports of drinking motives and the incremental validity of informant-reported motives in predicting targets' future alcohol problems. METHODS: Measures were completed by 174 university-aged, same-sex drinking buddy dyads (66% women) across two waves separated by 30 days. Dyad members who contacted study organisers were treated as targets, and their buddies as informants. Targets self-reported their own drinking motives at baseline, as well as their own alcohol problems at baseline and 30 days later. Informants reported on targets' drinking motives at baseline. RESULTS: Self- and informant-reports of targets' internal drinking motives (coping-depression and enhancement) showed significant, small positive correlations. Informants-reports of these same internal drinking motives (as well as coping-anxiety) predicted change in targets' alcohol problems over time, thereby providing additional predictive validity beyond that provided by targets' self-reports. DISCUSSION AND CONCLUSIONS: We encourage incorporating informant-reported internal drinking motives when assessing risk for escalating problem drinking in emerging adult drinkers.
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Consumo de Bebidas Alcohólicas , Trastornos Relacionados con Alcohol , Adaptación Psicológica , Adulto , Anciano , Consumo de Bebidas Alcohólicas/psicología , Trastornos Relacionados con Alcohol/psicología , Femenino , Humanos , Masculino , Motivación , Encuestas y Cuestionarios , UniversidadesRESUMEN
Heavy episodic drinking (or binge drinking) is a significant public health concern. Self-medication using alcohol is often thought to explain the co-occurrence of heavy episodic drinking with depression and anxiety. Yet, there is little longitudinal work examining both depressive and anxiety symptoms and how they are independently related to heavy episodic drinking in adult community samples. To this end, we invited adult community members (N = 102) to come to the lab to complete validated measures of depressive symptoms (composite of CES-D-SF, SCL-90-D, and DASS-21-D), anxiety symptoms (DASS-21-A), and heavy episodic drinking (composite of frequency, severity, and perceptions) at baseline, and again three and six months later. Using a three-wave cross-lagged panel model, we tested reciprocal relations between heavy episodic drinking and each internalizing symptom. We found strong temporal stability in our study variables. Depressive symptoms were associated with increases in heavy episodic drinking, and anxiety symptoms were associated with decreases in heavy episodic drinking. In contrast, heavy episodic drinking did not predict either internalizing symptom over time. Results are consistent with the notion that individuals with greater depressive symptoms use alcohol to self-medicate, and that anxiety symptoms (particularly autonomic arousal) may be potentially protective against future heavy episodic drinking.
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Ansiedad , Depresión , Adulto , Consumo de Bebidas Alcohólicas/epidemiología , Ansiedad/epidemiología , Trastornos de Ansiedad , Depresión/epidemiología , Etanol , Humanos , Estudios LongitudinalesRESUMEN
Modern slot machines are among the more harmful forms of gambling. Psychophysiological measures may provide a window into mental processes that underpin these harms. Here we investigated pupil dilation derived from eye tracking as a means of capturing changes in sympathetic nervous system arousal following outcomes on a real slot machine. We hypothesized that positively reinforcing slot machine outcomes would be associated with increases in arousal, reflected in larger pupil diameter. We further examined the contribution of game luminance fluctuations on pupil diameter. In Experiment 1A, experienced slot machine gamblers (N = 53) played a commercially-available slot machine in a laboratory for 20 minutes while wearing mobile eye tracking glasses. Analyses differentiated loss outcomes, wins, losses-disguised-as-wins, and (free-spin) bonus features. Bonus features were associated with rapid increases in pupil diameter following the onset of outcome-related audiovisual feedback, relative to losses. In Experiment 1B, luminance data were extracted from captured screen videos (derived from Experiment 1A) to characterize on-screen luminance changes that could modulate pupil diameter. Bonus features and wins were associated with pronounced and complex fluctuations in screen luminance (≈50 L and ≈25L, respectively). However, the pupil dilation that was observed to bonus features in Experiment 1A coincided temporally with only negligible changes in screen luminance, providing partial evidence that the pupil dilation to bonus features may be due to arousal. In Experiment 2, 12 participants viewed pairs of stimuli (scrambled slot machine images) at luminance difference thresholds of ≈25L, ≈50L, and ≈100L. Scrambled images presented at luminance differences of ≈25L and greater were sufficient to cause pupillary responses. Overall, pupillometry may detect event-related changes in sympathetic nervous system arousal following gambling outcomes, but researchers must pay careful attention to substantial in-game luminance changes that may confound arousal-based interpretations.
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Juego de Azar , Nivel de Alerta/fisiología , Humanos , PupilaRESUMEN
The present study aimed to determine whether attentional prioritization of visual stimuli associated with punishment transfers across conceptual knowledge independently of physical features. Participants performed a Stroop task in which words were presented individually. These stimuli consisted of four pairs of synonyms selected such that the two words of each pair have both a strong semantic association and no perceptual similarity. In the learning phase, two words (from two different pairs) were associated with shock independently of performance; all the other words were never paired with shock. In the subsequent test phase, no shock was delivered. Results are consistent with semantic generalization of punishment-related attentional priority; synonyms of words paired with shock produced a Stroop interference effect (i.e., slower response times) in learning and test phases, relative to synonyms of words not paired with shock, suggesting they were prioritized by attention.
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Studies on attentional bias have overwhelmingly focused on the priority of different stimuli and have rarely manipulated the state of the observer. Recently, the threat of unpredictable shock has been utilized to experimentally induce anxiety and investigate how negative arousal modulates attentional control. Experimentally induced anxiety has been shown to reduce the attentional priority afforded to reward-related stimuli while enhancing the efficiency of goal-directed attentional control. It is unclear which of these two influences might dominate when attending to reward-related stimuli is consistent with task goals and by extension what the scope of the modulatory influence of threat on attention is. In contrast to paradigms in the visual domain, a novel auditory identification task has demonstrated a robust influence of target-value associations on selective attention. In the present study, we examined how the threat of shock modulates the influence of learned value on voluntary attention. In both threat and no-threat conditions, we replicate prior findings of voluntary prioritization of reward-associated sounds. However, unlike in studies measuring involuntary attentional capture, threat did not modulate the influence of reward on attention. Our findings highlight important limitations to when and how threat modulates the control of attention, contextualizing prior findings.
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Atención , Motivación , Humanos , Aprendizaje , Tiempo de Reacción , RecompensaRESUMEN
Previously reward-associated stimuli have consistently been shown to involuntarily capture attention in the visual domain. Although previously reward-associated but currently task-irrelevant sounds have also been shown to interfere with visual processing, it remains unclear whether such stimuli can interfere with the processing of task-relevant auditory information. To address this question, we modified a dichotic listening task to measure interference from task-irrelevant but previously reward-associated sounds. In a training phase, participants were simultaneously presented with a spoken letter and number in different auditory streams and learned to associate the correct identification of each of three letters with high, low, and no monetary reward, respectively. In a subsequent test phase, participants were again presented with the same auditory stimuli but were instead instructed to report the number while ignoring spoken letters. In both the training and test phases, response time measures demonstrated that attention was biased in favour of the auditory stimulus associated with high value. Our findings demonstrate that attention can be biased towards learned reward cues in the auditory domain, interfering with goal-directed auditory processing.
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Objetivos , Recompensa , Atención , Percepción Auditiva , Humanos , Tiempo de ReacciónRESUMEN
The last ten years of attention research have witnessed a revolution, replacing a theoretical dichotomy (top-down vs. bottom-up control) with a trichotomy (biased by current goals, physical salience, and selection history). This third new mechanism of attentional control, selection history, is multifaceted. Some aspects of selection history must be learned over time whereas others reflect much more transient influences. A variety of different learning experiences can shape the attention system, including reward, aversive outcomes, past experience searching for a target, targetânon-target relations, and more. In this review, we provide an overview of the historical forces that led to the proposal of selection history as a distinct mechanism of attentional control. We then propose a formal definition of selection history, with concrete criteria, and identify different components of experience-driven attention that fit within this definition. The bulk of the review is devoted to exploring how these different components relate to one another. We conclude by proposing an integrative account of selection history centered on underlying themes that emerge from our review.