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https://www.readbyqxmd.com/read/28551393/content-specificity-of-attentional-bias-to-threat-in-post-traumatic-stress-disorder
#1
A Zinchenko, M M Al-Amin, M M Alam, W Mahmud, N Kabir, H M Reza, T H J Burne
BACKGROUND: Attentional bias to affective information and reduced cognitive control may maintain the symptoms of post-traumatic stress disorder (PTSD) and impair cognitive functioning. However, the role of content specificity of affective stimuli (e.g., trauma-related, emotional trauma-unrelated) in the observed attentional bias and cognitive control is less clear, as this has not been tested simultaneously before. Therefore, we examined the content specificity of attentional bias to threat in PTSD...
May 18, 2017: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/28549796/development-of-the-error-monitoring-system-from-ages-9-35-unique-insight-provided-by-mri-constrained-source-localization-of-eeg
#2
George A Buzzell, John E Richards, Lauren K White, Tyson V Barker, Daniel S Pine, Nathan A Fox
The ability to self-detect errors and dynamically adapt behavior is a cornerstone of higher-level cognition, requiring coordinated activity from a network of neural regions. However, disagreement exists over how the error-monitoring system develops throughout adolescence and early adulthood. The present report leveraged MRI-constrained EEG source localization to detail typical development of the error-monitoring system in a sample of 9-35 year-olds (n=43). Participants performed a flanker task while high-density EEG was recorded; structural MRIs were also acquired for all participants...
May 23, 2017: NeuroImage
https://www.readbyqxmd.com/read/28549353/crowding-visual-awareness-and-their-respective-neural-loci
#3
Kilho Shin, Susana T L Chung, Bosco S Tjan
In peripheral vision, object identification can be impeded when a target object is flanked by other objects. This phenomenon of crowding has been attributed to basic processes associated with image encoding by the visual system, but the neural origin of crowding is not known. Determining whether crowding depends on subjective awareness of the flankers can provide information on the neural origin of crowding. However, recent studies that manipulated flanker awareness have yielded conflicting results. In the current study, we suppressed flanker awareness with two methods: interocular suppression (IOS) and adaptation-induced blindness (AIB)...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28549279/control-adjustments-in-speaking-electrophysiology-of-the-gratton-effect-in-picture-naming
#4
Natalia Shitova, Ardi Roelofs, Herbert Schriefers, Marcel Bastiaansen, Jan-Mathijs Schoffelen
Accumulating evidence suggests that spoken word production requires different amounts of top-down control depending on the prevailing circumstances. For example, during Stroop-like tasks, the interference in response time (RT) is typically larger following congruent trials than following incongruent trials. This effect is called the Gratton effect, and has been taken to reflect top-down control adjustments based on the previous trial type. Such control adjustments have been studied extensively in Stroop and Eriksen flanker tasks (mostly using manual responses), but not in the picture-word interference (PWI) task, which is a workhorse of language production research...
April 29, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28539893/more-than-attentional-tuning-investigating-the-mechanisms-underlying-practice-gains-and-preparation-in-task-switching
#5
Mike Wendt, Stina Klein, Tilo Strobach
In task switching, participants perform trials of task repetitions (i.e., the same task is executed in consecutive trials) and task switches (i.e., different tasks are executed in consecutive trials) and the longer reaction times in switch trials in comparison to these times in repetition trials are referred to as switch costs. These costs are reduced by lengthening of an interval following a cue that indicates the upcoming task; this effect demonstrated effective task preparation. To investigate the role of task switching practice for these preparation effects and task switch costs, we applied a task switching paradigm, involving two digit classification tasks, in six successive practice sessions and varied the length of the preparation interval...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28536543/adoption-of-task-specific-sets-of-visual-attention
#6
Mike Wendt, Svantje T Kähler, Aquiles Luna-Rodriguez, Thomas Jacobsen
Evidence from behavioral and physiological studies suggests attentional weighting of stimulus information from different sources, according to task demands. We investigated the adoption of task-specific attentional sets by administering a flanker task, which required responding to a centrally presented letter while ignoring two adjacent letters, and a same-different judgment task, which required a homogenous/heterogeneous classification concerning the complete three-letter string. To assess the distribution of attentional weights across the letter locations we intermixed trials of a visual search task, in which a target stimulus occurred randomly in any of these locations...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28533954/exercise-and-dietary-program-induced-weight-reduction-is-associated-with-cognitive-function-among-obese-adolescents-a-longitudinal-study
#7
Chun Xie, Xiaochun Wang, Chenglin Zhou, Chang Xu, Yu-Kai Chang
OBJECTIVE: The present study was to determine the effect of a combined exercise and dietary program on cognitive function as well as the relationship between the program-induced weight change and cognitive function alterations. DESIGN: The study applies a quasi-experimental design. METHODS: Fifty-eight adolescents with obese status (body mass index, BMI >28 kg/m(2)) were assigned to either an experiment (n = 30) or control group (n = 28)...
2017: PeerJ
https://www.readbyqxmd.com/read/28528704/from-neuro-pigments-to-neural-efficiency-the-relationship-between-retinal-carotenoids-and-behavioral-and-neuroelectric-indices-of-cognitive-control-in-childhood
#8
Anne M Walk, Naiman A Khan, Sasha M Barnett, Lauren B Raine, Arthur F Kramer, Neal J Cohen, Christopher J Moulton, Lisa M Renzi-Hammond, Billy R Hammond, Charles H Hillman
Lutein and zeaxanthin are plant pigments known to preferentially accumulate in neural tissue. Macular Pigment Optical Density (MPOD), a non-invasive measure of retinal carotenoids and surrogate measure of brain carotenoid concentration, has been associated with disease prevention and cognitive health. Superior MPOD status in later adulthood has been shown to provide neuroprotective effects on cognition. Given that childhood signifies a critical period for carotenoid accumulation in brain, it is likely that the beneficial impact would be evident during development, though this relationship has not been directly investigated...
May 18, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28527207/beyond-a-differential-diagnosis-cognitive-and-morphometric-decoding-of-information-processing-speed-in-senior-adults-with-dsm-5-mild-neurocognitive-disorders
#9
Hanna Lu, Sandra S M Chan, Ada W T Fung, Linda C W Lam
BACKGROUND: Processing speed has been highlighted as a diagnostic item for neurocognitive disorders (NCD) in DSM-5. The utility of information processing speed (IPS) enclosed with multiscale constructs in the diagnosis of NCD warrants exploration. OBJECTIVE: We aimed to investigate the IPS with two types of measurements in the patients with NCD due to vascular disease (NCD-vascular) and NCD due to Alzheimer's disease (NCD-AD), and examine the associations between IPS measures and morphometric features...
May 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28505262/the-basal-ganglia-striosomes-affect-the-modulation-of-conflicts-by-subliminal-information-evidence-from-x-linked-dystonia-parkinsonism
#10
Christian Beste, Moritz Mückschel, Raymond Rosales, Aloysius Domingo, Lillian Lee, Arlene Ng, Christine Klein, Alexander Münchau
Cognitive control is relevant when distracting information induces behavioral conflicts. Such conflicts can be produced consciously and by subliminally processed information. Interestingly, both sources of conflict interact suggesting that they share neural mechanisms. Here, we ask whether conjoint effects between different sources of conflict are modulated by microstructural basal ganglia dysfunction. To this end, we carried out an electroencephalography study and examined event-related potentials (ERPs) including source localization using a combined flanker-subliminal priming task in patients with X-linked dystonia Parkinsonism (XDP) and a group of healthy controls...
May 13, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28501539/spatiotemporal-oscillatory-dynamics-of-visual-selective-attention-during-a-flanker-task
#11
Timothy J McDermott, Alex I Wiesman, Amy L Proskovec, Elizabeth Heinrichs-Graham, Tony W Wilson
The flanker task is a test of visual selective attention that has been widely used to probe error monitoring, response conflict, and related constructs. However, to date, few studies have focused on the selective attention component of this task and imaged the underlying oscillatory dynamics serving task performance. In this study, 21 healthy adults successfully completed an arrow-based version of the Eriksen flanker task during magnetoencephalography (MEG). All MEG data were pre-processed and transformed into the time-frequency domain...
May 10, 2017: NeuroImage
https://www.readbyqxmd.com/read/28486713/probing-the-behavioral-and-neurophysiological-effects-of-acute-smoking-abstinence-on-drug-and-nondrug-reinforcement-during-a-cognitive-task
#12
Nicolas J Schlienz, Larry W Hawk
Introduction: Smoking abstinence is theorized to increase smoking reinforcement and decrease nondrug reinforcement. A separate literature demonstrates the detrimental effects of abstinence on cognition. The present study integrates these two areas by examining the separate and combined effects of reinforcement and smoking abstinence on behavior and a neurophysiological index of response monitoring (ie, error-related negativity [ERN]) during a cognitive task. Methods: After a screening visit, adult smokers attended two laboratory visits, once while smoking and once while abstinent...
June 1, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28485076/response-inhibition-and-interference-control-effects-of-schizophrenia-genetic-risk-and-schizotypy
#13
Ulrich Ettinger, Désirée S Aichert, Nicola Wöstmann, Sandra Dehning, Michael Riedel, Veena Kumari
The ability to inhibit inappropriate responses and suppress irrelevant information is a core feature of executive control. In this study, we provide a detailed analysis of prepotent response inhibition and interference in patients with schizophrenia. To further test the role of genetic factors and subclinical schizophrenia-like traits, we additionally studied clinically unaffected, first-degree relatives of schizophrenia patients and assessed dimensions of schizotypy in both relatives and healthy controls. Inhibition and interference control were assessed using a battery comprising the antisaccade, Stroop, stop signal, go/no-go, flanker, and Simon tasks...
May 8, 2017: Journal of Neuropsychology
https://www.readbyqxmd.com/read/28484403/cognitive-advantages-of-bilingual-children-in-different-sociolinguistic-contexts
#14
Elma Blom, Tessel Boerma, Evelyn Bosma, Leonie Cornips, Emma Everaert
Many studies have shown that bilingual children outperform monolinguals on tasks testing executive functioning, but other studies have not revealed any effect of bilingualism. In this study we compared three groups of bilingual children in the Netherlands, aged 6-7 years, with a monolingual control group. We were specifically interested in testing whether the bilingual cognitive advantage is modulated by the sociolinguistic context of language use. All three bilingual groups were exposed to a minority language besides the nation's dominant language (Dutch)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28480961/comparison-of-the-acute-effects-of-high-intensity-interval-training-and-continuous-aerobic-walking-on-inhibitory-control
#15
Shih-Chun Kao, Daniel R Westfall, Jack Soneson, Brendon Gurd, Charles H Hillman
The purpose of this study was to investigate the effects of a single bout of high-intensity interval training (HIIT) and continuous aerobic exercise (CAE) on inhibitory control. The P3 component of the stimulus-locked ERP was collected in 64 young adults during a modified flanker task following 20 min of seated rest, 20 min of CAE, and 9 min of HIIT on separate days in counterbalanced order. Participants exhibited shorter overall reaction time following CAE and HIIT compared to seated rest. Response accuracy improved following HIIT in the task condition requiring greater inhibitory control compared to seated rest and CAE...
May 8, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28477312/visual-selective-attention-with-virtual-barriers
#16
Darryl W Schneider
Previous studies have shown that interference effects in the flanker task are reduced when physical barriers (e.g., hands) are placed around rather than below a target flanked by distractors. One explanation of this finding is the referential coding hypothesis, whereby the barriers serve as reference objects for allocating attention. In five experiments, the generality of the referential coding hypothesis was tested by investigating whether interference effects are modulated by the placement of virtual barriers (e...
May 5, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28471731/efficacy-and-safety-of-ashwagandha-withania-somnifera-l-dunal-root-extract-in-improving-memory-and-cognitive-functions
#17
Dnyanraj Choudhary, Sauvik Bhattacharyya, Sekhar Bose
OBJECTIVES: Cognitive decline is often associated with the aging process. Ashwagandha (Withania somnifera (L.) Dunal) has long been used in the traditional Ayurvedic system of medicine to enhance memory and improve cognition. AIM: This pilot study was designed to evaluate the efficacy and safety of ashwagandha (Withania somnifera (L.) Dunal) in improving memory and cognitive functioning in adults with mild cognitive impairment (MCI). METHODS: A prospective, randomized, double-blind, placebo-controlled study was conducted in 50 adults...
November 2, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28450974/response-preparation-response-conflict-and-the-effects-of-irrelevant-flanker-stimuli
#18
Peter Wühr, Herbert Heuer
The present study explored how response preparation modulates the effects of response conflict as induced by irrelevant flanker stimuli. In Experiments 1 and 2, an unreliable response cue (i.e., valid in 75% of trials but invalid in 25% of trials) preceded the stimulus display containing a target stimulus and different types (i.e., identical, neutral, compatible, or incompatible) flanker stimuli. In Experiment 3, a fully reliable response cue (i.e., valid in 100% of trials) or a neutral cue preceded the stimulus display...
2017: Advances in Cognitive Psychology
https://www.readbyqxmd.com/read/28437128/neural-dynamics-of-grouping-and-segmentation-explain-properties-of-visual-crowding
#19
Gregory Francis, Mauro Manassi, Michael H Herzog
Investigations of visual crowding, where a target is difficult to identify because of flanking elements, has largely used a theoretical perspective based on local interactions where flanking elements pool with or substitute for properties of the target. This successful theoretical approach has motivated a wide variety of empirical investigations to identify mechanisms that cause crowding, and it has suggested practical applications to mitigate crowding effects. However, this theoretical approach has been unable to account for a parallel set of findings that crowding is influenced by long-range perceptual grouping effects...
April 24, 2017: Psychological Review
https://www.readbyqxmd.com/read/28436757/bilingualism-and-age-are-continuous-variables-that-influence-executive-function
#20
Sara Incera, Conor T McLennan
We analyzed the effects of bilingualism and age on executive function. We examined these variables along a continuum, as opposed to dichotomizing them. We investigated the impact that bilingualism and age have on two measures of executive control (Stroop and Flanker). The mouse-tracking paradigm allowed us to examine the continuous dynamics of the responses as participants completed each trial. First, we found that the Stroop effect was reduced with younger age and higher levels of bilingualism; however, no Bilingualism by Age interaction emerged...
April 24, 2017: Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition
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