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https://www.readbyqxmd.com/read/28726177/the-reliability-paradox-why-robust-cognitive-tasks-do-not-produce-reliable-individual-differences
#1
Craig Hedge, Georgina Powell, Petroc Sumner
Individual differences in cognitive paradigms are increasingly employed to relate cognition to brain structure, chemistry, and function. However, such efforts are often unfruitful, even with the most well established tasks. Here we offer an explanation for failures in the application of robust cognitive paradigms to the study of individual differences. Experimental effects become well established - and thus those tasks become popular - when between-subject variability is low. However, low between-subject variability causes low reliability for individual differences, destroying replicable correlations with other factors and potentially undermining published conclusions drawn from correlational relationships...
July 19, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28711672/the-flexible-engagement-of-monitoring-processes-in-non-focal-and-focal-prospective-memory-tasks-with-salient-cues
#2
Carmen Hefer, Anna-Lisa Cohen, Alexander Jaudas, Gesine Dreisbach
Prospective memory (PM) refers to the ability to remember to perform a delayed intention. Here, we aimed to investigate the ability to suspend such an intention and thus to confirm previous findings (Cohen, Gordon, Jaudas, Hefer, & Dreisbach, 2016) demonstrating the ability to flexibly engage in monitoring processes. In the current study, we presented a perceptually salient PM cue (bold and red) to rule out that previous findings were limited to non-salient and, thus, easy to ignore PM cues. Moreover, we used both a non-focal (Experiment 1) and a focal PM (Experiment 2) cue...
July 13, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28676780/prolonged-interruption-of-cognitive-control-of-conflict-processing-over-human-faces-by-task-irrelevant-emotion-expression
#3
Jinyoung Kim, Min-Suk Kang, Yang Seok Cho, Sang-Hun Lee
As documented by Darwin 150 years ago, emotion expressed in human faces readily draws our attention and promotes sympathetic emotional reactions. How do such reactions to the expression of emotion affect our goal-directed actions? Despite the substantial advance made in the neural mechanisms of both cognitive control and emotional processing, it is not yet known well how these two systems interact. Here, we studied how emotion expressed in human faces influences cognitive control of conflict processing, spatial selective attention and inhibitory control in particular, using the Eriksen flanker paradigm...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28659750/development-of-performance-and-erps-in-a-flanker-task-in-children-and-adolescents-with-tourette-syndrome-a-follow-up-study
#4
Heike Eichele, Tom Eichele, Lynn Marquardt, Steinunn Adolfsdottir, Kenneth Hugdahl, Lin Sørensen, Kerstin J Plessen
Background: Tourette Syndrome (TS) is a neurodevelopmental disorder with childhood-onset, with a typical decline in tic severity, as well as an increasing ability to suppress tics in late childhood and adolescence. These processes develop in parallel with general improvement of self-regulatory abilities, and performance monitoring during this age-span. Hence, changes in performance monitoring over time might provide insight into the regulation of tics in children and adolescents with TS. Method: We measured reaction time, reaction time variability, accuracy, and event-related potentials (ERP) in 17 children with TS, including 10 children with comorbid Attention-Deficit/Hyperactivity Disorder (ADHD), 24 children with ADHD, and 29 typically developing children, using a modified Eriksen Flanker task in two testing sessions administered on average 4...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28608004/effector-system-specific-sequential-modulations-of-congruency-effects
#5
Markus Janczyk, Hartmut Leuthold
Congruency effects in conflict tasks are reliably reduced after experiencing conflict, that is, following incongruent trials. Such sequential modulations (sometimes referred to as the Gratton effect) indicate the operation of conflict adaptation mechanisms. The influential conflict monitoring hypothesis suggested that after conflict the processing of relevant stimulus dimensions is increased. Alternatively, it was suggested that the influence of automatic response activation is suppressed following conflict...
June 12, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28551393/content-specificity-of-attentional-bias-to-threat-in-post-traumatic-stress-disorder
#6
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/28549279/control-adjustments-in-speaking-electrophysiology-of-the-gratton-effect-in-picture-naming
#7
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
#8
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/28501539/spatiotemporal-oscillatory-dynamics-of-visual-selective-attention-during-a-flanker-task
#9
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/28471731/efficacy-and-safety-of-ashwagandha-withania-somnifera-l-dunal-root-extract-in-improving-memory-and-cognitive-functions
#10
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/28432077/aerobic-exercise-promotes-executive-functions-and-impacts-functional-neural-activity-among-older-adults-with-vascular-cognitive-impairment
#11
Chun Liang Hsu, John R Best, Jennifer C Davis, Lindsay S Nagamatsu, Shirley Wang, Lara A Boyd, Gy Robin Hsiung, Michelle W Voss, Janice Jennifer Eng, Teresa Liu-Ambrose
BACKGROUND: Vascular cognitive impairment (VCI) results from cerebrovascular disease, and worldwide, it is the second most common type of cognitive dysfunction. While targeted aerobic training is a promising approach to delay the progression of VCI by reducing cardiometabolic risk factors, few randomised controlled trials to date have specifically assessed the efficacy of aerobic training on cognitive and brain outcomes in this group at risk for functional decline. AIM: To examine the effect of moderate-intensity aerobic training on executive functions and functional neural activity among older adults with mild subcortical ischaemic VCI (SIVCI)...
April 21, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28410524/cognitive-control-in-young-heavy-drinkers-an-erp-study
#12
Ingmar H A Franken, Maartje Luijten, Frederik M van der Veen, Jan W van Strien
Substance use disorders have been frequently linked to an impaired cognitive control system. Whether this impaired control is also present in young adults who heavily drink alcohol is still subject to debate. The present study investigated possible impairments in cognitive control in heavy drinkers using behavioral and electrophysiological (EEG) measures. We studied behavioral performance on an inhibitory control and an error-processing task, using a GoNogo task and an Eriksen Flanker task respectively, while ERPs (Nogo-N2/P3 and ERN/Pe) were measured in a group of heavy alcohol drinkers (n=48) and a healthy control group of light drinkers (n=49)...
June 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28165364/inhibitory-control-under-threat-the-role-of-spontaneous-eye-blinks-in-post-traumatic-stress-disorder
#13
Mikael Rubin, Denise A Hien, Dipanjana Das, Robert D Melara
This study is the first to explore spontaneous eye blink rate (sEBR) in individuals with post-traumatic stress disorder (PTSD). We investigated the connection between the magnitude of flanker interference in PTSD participants and sEBR during performance on a modified version of the Eriksen flanker task. As a peripheral measure of cognitive control and dopaminergic function, sEBR may illuminate the relationship between PTSD and executive function. Findings revealed a positive relationship between sEBR and flanker interference in participants diagnosed with PTSD, to both threat-related and neutral stimuli, whereas this relationship was negative in participants exposed to trauma but without PTSD and in healthy controls...
February 4, 2017: Brain Sciences
https://www.readbyqxmd.com/read/27941977/conflict-adaptation-and-cue-competition-during-learning-in-an-eriksen-flanker-task
#14
Rodica Ghinescu, Todd R Schachtman, Ashley K Ramsey, Gabriele Gratton, Monica Fabiani
Two experiments investigated competition between cues that predicted the correct target response to a target stimulus in a response conflict procedure using a flanker task. Subjects received trials with five-character arrays with a central target character and distractor flanker characters that matched (compatible) or did not match (incompatible) the central target. Subjects' expectancies for compatible and incompatible trials were manipulated by presenting pre-trial cues that signaled the occurrence of compatible or incompatible trials...
2016: PloS One
https://www.readbyqxmd.com/read/27835807/acute-stress-impairs-frontocingulate-activation-during-error-monitoring-in-remitted-depression
#15
Alexis E Whitton, Ashlee Van't Veer, Pragya Kakani, Daniel G Dillon, Manon L Ironside, Anja Haile, David J Crowley, Diego A Pizzagalli
Deficits in cognitive control are a hallmark characteristic of depression, however less is known about the degree to which they persist beyond symptom remission and might contribute to symptom recurrence in remitted individuals (rMDD). Evidence indicates that stress interferes with cognitive control, highlighting a potential mechanism by which stress precipitates depression relapse. Therefore, this study examined whether stress exposure elicits deficits in error monitoring - a component of cognitive control thought to be particularly implicated in the ability to adaptively respond to negative feedback - in individuals with rMDD...
January 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27832732/learned-irrelevance-and-cue-competition-using-an-eriksen-flanker-task
#16
Melissa Tapia, Kirkwood Meyers, Rachel Richardson, Rodica Ghinescu, Todd R Schachtman
Many studies have examined competition between cues for learning. Research examining cue competition has used cues that predict the occurrence of an outcome, or, in some rare cases, competition between cues that predict the absence of an outcome (predicting that an outcome explicitly will not occur). Alternatively, learned irrelevance occurs when a cue lacks the ability to predict the occurrence or absence of an outcome. Using an Eriksen flanker task, the present study evaluated competition among cues that do not have predictive value, that is, competition for learning that an outcome is unpredictable...
September 2016: Experimental Psychology
https://www.readbyqxmd.com/read/27427535/food-addiction-is-associated-with-impaired-performance-monitoring
#17
Ingmar H A Franken, Ilse M T Nijs, Ashley Toes, Frederik M van der Veen
Currently, there is an ongoing debate about whether it is possible to be addicted to food. There are several indications pointing in this direction, but research is scarce. Up to this date it is not exactly known whether this "food addiction" shares common neurocognitive deficits observed in the more classical types of addictions such as substance use disorders (SUDs). One commonly observed finding in SUD patients is that there is an impaired cognitive control. One of the essential components of cognitive control is performance monitoring...
July 15, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27338588/when-congruence-breeds-preference-the-influence-of-selective-attention-processes-on-evaluative-conditioning
#18
Katarina Blask, Eva Walther, Christian Frings
We investigated in two experiments whether selective attention processes modulate evaluative conditioning (EC). Based on the fact that the typical stimuli in an EC paradigm involve an affect-laden unconditioned stimulus (US) and a neutral conditioned stimulus (CS), we started from the assumption that learning might depend in part upon selective attention to the US. Attention to the US was manipulated by including a variant of the Eriksen flanker task in the EC paradigm. Similarly to the original Flanker paradigm, we implemented a target-distracter logic by introducing the CS as the task-relevant stimulus (i...
June 24, 2016: Cognition & Emotion
https://www.readbyqxmd.com/read/27330977/neurophysiological-evidence-of-impaired-self-monitoring-in-schizotypal-personality-disorder-and-its-reversal-by-dopaminergic-antagonism
#19
Mireia Rabella, Eva Grasa, Iluminada Corripio, Sergio Romero, Miquel Àngel Mañanas, Rosa M Antonijoan, Thomas F Münte, Víctor Pérez, Jordi Riba
BACKGROUND: Schizotypal personality disorder (SPD) is a schizophrenia-spectrum disorder characterized by odd or bizarre behavior, strange speech, magical thinking, unusual perceptual experiences, and social anhedonia. Schizophrenia proper has been associated with anomalies in dopaminergic neurotransmission and deficits in neurophysiological markers of self-monitoring, such as low amplitude in cognitive event-related brain potentials (ERPs) like the error-related negativity (ERN), and the error positivity (Pe)...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27315275/linking-theoretical-decision-making-mechanisms-in-the-simon-task-with-electrophysiological-data-a-model-based-neuroscience-study-in-humans
#20
Mathieu Servant, Corey White, Anna Montagnini, Borís Burle
A current challenge for decision-making research is in extending models of simple decisions to more complex and ecological choice situations. Conflict tasks (e.g., Simon, Stroop, Eriksen flanker) have been the focus of much interest, because they provide a decision-making context representative of everyday life experiences. Modeling efforts have led to an elaborated drift diffusion model for conflict tasks (DMC), which implements a superimposition of automatic and controlled decision activations. The DMC has proven to capture the diversity of behavioral conflict effects across various task contexts...
October 2016: Journal of Cognitive Neuroscience
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