Low-conflict Conditions Research Articles

ADHD and Interfering Thoughts in High and Low Conflict Conditions

Background: Individuals with an ADHD diagnosis have increased levels of interfering thoughts, especially in the form of mind wandering. This was mostly investigated in sustained attention tasks; hence it is unclear whether the findings are only due to their difficulties in those types of tasks. Moreover, it is unclear how the amount of control invested in the task will affect those differences between control and ADHD groups. Method: ADHD and matched control groups performed the Stroop task under high and low conflict conditions while measuring their interfering thoughts level. Results: Individuals with ADHD have more interfering thoughts compared to a control group even when they are able to change their control level according to the task conflict. Conclusion: Interfering thoughts are an independent predictor of ADHD impairments, observed regardless of the degree of control invested in the task.

What Explains Collaboration in High and Low Conflict Contexts? Comparing Climate Change Policy Networks in Four Countries

Explaining collaboration between actors involved in policy processes is crucial for understanding these processes and their outcomes. The policy science literature has advanced several hypotheses explicating what enables or hinders collaboration. However, only a handful of studies compare these factors across different policy contexts. This paper investigates the role of beliefs and influence in shaping collaboration under conditions of high and low conflict by estimating Exponential Random Graph Models using network survey data on the climate policy domains in four countries. Results show that both beliefs and influence are associated with the formation of collaboration ties in the high conflict contexts of South Korea and the United States, whereas neither are significant in the low conflict contexts of Sweden and Switzerland. By considering the level of conflict, our findings provide a more nuanced understanding of when beliefs and influence shape collaboration patterns.

PB8. Methylphenidate modulates gain modulation processes during competitive auditory attention in a dose–response fashion

The ability to selectively perceive and flexibly attend to relevant sensory signals in the environment is essential for adaptive behavior in everyday life. The fronto-striatal gain control mechanisms likely serve as an important regulatory interface of selective attention and perception. These gain control mechanisms are likely to be modulated by the dopaminergic system. In the current study, we administered methylphenidate (MPH) in two different dosages (0.25 mg/kg and 0.5 mg/kg) to healthy young adults in a single-blinded placebo-controlled study to examine the role of dopamine in regulating the gain control mechanisms. This was combined with high-density EEG recordings and source localization analyses in a dichotic listening task in which perceptual saliency was manipulated besides attentional focus resulting in conditions of low and high perceptual-attentional conflict. Compared to a placebo condition, we show that only at low MPH dosages (0.25 mg) performance was differentially modulated. No effects were observed using 0.50 mg MPH. The administration of 0.25 mg MPH reduced the effects of high perceptual-attentional conflict between discordant dichotic syllables. Interestingly, this was only the case for the right ear, which usually shows an advantage in verbal processing. This was reflected by specific EEG-correlates reflecting bottom-up attentional gating and top-down conflict monitoring processes. The results suggest that MPH modulates gain control processes during competitive auditory attention in a dose-dependent fashion. Yet, this modulatory effect depends on functional cerebral asymmetries.

P112. Modulatory effects of anodal transcranial direct current stimulation on fronto-striatal gain control of the interplay between selective attention and perception

Carrying conversations in public spaces with a plethora of competing sensory inputs demands flexible interactions between attention and perception for selectively processing goal-relevant information. We postulate that the fronto-striatal network plays a key role in regulating this interaction. However, to date the underlying gain control mechanisms are not yet well understood. Neuronal gain control can be fine-tuned by membrane potential regulated changes in neuronal excitability. Anodal transcranial current stimulation (atDCS) has been shown to cause a depolarization of resting membrane potentials, which increases neuronal excitability. In the present study, we applied off-line atDCS over the right inferior frontal gyrus (IFG) in healthy young adults in a single-blinded sham-controlled study to investigate atDCS-induced effects on fronto-striatal gain control of auditory attention. We recorded high-density EEG recordings during a dichotic listening task in which both perceptual saliency and attentional focus were varied, creating conditions of low and high perceptual-attentional conflict. Compared to sham stimulation, pilot results suggest that atDCS enhanced auditory perception and attentional regulation: Specifically, atDCS increased discrimination ability of inter-aural intensity differences and enhanced performance in high conflict conditions. These behavioral effects were reflected by EEG correlates associated with attentional and perceptual processing.

Modulation of amygdala response to task-irrelevant emotion.

It has been shown that as cognitive demands of a non-emotional task increase, amygdala response to task-irrelevant emotional stimuli is reduced. However, it remains unclear whether effects are due to altered task demands, or altered perceptual input associated with task demands. Here, we present fMRI data from 20 adult males during a novel cognitive conflict task in which the requirement to scan emotional information was necessary for task performance and held constant across levels of cognitive conflict. Response to fearful facial expressions was attenuated under high (vs low) conflict conditions, as indexed by both slower reaction times and reduced right amygdala response. Psychophysiological interaction analysis showed that increased amygdala response to fear in the low conflict condition was accompanied by increased functional coupling with middle frontal gyrus, a prefrontal region previously associated with emotion regulation during cognitive task performance. These data suggest that amygdala response to emotion is modulated as a function of task demands, even when perceptual inputs are closely matched across load conditions. PPI data also show that, in particular emotional contexts, increased functional coupling of amygdala with prefrontal cortex can paradoxically occur when executive demands are lower.

Memory and language improvements following cognitive control training.

Cognitive control refers to adjusting thoughts and actions when confronted with conflict during information processing. We tested whether this ability is causally linked to performance on certain language and memory tasks by using cognitive control training to systematically modulate people's ability to resolve information-conflict across domains. Different groups of subjects trained on 1 of 3 minimally different versions of an n-back task: n-back-with-lures (High-Conflict), n-back-without-lures (Low-Conflict), or 3-back-without-lures (3-Back). Subjects completed a battery of recognition memory and language processing tasks that comprised both high- and low-conflict conditions before and after training. We compared the transfer profiles of (a) the High- versus Low-Conflict groups to test how conflict resolution training contributes to transfer effects, and (b) the 3-Back versus Low-Conflict groups to test for differences not involving cognitive control. High-Conflict training-but not Low-Conflict training-produced discernable benefits on several untrained transfer tasks, but only under selective conditions requiring cognitive control. This suggests that the conflict-focused intervention influenced functioning on ostensibly different outcome measures across memory and language domains. 3-Back training resulted in occasional improvements on the outcome measures, but these were not selective for conditions involving conflict resolution. We conclude that domain-general cognitive control mechanisms are plastic, at least temporarily, and may play a causal role in linguistic and nonlinguistic performance. (PsycINFO Database Record

Lexical conflict resolution in children with specific language impairment

The aim of our study is to examine the effect of conflict on naming latencies in children with specific language impairment (SLI) and typically developing (TD) children and to explore whether deficits in conflict resolution contribute to lexical problems in SLI. In light of previous results showing difficulties with inhibitory functions in SLI, we expected higher semantic conflict effect in the SLI than in the TD group. To investigate this question 13 children with SLI and 13 age- and gender-matched TD children performed a picture naming task in which the level of conflict was manipulated and naming latencies were measured. Children took longer to name pictures in high conflict conditions than in low conflict conditions. This effect was equally present in the SLI and TD groups. Our results suggest that word production is more effortful for children when conflict resolution is required but children with SLI manage competing lexical representations as efficiently as TD children. This result contradicts studies, which found difficulties with inhibitory functions and is in line with findings of intact inhibitory abilities in children with SLI. Further studies should rule out the possibility that in SLI lower level of conflict resulting from weaker lexical representations masks impairments in inhibition, and investigate the effect of linguistic conflict in other areas.

The Challenges of Israeli Adolescent Girls: Gender Differences in Observed Autonomy and Relatedness in Adolescent-Mother Interactions

This study examined gender differences in autonomy and relatedness in adolescent-mother interactions, to evaluate two competing notions. The first, based on social role theory, suggested that girls and their mothers would show lower autonomy and higher relatedness than boys and their mothers. The second, stemming from the psychodynamic perspective, suggested that girls would show higher autonomy than boys, and that girls and their mothers would show lower relatedness than boys and their mothers. Participants were 122 Jewish Israeli mothers and their 16.5 years old adolescents (58.19 % girls) from middle class families residing in northern and central cities in Israel. Dyads were observed during a family disagreement (i.e., a high-conflict condition) and while planning a vacation (i.e., a low-conflict condition). Autonomy and relatedness of each participant in each task were coded using the Individuality and Connectedness Q-sort (Bengston & Grotevant 1999). Our findings indicated that girls displayed higher autonomy than boys across the two conflict conditions. In addition, girls and their mothers showed lower relatedness than boys and their mothers, but only under the high-conflict condition. These results are in line with the notions offered by the psychodynamic perspective. They reveal the unique challenges which Jewish Israeli girls and their mothers may face with respect to autonomy and relatedness, and highlight the importance of assessing autonomy and relatedness under varied conflict conditions.

Loss Frequency Versus Long-Term Outcome in Preschoolers' Decision Making on a Child Variant of the Iowa Gambling Task

The current study explored the effect of loss frequency and long-term expected outcome on decision making in 86 preschoolers. Children were randomly assigned to 2 versions of a child-friendly Iowa Gambling Task. In the high-conflict condition, the deck with the highest long-term outcome also had the highest frequency of loss, whereas the deck with the lowest long-term outcome had the lowest frequency of loss, setting up a conflict between preference for lower frequency of loss and preference for a higher long-term outcome. In the low-conflict condition, the highest long-term outcome deck had the lowest frequency of loss and the lowest long-term outcome deck had the highest frequency of loss. Results suggested age and sex differences in decision making. Specifically, the results suggested that preschoolers are able to make advantageous decisions when choices do not conflict in terms of loss frequency and long-term outcome. Finally, the results suggest that girls tend to focus more on loss frequency than boys when making choices. The findings have implications for assessment of decision making and hot executive functions in young children.

Caregiving load and pediatric asthma morbidity: Conflict matters.

Asthma is one of the most prevalent chronic illnesses among children in the United States and it disproportionately affects members of minority groups living in low-income and urban environments. In these environments, illness-related stressors are often experienced alongside a variety of family and social stressors, and parents may carry significant additional caregiving responsibilities over and above their child's asthma management. Participants in the current study included 23 girls and 22 boys, all diagnosed with asthma and living in low-income, urban neighborhoods; 85% of participants were members of ethnic minority groups. This study utilized a family systems framework to examine links among parents' caregiving responsibilities, parent-child conflict, and asthma morbidity. Caregiving load refers to the number of children and adults for whom the parent endorsed caregiving responsibilities. Two indicators of asthma morbidity were assessed, including asthma-related restrictions in the family's activities and the child's asthma quality of life. The findings of this study suggested a pivotal role of parent-child conflict in predicting children's and families' asthma-related morbidity. Higher levels of parent-child conflict were directly associated with higher levels of family activity restriction. Interestingly, under conditions of high parent-child conflict, higher caregiving load was associated with lower pediatric quality of life, but under conditions of low parent-child conflict, higher caregiving load was associated with higher quality of life. Implications of these findings for asthma treatment programs are discussed.

Classic Stroop Negative Priming Effects for Children and Adults Diverge With Less-Conflicting and Nonconflicting Conditions

Negative priming indexes an inhibition process that aids target selection by reducing distractor interference. To date, children have produced negative priming only in tasks where distractor response tendencies are consistently greater than or equal to targets and not in tasks containing a substantial proportion of low-conflict distractors. To establish the exact parameters under which children's negative priming attenuates relative to adults, we varied processing demands across 2 experiments involving children and adults. Negative priming was comparable when 100% high-conflict conditions were encountered (Experiment 1) and was intact in adults but not children when a ratio of 50:50 high- to low-conflict conditions was encountered (Experiment 2). Compared with adults, children seem induced to divide attention more generally when low-conflict attentional conditions are included, attenuating negative priming.

Electrophysiological correlates of decision‐making in high‐risk versus low‐risk conditions of a gambling game

The majority of studies investigating risky decision making focus on the high-conflict condition, and very few consider the low-conflict condition in which there is either a very high or a very low probability of risk. Even though the high-risk condition and low-risk condition are both considered low-conflict decision scenarios and both behavioral outcomes are highly predictable, these conditions still differ in terms of the probabilities of reward and punishment. In the following study, we investigated both behavioral and electrophysiological correlates associated with high- and low-risk conditions within the low-conflict scenario, as well as high-conflict condition, in a modified gambling game. The behavioral results showed that, within the low-conflict scenario, the participants took more time to make the decision in the high-risk condition compared to the low-risk condition. The event-related potentials (ERP) data showed that, during the decision making, the high-risk condition evoked a more negative ERP deflection than did the low-risk condition in the time window of 300-500 ms (N400), which had a frontocentral focus of scalp distribution. The results suggested that the high-risk condition was associated with a higher conflict between the participants' "motivationally based" tendency to want to receive cards and the task instructions, which stated that the face value of the first two cards will strongly predict a low probability of success. It was further speculated that the N400 in the present study might be associated with anticipation of negative rewards, which was functionally equivalent to the FRN (feedback-related negativity) to negative outcomes.

Modulation of the error‐related negativity by response conflict

An arrow version of the Eriksen flanker task was employed to investigate the influence of conflict on the error-related negativity (ERN). The degree of conflict was modulated by varying the distance between flankers and the target arrow (CLOSE and FAR conditions). Error rates and reaction time data from a behavioral experiment were used to adapt a connectionist model of this task. This model was based on the conflict monitoring theory and simulated behavioral and event-related potential data. The computational model predicted an increased ERN amplitude in FAR incompatible (the low-conflict condition) compared to CLOSE incompatible errors (the high-conflict condition). A subsequent ERP experiment confirmed the model predictions. The computational model explains this finding with larger post-response conflict in far trials. In addition, data and model predictions of the N2 and the LRP support the conflict interpretation of the ERN.

TPH2 gene variation and conflict processing in a cognitive and an emotional Stroop task

Evidence suggests that a promoter polymorphism of the tryptophan-hydroxylase 2 gene (TPH2 −703 G/T) is associated with executive control functions. The current study aimed to clarify whether this relation is restricted to a purely cognitive domain or whether such an effect can also be observed in the processing of emotional material. In a sample of 89 student subjects, a ‘cognitive’ and an ‘emotional’ Stroop paradigm were applied to measure processing of cognitive and affective conflicts. Our results suggest an impact of the TPH2 −703 G/T polymorphism on executive control in both, the cognitive as well as the emotional task. In detail, homozygous carriers of the T allele showed decelerated responses in low-conflict conditions, pointing to a rather abnormal functioning of higher-order control mechanisms. Thus, the present investigation is consistent with previous behavioural studies and adds further evidence for the impact of serotonin at the interface of cognition and emotion.

The neural basis of risky decision-making in a blackjack task

To investigate the neural substrates of risky decision making in gambling tasks, we recorded event-related potentials while participants engaged in a modified blackjack game. We focused on the high-conflict condition (probability of losing approximately 50%) and low-conflict condition (probability of losing approximately 20%). We were also interested in the difference between risky and conservative responses under high-conflict conditions. In the 220-320 and 500-600 ms time windows, high-conflict conditions elicited more negative event-related potential deflections than low-conflict conditions. In the latter time window, risky conditions elicited more negative event-related potential deflections than conservative conditions. The N2 (220-320 ms) and N500 (500-600 ms) provide evidence for the dissociation of neural circuits between perceptual and response conflicts.

Functional and Biochemical Alterations of the Medial Frontal Cortex in Obsessive-Compulsive Disorder

The medial frontal cortex (MFC), including the dorsal anterior cingulate and the supplementary motor area, is critical for adaptive and inhibitory control of behavior. Abnormally high MFC activity has been a consistent finding in functional neuroimaging studies of obsessive-compulsive disorder (OCD). However, the precise regions and the neural alterations associated with this abnormality remain unclear. To examine the functional and biochemical properties of the MFC in patients with OCD. Cross-sectional study combining volume-localized proton magnetic resonance spectroscopy and functional magnetic resonance imaging with a task encompassing inhibitory control processes (the Multi-Source Interference Task) designed to activate the MFC. Healthy control participants and OCD patients recruited from the general community. Nineteen OCD patients (10 males and 9 females) and 19 age-, sex-, education-, and intelligence-matched control participants recruited from the general community. Psychometric measures of symptom severity, Multi-Source Interference Task behavioral performance, blood oxygen level-dependent activation, and proton magnetic resonance spectroscopy brain metabolite concentrations. Multi-Source Interference Task behavioral performance did not differ between OCD patients and control subjects. Reaction time interference and response errors were correlated with blood oxygen level-dependent activation in the dorsal anterior cingulate region in both groups. Compared with controls, OCD patients had greater relative activation of the supplementary motor area and deactivation of the rostral anterior cingulate during high- vs low-conflict (incongruent > congruent) trials. Patients with OCD also showed reduced levels of neuronal N-acetylaspartate in the dorsal anterior cingulate region, which was negatively correlated with their blood oxygen level-dependent activation of the region. Hyperactivation of the MFC during high- vs low-conflict conditions in patients with OCD may be a compensatory response to a neuronal abnormality in the region. This relationship may partly explain the nature of inhibitory control deficits that are frequently seen in this group and may serve as a focus of future treatment studies.

Target spatial frequency determines the response to conflicting defocus- and convergence-driven accommodative stimuli

Asthenopia, or visual fatigue, is a frequent complaint from observers of stereoscopic three-dimensional displays. It has been proposed that asthenopia is a consequence of anomalous oculomotor responses generated by conflict between accommodative and convergence stimuli. The hypothesis was examined by measuring accommodation and convergence continuously with a Shin-Nippon SRW5000 infrared autorefractor and a limbus tracking device. Subjects viewed a high contrast Maltese Cross target at three levels of Gaussian filter target blur under conditions of relatively low- and high-conflict between accommodation and convergence stimuli, the latter inducing the sensation of stereopsis. Under the low-conflict conditions accommodation was stable, but convergence-driven accommodation was dominant when the target was extremely blurred. Under the high-conflict conditions the role of convergence-driven accommodation increased systematically with the degree of target blur. It is proposed that defocus-driven accommodation becomes weak when the target comprises low spatial frequency components. Large accommodative overshoots to step stimuli that are not blurred or only mildly blurred were consistently observed and are attributed to the initial accommodative response being convergence-driven. Whereas the possibility that high-conflict conditions are a cause of asthenopia has been previously reported, this is the first evidence that they specifically affect accommodative responses while viewing stereoscopic displays.

The effects of accountability on bias in physician decision making: Going from bad to worse

Members of the Iowa Academy of Family Physicians participated in a survey study in which they were asked to make hypothetical decisions in either high- or low-conflict treatment conditions. In the low-conflict treatment condition the options were a common medication with a referral or a referral only. In the high-conflict treatment condition the same two options were given plus another attractive medication. In addition, we manipulated accountability by asking half of the participants to provide a written defense of their treatment options, which they would then agree to discuss at a later time. The results showed that physicians in the high-conflict condition chose the referral-only option significantly more than the physicians in the low-conflict condition, thus violating the normative rule of regularity. Moreover, that pattern was significantly amplified for physicians who were held accountable for their treatment decisions. These findings replicate and extend previous research and are discussed within the framework of reason-based choice.

Artifactual fMRI group and condition differences driven by performance confounds

Analysis techniques comparing groups or conditions that vary in performance are open to a possible confound driven by those performance differences, if these errors are ignored. Disproportionate numbers of errors may either introduce noise into the signal of interest or confound the signal of interest with additional signal associated with specific error-related processes. Two inhibitory task datasets were reanalysed, one comparing young and elderly groups, the other comparing high and low conflict conditions within the same group of subjects. The data were analysed twice using event-related techniques, one treating correct and error responses separately, the other treating error responses as if they were correct. It was found that the activation maps differed considerably, with the inclusion of errors leading to many false positive and false negative activation clusters. Using performance as a covariate, analyses of covariance (ANCOVA) were used to try to correct these differences without success. Data simulations that varied the number of errors included in the analyses found that surprisingly few errors could significantly alter activation maps. Consequently, brain-imaging investigations that do not accommodate error contributions to functional signals are at risk of misinterpreting activation patterns.

Event-related potential N270, a negative component to identification of conflicting information following memory retrieval.

N270, an endogenous ERP component of conflict effect, was evoked in previous studies with S1-S2 paradigm. The present experiment is designed to confirm the speculation that this conflict-related negativity could also be elicited by stimulus probes having conflict with a memorized item in a visual post-retrieval comparison task. A Sternberg probe-matching paradigm was modified in the present study. The stimuli consisted of a memory set of 3 different items (simple figures) and a retrieval set of 3 probe figures. Subjects matched each probe to its corresponding item in the memory set. The tasks were designed with different conflict loads of no-conflict, low-conflict and high-conflict in the probe retrieval test. Probes of no-conflict elicited a major positive going component, P300, with bilateral parietal distribution. Probes of low- and high-conflict evoked N270, while N430 was elicited only in high-conflict condition. N270 was more negative in high-conflict condition than in low-conflict condition. The N270 was right hemispheric prominent in the low-conflict task and remarkably distributed over the right prefrontal areas. On the other hand, both N270 and N430 were distributed bilaterally on the scalp in the high-conflict task. The present results demonstrate that the N270 is an index to the conflict identification, while the N430 of the high-conflict task reflects the processing for complex conflicts following probe retrieval. These negativities are related to the processing of conflicts.