The Paradoxical Effect of Repeated Body Checking on Subjective Uncertainty.

OBJECTIVE: Body checking is considered a behavioral expression of the core psychopathology of eating disorders (EDs), namely, overvaluation of body weight and shape. Compulsive checking is motivated by a desire to increase a sense of certainty regarding feared outcomes. Paradoxically, studies showed that repeated checking acts to reduce certainty, forming a vicious cycle. No previous study examined whether the same principle applies for body checking. This study filled this gap by examining the causal effect of repeated body checking on memory certainty regarding checked body parts. METHOD: In a laboratory-based study, 77 female participants without an ED checked the size and shape of six body parts. Their objective memory regarding which body part was last checked, and subjective certainty about this memory were assessed. Then, one group of participants continued to engage in repeated body checking, and another group repeatedly checked a neutral object. Finally, all participants completed the six body parts checking procedure again, and their objective memory and memory certainty were re-assessed. RESULTS: In both checking groups, objective memory regarding the last body part checked was unaffected by the type of checking performed. Importantly, certainty about memory dropped considerably only among those in the repeated body-checking group. DISCUSSION: The findings provide the first empirical evidence of a paradoxical effect demonstrating that repeated body checking reduces certainty about checked body parts. The study implies that repeated body checking reduces the quality of information obtained through checking and, as such, could potentially motivate further checking.

Control your emotions: evidence for a shared mechanism of cognitive and emotional control.

The current investigation examined the bidirectional effects of cognitive control and emotional control and the overlap between these two systems in regulating emotions. Based on recent neural and cognitive findings, we hypothesised that two control systems largely overlap as control recruited for one system (either emotional or cognitive) can be used by the other system. In two experiments, participants completed novel versions of either the Stroop task (Experiment 1) or the Flanker task (Experiment 2) in which the emotional and cognitive control systems were actively manipulated into either a high or low emotional-load condition (achieved by varying the proportions of negative-valence emotional cues) and a high and a low cognitive control condition (achieved through varying the proportion of conflict-laden trials). In both experiments, participants' performance was impaired when both emotional and cognitive control were low, but significantly and similarly improved when one of the two control mechanisms were activated - the emotional or the cognitive. In Experiment 2, performance was further improved when both systems were activated. Our results give further support for a more integrative notion of control in which the two systems (emotional and cognitive control) not only influence each other, but rather extensively overlap.

Negative emotional cues improve free recall of positive and neutral words in unmedicated patients with major depressive disorder.

Individuals with major depressive disorder (MDD) exhibit attentional biases toward negative, mood-congruent stimuli while filtering out positive and neutral stimuli, resulting in memory biases to negative content. While attentional and memory biases in MDD have been extensively studied, the underlying mechanisms of these biases remain unclear. The current study investigates a novel model proposing that exposure to negative emotional cues triggers a transient "attentional window" in individuals with MDD, leading to heightened and deeper cognitive processing of any subsequent information, irrespective of its content. Forty-two unmedicated patients with MDD and no comorbid disorder and 41 healthy controls, completed six blocks of the emotional memory task, in which they were asked to watch a short video (negative, neutral, or positive valence) followed by a memory test on a list of neutral or positive valance words. Results indicated that participants with MDD, but not healthy controls, had better recall performance after a negative video compared to after neutral or positive videos, and that this effect occurred for both neutral and positive word-lists. These findings provide evidence that participants with MDD engage in deeper information processing following exposure to negative emotional stimuli. Potential clinical implications are discussed.

The aversiveness of intrusiveness: Evidence from involuntary musical imagery.

OBJECTIVE: Intrusive thoughts are characterized by a sense of intrusiveness of foreign entry into cognition. While not always consisting of negative content, intrusive thoughts are almost solely investigated in that context. Involuntary Musical Imagery (INMI) offers a promising alternative, as it is a type of involuntary cognition that can be used to evaluate intrusiveness without negative content. METHODS: In Study 1, 200 participants completed self-report questionnaires to assess several aspects of intrusiveness: meta-awareness, control, repetitiveness, frequency, and subjective experience of INMI. In Study 2, 203 participants completed self-report questionnaires to explore the clinical characteristics (depression, stress, anxiety, and rumination) which might mediate the connection between INMI frequency and INMI negative experience. RESULTS: Study 1 revealed, through exploratory factor analysis, that intrusiveness shares variance with the negative experience of INMI but not with INMI frequency. In Study 2, ruminative thinking was found to mediate the relationship between frequent INMI and the negative experience of INMI. CONCLUSION: These results suggest that INMI might be used to investigate intrusiveness in the lab without the potential confound of negative emotions. In addition, the results suggest that neither the content nor the frequency of intrusive thoughts can solely explain why these thoughts are aversive to some but not others. Ruminative style might be the missing link to explain how and why these intrusive thoughts become aversive and obsessive. In other words, we suggest that the cause for intrusiveness lies not in the thought or repetitiveness, but in the thinker.

Reliable affordances: A generative modeling approach for test-retest reliability of the affordances task.

The affordances task serves as an important tool for the assessment of cognition and visuomotor functioning, and yet its test-retest reliability has not been established. In the affordances task, participants attend to a goal-directed task (e.g., classifying manipulable objects such as cups and pots) while suppressing their stimulus-driven, irrelevant reactions afforded by these objects (e.g., grasping their handles). This results in cognitive conflicts manifesting at the task level and the response level. In the current study, we assessed the reliability of the affordances task for the first time. While doing so, we referred to the "reliability paradox," according to which behavioral tasks that produce highly replicable group-level effects often yield low test-retest reliability due to the inadequacy of traditional correlation methods in capturing individual differences between participants. Alongside the simple test-retest correlations, we employed a Bayesian generative model that was recently demonstrated to result in a more precise estimation of test-retest reliability. Two hundred and ninety-five participants completed an online version of the affordances task twice, with a one-week gap. Performance on the online version replicated results obtained under in-lab administrations of the task. While the simple correlation method resulted in weak test-retest measures of the different effects, the generative model yielded a good reliability assessment. The current results support the utility of the affordances task as a reliable behavioral tool for the assessment of group-level and individual differences in cognitive and visuomotor functioning. The results further support the employment of generative modeling in the study of individual differences.

What is word? The boundary conditions of task conflict in the Stroop task.

The Stroop task is characterized by two types of conflicts-information conflict (between the incongruent word and ink color) and task conflict (between the relevant color-naming task and the competing, irrelevant, stimulus-driven, word reading task). It is not yet clear what stimuli trigger the task of reading, and thus task conflict, and to what extent. In the current study, we applied a novel low-control (high neutral proportion) between-subject design to test the effect of different neutral conditions (symbols, same-letter strings, illegal-letter strings, pseudo-words, and real-words) on task conflict, in both manual and vocal response-types. Results indicated that in the manual task, a reverse facilitation effect, a signature of task conflict, appeared in all non-word conditions in a similar magnitude, but did not appear in the real-words condition. In the vocal task, reverse facilitation was found only in the symbols condition, regular facilitation was exhibited in all other neutral conditions, and larger facilitation appeared in the real-words condition. Our results indicate that the reading process and the activation of task conflict, depend on response-types (manual vs. vocal). In both response-types we found support for a word superiority effect, such that words trigger task conflict to a greater extent, however, we only observed an orthographic effect in the vocal response-type where stimuli consisting of letters triggered the reading task. We concluded that in the manual response-type, conflict arises only in the lexical route, whilst in the vocal response-type, conflict arises in the lexical and orthographic routes.

Neutral affordances: Task conflict in the affordances task.

Task conflict emerges when a stimulus triggers two or more competing tasks. To date, task conflict has been studied mainly using the color-word Stroop task. We hypothesized that task conflict also emerges in the affordances task between the goal-directed relevant task (e.g., classifying manipulable objects such as cups and pots), and the automatic, stimulus-driven, irrelevant task afforded by these objects (e.g., grasping their handles). Thus, we expected task conflict to manifest in both congruent and incongruent trials, separately from the well-known affordances response conflict that manifests in incongruent trials between responding with the right vs. the left hand. To this end, we aimed to identify a neutral condition for the affordances task. In Experiment 1, participants performed an affordances task that included images of manipulable objects and houses. While manipulable objects evoke automatic grasping tendencies, house images were hypothesized to serve as neutral, conflict-free stimuli. House images yielded shorter reaction time (RT) than incongruent trials, indicating that they may serve as neutral stimuli for the task. House images also yielded shorter RT than congruent trials, suggesting that task conflict manifests in congruent (as well as in incongruent) affordances trials. In Experiment 2 we manipulated cognitive control in the affordance task by creating low-control and high-control blocks. While both congruent and incongruent trials were impacted by this manipulation of cognitive control, neutral trials remained unaffected. These findings indicate that the affordances task involves conflicts at both the task level and the level of response, and can be used as a supplementary, non-linguistic measure of task conflict and the activation of task control.

Control over task conflict in the stroop and affordances tasks: an individual differences study.

Task conflict is a type of conflict that emerges when a stimulus triggers two or more competing tasks. In the Stroop task, task conflict occurs between the relevant color-naming task and irrelevant word reading task and can be observed mainly on congruent trials, which only involve task conflict and are devoid of additional conflict types. We hypothesized that task conflict also manifests in the affordances task between the relevant task (e.g., classifying manipulatable objects), and the automatic task afforded by the object (e.g., grasping the object), and is mostly evident on congruent trials. Using an individual differences design we assessed the relationship between control mechanisms operating on Stroop congruent and affordances congruent trials under conditions of high and low cognitive control requirements. We hypothesized that task control is employed in both tasks. One-hundred and twenty-three participants performed an affordances task and two blocks of a Stroop task, each requiring a different level of task control (high vs. low). In a hierarchical regression model, we found a significant and specific correlation between affordances congruent and Stroop congruent conditions only in the high-control block, designed to greatly engage participants' task control, thus linking the task control mechanism in both tasks. These results indicate that task control underlies diverse modalities of response (visuomotor and linguistic), independently of other conflict types. We suggest that the affordances task may serve as a supplementary tool for the assessment of task control in the lab.

The effect of food-related stimuli on inhibition in high vs. low restrained eaters.

Restrained eaters constantly limit their eating behavior to avoid gaining weight. Previous research suggests that fundamental deficits in response inhibition might play a role in the development of disinhibited eating among restrained eaters. The current study focuses on the impact of food vs. non-food stimuli on response inhibition in high vs. low restrained eaters. Seventy-five females (38 high and 37 low restrained eaters) completed a novel food stop-signal task in which they were required to discriminate between food and non-food images while inhibiting their response when a stop-signal appeared. The ability to inhibit a response was assessed separately for food and non-food trials, which were used to assess specific inhibition to food and general inhibitory abilities, respectively. Overall, high restrained eaters exhibited poorer response inhibition to non-food stimuli compared to low restrained eaters. Most importantly, high restrained eaters were better able to inhibit a response following presentation of food compared to non-food stimuli. In contrast, low restrained eaters were better at inhibiting a response following non-food compared to food stimuli. We suggest that this pattern is due to fast and strong activation of the response inhibition system in high restrained eaters when facing food stimuli - an activation which might later lead to a paradoxical breakdown of control over eating behavior.

The Role of Response Inhibition in Medicated and Unmedicated Obsessive-Compulsive Disorder Patients: Evidence from the Stop-Signal Task.

BACKGROUND: Numerous studies have investigated response inhibition (RI) in obsessive-compulsive disorder (OCD), with many reporting that OCD patients demonstrate deficits in RI as compared to controls. However, reported effect sizes tend to be modest and results have been inconsistent, with some studies finding intact RI in OCD. To date, no study has examined the effect of medications on RI in OCD patients. METHODS: We analyzed results from a stop-signal task to probe RI in 65 OCD patients (32 of whom were medicated) and 58 healthy controls (HCs). RESULTS: There was no statistically significant difference in stop-signal reaction time between the OCD group and the HC group, or between the medicated and unmedicated OCD patients. However, variability was significantly greater in the medicated OCD group compared to the unmedicated group. CONCLUSIONS: These results indicate that some samples of OCD patients do not have deficits in RI, making it unlikely that deficient RI underlies repetitive behaviors in all OCD patients. Future research is needed to fully elucidate the impact of medication use on stop-signal performance. Implications for future research on the cognitive processes underlying repetitive thoughts and behaviors are discussed.

Washing away your sins will set your mind free: physical cleansing modulates the effect of threatened morality on executive control.

The effect of threatened morality on negative emotions and on altruistic behaviour has been shown to diminish following physical cleansing (hand-washing). We hypothesised that threatened morality will broadly impair the executive control system, and that physical cleansing will moderate this detrimental effect. Thirty-seven participants were asked to write about an immoral deed they had committed, whereupon half of them were allowed to wipe their hands. Three executive control tasks-Stroop, stop-signal, and object interference-were then administered to all participants. Participants who had not wiped their hands, but not those who did, demonstrated impaired performance, compared to hand-washing controls, in all three tasks. We conclude that threatened morality has a detrimental effect on executive control, specifically on conflict monitoring and response inhibition, and that physical cleansing "frees" this system, counteracting the detrimental effects of morality threats. We discuss possible implications for obsessive-compulsive disorder, which is characterised by deficient executive control and in which both threatened morality and physical cleansing are central concerns.

Preparation time modulates pro-active control and enhances task conflict in task switching.

Performance in the Stroop task reflects two conflicts--informational (between the incongruent word and ink color) and task (between relevant color naming and irrelevant word reading). Neuroimaging findings support the existence of task conflict in congruent trials. A behavioral indication for task conflict--Stroop reverse facilitation--was found in previous studies under low task-control conditions. Task switching also causes reduction in task control because the task set frequently changes. We hypothesized that it would be harder to efficiently manage task conflicts in switching situations and, specifically, as cue-target interval (CTI) decreases. This suggestion was examined in two experiments using a combined Stroop task-switching design. We found a large interference effect and reverse facilitation that decreased with elongation of CTI. Results imply that task switching reduces pro-active task control and thereby enhances the informational and the task conflicts. This calls for a revision of recent control models to include task conflict.

Focused on the negative: emotions and visuospatial attention in generalized anxiety disorder.

Global-local visuospatial attention is a core mechanism which highly affects the way we process our visuospatial environment. The current study aimed to examine the effect of negative emotions on global-local visuospatial processing in participants with generalized anxiety disorder (GAD) and in healthy controls (HCs). Participants performed two versions of the global-local-arrow task: they were asked to determine the direction (left or right) of the global arrow or of the local arrows that composed it, with or without emotional prime-cues. In the non-emotional task and in the neutral-valence condition of the emotional task, the GAD group did not differ from that of HCs - both groups exhibited a classic global processing bias (reactions to the global dimension were faster and less affected by the local dimension). In the negative-valence condition, global processing bias was only slightly reduced in HCs and almost completely eliminated in the GAD group. The results of the current study suggest that, in non-emotional conditions, global processing bias does not differ significantly between individuals with GAD and HCs. However, task-irrelevant negative cues were found to have a greater impact in reducing global bias for individuals with GAD compared to HCs. Potential implications are discussed.

Fostering positive attitudes toward food in individuals with restrained eating: the impact of flexible food-related inhibition.

Individuals exhibiting restrained eating behaviors demonstrate increased inhibitory control when exposed to food-related stimuli, indicating the presence of an automatic food-inhibition association. Existing literature proposes that this association contributes to the devaluation of food within this population. Efforts to disrupt this association by promoting the complete elimination of the inhibition of food responses have resulted in increased food consumption but have also led to heightened food-related anxiety in individuals with restrained eating behaviors. In the current investigation, we investigated whether a novel flexible food response/inhibition computerized task could yield favorable changes in attitudes toward food in individuals with restrained eating. We randomly assigned 78 females who engage in restrained eating to one of three training groups. In the flexible response/inhibition group, participants were instructed to equally inhibit or respond to food stimuli. In the response group, participants consistently responded to food stimuli, while in the inhibition group, participants consistently inhibited their response to food cues. Implicit attitudes toward food were assessed both before and after the manipulation. To examine the stability of the effect of the training, participants also engaged in a seemingly unrelated bogus taste test. Our results revealed that only the flexible response/inhibition group demonstrated a significant improvement in positive attitudes toward high-calorie foods after eating, while there were no observable changes in negative attitudes among the other two groups. These findings suggest that promoting a balance between the responding and inhibiting responses to food stimuli can increase positive attitudes toward food amongst individuals with restrained eating.

Evidence for Automatic, Stimulus Driven, Arithmetic Processing of Single-digit Multiplication Problems.

Certain stimuli can automatically trigger different behaviors in a stimulus-driven manner. To investigate whether mathematical equations automatically trigger the tendency to engage in arithmetic processing, we asked whether the presentation of multiplication equations in an irrelevant dimension can trigger the automatic task of arithmetic processing and if so, which processes are involved. To that end, we employed a color-naming task in which participants had to name the color of different stimuli, such as: mathematical equations (e.g., 4 × 6 = 24), neutral-symbols (e.g., ####), neutral-words (e.g., building), and same-number strings (e.g., 11111), which appeared as one of four different colors. We found that mathematical equations and regular words in the irrelevant dimension triggered more task conflict (i.e., color naming's reaction time was longer) as compared to same-number strings. In addition, we found evidence for the automatic activation of different numerical processes; such that large-size equations (7 × 9 = 63) triggered more conflict as compared with small-size (2 × 3 = 6) equations and same-parity incorrect equations (3 × 2 = 8) triggered more conflict as compared to different-parity incorrect equations (4 × 2 = 9). We found no evidence indicating a distinction between the correct and incorrect equations. We discussed the relevance of the findings to the automaticity of arithmetic abilities and other domains in numerical cognition.

Letter to the Editor: Recent advances in research on cognition and emotion in OCD: a review.

Cognitive theories of obsessive-compulsive disorder (OCD) ascertain that catastrophic (mis)interpretations of normally occurring intrusive thoughts are causal to the onset and maintenance of OCD. Recently, Calkins, Berman and Wilhelm have highlighted research validating the cognitive model. However, the current comment article stresses various findings that challenge basic premises of the cognitive theory. Moreover, a review of clinical studies investigating cognitive and behavioral therapies for OCD questions the added value of cognitive interventions over and above behavior therapy consisting of exposure and response prevention for this disorder. We suggest an alternative, potentially more useful route of investigation, stressing executive (dis)functions as the cause of OCD patients to (automatically) act on internal and external stimuli. We further suggest that dysfunctional beliefs proposed as paramount in the pathogenesis of OCD according to the cognitive model may be less important and specific than formerly believed.

Proactive control affects task conflict beyond contingency learning.

Various models of the Stroop task suggest that proactive task control adaptation accounts for the modulation of task conflict in different conditions of the Stroop task, for example, when task conflict is very frequent or very infrequent. Other researchers have argued that a contingency learning of colour-word associations is the main contributor to the modulations of the Stroop effect. In this work, we constructed a design that controls for confounds that are suspected to rule out the role of control adaptation in the Stroop task. We focused on one type of conflict-task conflict and tested whether colour-naming of neutral-words (where task conflict is present) differed from colour-naming of neutral-symbols (where task conflict is not present) in four different conditions: mostly words-congruent, mostly words-incongruent, mostly words-neutral, or mostly non-words-shape. Importantly, the conditions used for the task conflict marker were identical in all four conditions. We found that the marker of task conflict (reaction time [RT] for neutral-words > RT for neutral-symbols) was significant in the mostly non-words-shape condition, where proactive task control is relaxed, but not in the mostly words conditions, where proactive task control is activated, with no difference between these three words conditions. These findings suggest that control adaptation is the main contributor to the modulations of the Stroop effect. The relevance of the results to the current literature is discussed and the results are explained in light of the proactive control-task conflict (PC-TC) model.

Global-Local Processing in ADHD Is Not Limited to the Visuospatial Domain: Novel Evidence From the Auditory Domain.

OBJECTIVE: Global-local visuospatial processing has been widely investigated in both healthy and clinical populations. Recent studies indicated that individuals with ADHD lack a global processing bias. However, the extant literature regarding global-local processing style focuses solely on the visual modality. METHODS: ADHD (N = 21) and typically developed (TD) controls (N = 24) underwent an auditory global-local task, in which they had to decide whether the melody is ascending or descending in global or local conditions. RESULTS: TD controls exhibited a classic global processing bias in the auditory task. The ADHD group exhibited no global processing bias, indicating similar processing for global and local dimensions, implying that individuals with ADHD are distracted by incongruent information in global and local conditions similarly, in both visual and auditory tasks. CONCLUSION: A lack of global processing bias in ADHD is not limited to the visuospatial modality and likely reflects a broader and more general processing style.