Predicting aggressive behavior with the aggressiveness-IAT

Explicit and indirect, latency-based measure of aggression in striking combat sports

Introduction

Aggression in sports is often perceived as a necessary trait for success, especially in martial arts. Aggression can be assessed both explicitly and implicitly, taking into account the dual processing model. The purpose of the research was to examine explicit and indirect, latency-based measure of aggression in competitive athletes practicing striking combat sports, according to gender and sports performance. At the same time, we verified whether aggression (implicit/unconscious and explicit) predicts sports performance in martial artists.

Materials and methods

A total of 85 athletes practicing striking combat sports took part in the research. For implicit, latency-based measure of aggression, an Implicit Associations Test (IAT) was used, while explicit aggression was assessed with the Romanian adaptation of the Makarowski's Aggression Questionnaire for martial arts athletes.

Results

Data analysis revealed (using multivariate analysis of variance) that athletes from striking combat sports having international sports performances registered significantly higher D-scores (IAT, p = 0.014) and lower values for Go-ahead factor (p = 0.006), compared to athletes without outstanding results. Goodman and Kruskal tau association test was used to check the existing associations between athletes' gender and martial arts athletes' level of explicit and implicit aggression. In addition, binomial logistic regression procedures were performed, predicting martial artists' likelihood to obtain higher sports results, based on explicit and indirect aggression.

Conclusion

A stronger association between Aggression and Others (at implicit/unconscious level) and a moderate level (generally) for Go-ahead factor of explicit aggression are associated with an increased likelihood of sports performances in athletes. In addition, male martial arts athletes are more persistent despite obstacles, remaining more on the offensive (no gender-related association were found in terms of indirect/unconscious aggression, and for Foul Play and Assertiveness factors of explicit aggression). The study underlines the importance of addressing athletes' subconscious level to promote more constructive behaviors in competitions.

Implicit aggressive self-concept in patients with obsessive-compulsive disorder: Results from an approach-avoidance task

BACKGROUND AND OBJECTIVES

Patients with obsessive-compulsive disorder (OCD) have reported higher anger and aggression than healthy individuals in previous studies using explicit measures. However, studies using implicit measures have demonstrated mixed results. The aim of the present study was to investigate implicit aggressiveness in OCD using an approach-avoidance task (AAT).

METHODS

Seventy-eight patients with OCD and 37 healthy controls underwent structured clinical interviews and measures of anger, OCD, and depressive symptoms as well as a computerized AAT that included aggressive, peaceful, negative, and positive stimuli.

RESULTS

In line with previous studies, patients with OCD reported higher scores on explicit anger. With respect to the implicit measure, repeated measures ANOVAs did not show any differences in mean reaction times for pushing compared to pulling aggressive versus peaceful and negative versus positive words. However, analyses of specific OCD symptom dimensions demonstrated significantly faster reaction times for pulling compared to pushing aggressive words for patients with high scores in the OCD symptom dimensions obsessing and hoarding.

LIMITATIONS

Eighty percent of patients with OCD showed psychiatric comorbidities and all were seeking treatment.

CONCLUSION

The present study supports previous studies reporting the absence of higher aggressiveness in patients with OCD compared to healthy controls using implicit measures. However, in contrast to previous studies, we found an implicit approach bias towards aggressive self-statements for OCD patients scoring high in the symptom dimensions obsessing and hoarding compared to healthy controls. Future studies should further elucidate putative functional relationships between different OCD symptom dimensions and implicit aggressiveness.

Studying the social mind: An updated summary of findings from the Vietnam Head Injury Study

Lesion mapping studies allow us to evaluate the potential causal contribution of specific brain areas to human cognition and complement other cognitive neuroscience methods, as several authors have recently pointed out. Here, we present an updated summary of the findings from the Vietnam Head Injury Study (VHIS) focusing on the studies conducted over the last decade, that examined the social mind and its intricate neural and cognitive underpinnings. The VHIS is a prospective, long-term follow-up study of Vietnam veterans with penetrating traumatic brain injury (pTBI) and healthy controls (HC). The scope of the work is to present the studies from the latest phases (3 and 4) of the VHIS, 70 studies since 2011, when the Raymont et al. paper was published (Raymont et al., 2011). These studies have contributed to our understanding of human social cognition, including political and religious beliefs, theory of mind, but also executive functions, intelligence, and personality. This work finally discusses the usefulness of lesion mapping as an approach to understanding the functions of the human brain from basic science and clinical perspectives.

Games, hormones, and "dark" personalities: Dark tetrad and the effects of violent gaming on aggression, cortisol, and testosterone

We investigated how playing a violent versus non-violent video game affects cortisol and testosterone levels, whether these hormonal changes increase implicit aggressive cognition, and whether so-called Dark Tetrad personality traits (i.e., Machiavellianism, psychopathy, narcissism, everyday sadism) moderate these effects. Fifty-four men played either a violent or a non-violent video game for 25 min. Participants provided salivary samples at the beginning of the experiment (T1), after 25 min of gameplay (T2), and 20 min after gameplay ended (T3). In the violent condition, participants showed a significant decrease in cortisol levels (T1 to T2) and a significant negative trend in cortisol levels from T1 to T3. Moreover, higher Machiavellianism scores were related to a significantly stronger decrease in cortisol (T1 to T2) in this condition. In the non-violent condition, however, participants with higher scores in Machiavellianism had a higher increase in cortisol (T1 to T2). In contrast to changes in hormonal levels, there were no significant effects on implicit aggressive cognition. The present findings illustrate the complex interplay between personality, hormones, and game content, thus further specifying current notions on the effects of violent video games. Playing a violent video game can have a stress-reducing calming effect depending on personality traits such as Machiavellianism and the psychological need satisfaction associated with it. Also, the fact that VVG exposure was not automatically accompanied by an aggression-increasing effect proves that simple cause-effect models are not sufficiently specified without taking the underlying mechanisms into account.

COVID-19 emergency: the influence of implicit attitudes, information sources, and individual characteristics on psychological distress, intentions to get vaccinated, and compliance with restrictive rules

BACKGROUND

To limit the spread of the COVID-19 emergency, a massive vaccination program was implemented and restrictive measures were imposed on the population. However, the propensity to adhere to the vaccination program has struggled to take off. Moreover, complying with the restrictive rules and maintaining social distancing have been highly distressing for many individuals.

PARTICIPANTS AND PROCEDURE

Italian participants (N = 140, females = 65%, mean age = 29.50, SD = 10.80) were presented with an online survey consisting of multiple-choice questions and two single-category implicit association tests (SC-IATs). One SC-IAT evaluated the tendency of participants to automatically associate personal protective equipment (PPE) and vaccines with safety or danger; the other evaluated their tendency to automatically associate social situations with good or bad. Multiple-choice questions explored individual, social, and environmental factors that were expected to contribute to vaccine propensity, compliance with restrictive rules, and feelings of distress.

RESULTS

Using scientific information sources was related to implicitly associating PPE and vaccines with safety, which in turn was associated with the propensity to get the vaccine. Moreover, being female, young, unsatisfied with social relationships, having suffered health and economic consequences due to the pandemic, and having negative implicit attitudes toward social situations contributed to increasing feelings of distress.

CONCLUSIONS

Communication may contribute to individuals' behavior and preferences and it can also be associated with implicit attitudes, becoming consequently one of the main leverages to reduce vaccine hesitancy. Recovery programs should prioritize the development of interventions aimed at fostering psychological well-being through the enhancement of social contacts.

The Role of Dynamic Social Norms in Promoting the Internalization of Sportspersonship Behaviors and Values and Psychological Well-Being in Ice Hockey

Conducted among parents of young ice hockey players, this field experiment tested if making salient increasingly popular (i.e., dynamic) social norms that promote sportspersonship, learning, and having fun in sports, increases parents' own self-determined endorsement of these behaviors and values, improves their psychological well-being, and impacts on their children's on-ice behaviors. Hockey parents (N = 98) were randomly assigned to the experimental condition (i.e., presenting dynamic norms that increasingly favor sportspersonship, learning, and fun) vs. control condition (i.e., presenting neutral information). Parents' motivations for encouraging their child to learn and to have fun in hockey were then assessed. Score sheets for the games that followed the study provided access to their children's on-ice behaviors (i.e., penalties), as indicators of sportspersonship. Parents in the experimental condition reported higher self-determination for encouraging their child to learn and have fun in hockey compared to parents in the control condition. Furthermore, children of parents in the experimental condition had more assists. A mediation model revealed that the dynamic norms manipulation increased parents' self-determined motivation for encouraging their child to learn and to have fun in hockey, which in turn, predicted higher psychological well-being (i.e., lower anxiety, more vitality). Together, these results provide support for the contention that highlighting increasingly popular social norms that promote sportspersonship, learning, and fun in sports, represents a promising strategy for creating positive social change in this life context.

PUT DO MRAČNE STRANE POSLA:

Nepoželjna organizacijska ponašanja (NOP) štetna su ponašanja koja donose milijunske gubitke organizacijama, a ujedno škode psihološkoj dobrobiti i produktivnosti zaposlenika. Ličnost je jedna od glavnih determinanti NOP-a, no istraživanja odnosa ličnosti i NOP-a uglavnom su se fokusirala na svjesni aspekt ličnosti, tzv. eksplicitnu ličnosti i tek su u manjem broju razmatrala psihološke mehanizme putem kojih ličnost djeluje na NOP. Ovaj rad uključuje pregled istraživanja odnosa ličnosti i NOP-a pri čemu, u odnosu na ranije preglede, razmatra i kako nesvjesni aspekti ličnosti (tzv. implicitna ličnost) mogu pomoći u objašnjavanju NOP-a. U radu se fokusiram se na dvije metode koje pokazuju najveći potencijal za predviđanje radnog ponašanja – Test uvjetovanog rezoniranja i Test implicitnih asocijacija. Nakon toga, razmatram psihološke mehanizme putem kojih eksplicitna i implicitna ličnost djeluju na NOP, koristeći stavove prema poslu i organizaciji i emocije na radnom mjestu kao varijable koje objašnjavaju odnos ličnosti i NOP-a. Konačno, na temelju pregleda istraživanja odnosa ličnosti, stavova, emocija i NOP-a, razvijam teoretski model odnosa ove četiri varijable, koji olakšava razumijevanje složenih psiholoških mehanizama putem kojih implicitna i eksplicitna ličnost dovode do NOP-a.

Anger and aggressiveness in obsessive-compulsive disorder (OCD) and the mediating role of responsibility, non-acceptance of emotions, and social desirability

According to psychodynamic and cognitive models of obsessive-compulsive disorder (OCD), anger and aggression play an important role in the development and maintenance of the disorder. (Sub-) clinical samples with OCD have reported higher anger and anger suppression. Patients with checking-related symptoms of OCD showed a less aggressive self-concept as assessed by an Implicit Association Test (IAT). This study assessed anger and aggressiveness self-concepts in OCD as well as possible mediators of the link between OCD and aggressiveness. A total of 48 patients with OCD and 45 healthy controls were included. Measures included the State-Trait Anger Expression Inventory-II and an aggressiveness self-concept IAT (Agg-IAT). An inflated sense of responsibility, non-acceptance of emotions, and social desirability were tested as mediators. As expected, patients with OCD reported higher trait anger and anger suppression compared to healthy controls. Contrary to hypotheses, the aggressiveness self-concept (Agg-IAT) did not differ between groups. The inflated sense of responsibility mediated the relationship between group and anger suppression. Non-acceptance of negative emotions mediated the relationship between group and trait anger, as well as anger suppression. However, comorbidities and medication may account for some effect in anger suppression. Elevated trait anger and anger suppression in OCD patients could be explained by dysfunctional beliefs or maladaptive emotion regulation strategies. Emotion regulation therapy might help to enhance awareness and acceptance of emotions and possibly improve treatment outcomes.

Expanding the Scope of Implicit Personality Assessment: An Examination of the Questionnaire-Based Implicit Association Test (qIAT)

Self-report questionnaires can only yield information that people are able and willing to report, but implicit assessment methods are not commonly used in mainstream personality research. The Questionnaire-based Implicit Association Test (qIAT) was designed to address the limitations associated with the conventional self-concept IAT, and it enables an indirect assessment that is based on the items of standard self-reports. The present studies examined the psychometric properties of the qIAT across two personality constructs. Study 1 (N = 528) provided support for the internal consistency, test-retest reliability and convergent and discriminant validity of the qIAT that measured extraversion. Study 2 (N = 164) supported the reliability and validity of the qIAT assessment of conscientiousness, which predicted who returned to complete the second session of the study two weeks later, for which participants were paid in advance. This same prediction effect was marginally significant in Study 3 (N = 200), and across both Studies 2 and 3 the qIAT prediction of the criterion behavior was incremental to the parallel self-report questionnaire. Taken together, findings support the reliability and validity of the qIAT, which enables the indirect measurement of a wide variety of distinct personality constructs, currently measured only by self-report scales.

Frustration and Violence in Mobile Video Games

Abstract. This study tests two competing hypotheses, one based on the general aggression model (GAM), the other on the self-determination theory (SDT). GAM suggests that the crucial factor in video games leading to increased aggressiveness is their violent content; SDT contends that gaming is associated with aggression because of the frustration of basic psychological needs. We used a 2×2 between-subject experimental design with a sample of 128 undergraduates. We assigned each participant randomly to one experimental condition defined by a particular video game, using four mobile video games differing in the degree of violence and in the level of their frustration-invoking gameplay. Aggressiveness was measured using the implicit association test (IAT), administered before and after the playing of a video game. We found no evidence of an association between implicit aggressiveness and violent content or frustrating gameplay.

Implicitly measured aggressiveness self-concepts in women with borderline personality disorder as assessed by an Implicit Association Test

BACKGROUND

Aggressiveness resulting from inappropriately intense anger plays a major role in borderline personality disorder (BPD) and research using self-report measures has consistently found elevated levels of aggression in this condition. However, while self-report assesses explicit dimensions of the self-concept, it cannot elucidate implicit processes that are at least equally important as they guide the perceptions of the self and influence behavioral responses. The present study aimed to extend the research on aggressiveness self-concepts in BPD utilizing an indirect latency-based measure.

METHODS

Twenty-nine female inpatients with BPD and 21 healthy women were assessed with an aggressiveness self-concept Implicit Association Test (Agg-IAT) using reaction time measurements to determine the relative strengths of associations between the self vs. others and aggression vs. peacefulness. Additionally, participants completed self-report questionnaires capturing aggressiveness and BPD symptoms.

RESULTS

Women with BPD had a significantly more aggressive self-concept as indicated by the Agg-IAT than the control group. Moreover, they rated themselves significantly more aggressive on all dimensions than the controls. As expected, correlations between the Agg-IAT and the self-reported aggressiveness dimensions were low (mean r = -.31).

LIMITATIONS

The modest sample size and the disregard of a clinical control group limit the generalizability and specificity of our findings.

CONCLUSIONS

This study extends prior findings on aggression in BPD in that women with BPD do not only explicitly conceive themselves as more aggressive, but also exhibit implicitly more aggressive self-concepts than healthy controls. Because implicit and explicit self-related operations are related, but distinct processes, our results may hold clinical and therapeutic implications.

Ostracism Increases Automatic Aggression: The Role of Anger and Forgiveness

While research on the “ostracism-aggression” link has focused on controlled processes in aggression, little effort has been devoted to examining the relation between ostracism and automatic aggression. Based on theories of aggression, we found that ostracized participants reported higher levels of automatic aggression than included participants (Studies 1 and 2). Furthermore, the association between ostracism and automatic aggression was mediated by anger and was especially prominent for people low in forgiveness (as compared to people high in forgiveness; Study 3). The implications of these findings are discussed.

Cognitive predictors of reactive and proactive aggression in a forensic sample: A comparison with a non-clinical sample

This study aimed at examining cognitive predictors of reactive and proactive aggression in a forensic-psychiatric (n = 80) and a non-clinical sample (n = 98; Brugman et al., 2015). Three different cognitive predictors were incorporated: (1) attentional bias towards aggressive stimuli (measured with Emotional Stroop task) and towards angry faces (measured with a visual search task); (2) interpretation biases (measured with Aggressive Interpretative Bias Task (AIBT) and a vignette task), and (3) implicit self-aggression association (measured with a Single-Target Implicit Association Task). To measure aggression, the Reactive-Proactive Aggression Questionnaire (RPQ) and the Taylor Aggression Paradigm (TAP) were used. An automatic self-aggression association positively predicted proactive aggressive behavior on the TAP in both samples. Furthermore, this self-aggression association predicted, increased self-reported proactive aggression (RPQ) in the forensic sample only. Pain, injury, and danger interpretations reported on the vignettes, negatively predicted self-reported proactive aggression in both samples. A stronger aggressive interpretation bias on the AIBT predicted more reactive aggressive behavior (TAP) in the non-clinical sample only. Taken together, findings show both common and distinct mechanisms in reactively vs. proactively driven aggressive behavior.

A competitively designed version of the point subtraction aggression paradigm is related to proactive aggressive and psychopathic traits in males

The Point Subtraction Aggression Paradigm (PSAP) is a well-validated and frequently applied behavioral paradigm for provocation and quantification of reactive aggressive behavior in laboratory settings. Here, we design and test a newly developed PSAP version in its ability to quantify proactive aggressive behavior. A group of 119 male volunteers was allocated to the conventional PSAP and two other variants of the PSAP. The first PSAP adaptation intended to abet proactive aggression by monetary reward for aggressive actions. In the second variant, a highly competitive situation was created. In addition, two sets of aggression questionnaires, related to proactive and reactive aggressive and psychopathic traits, were used (Reactive-Proactive Aggression Questionnaire (RPQ), Psychopathic Personality Inventory-Revised (PPI-R)). Our results showed strong positive correlations among RPQ/PPI-R and aggressive behavior only for the new competitive version of the PSAP. In contrast, the scores of these scales showed weak and non-significant correlations with observed aggression in the two PSAP variants. The scores for reactive aggression were not significantly associated with any of the PSAP versions. These data indicate that aggression on the newly developed competitive PSAP design is mainly driven by proactive aggressive mechanisms.

Is the Implicit Association Test for Aggressive Attitudes a Measure for Attraction to Violence or Traumatization?

Abstract. Traumatic exposure is particularly devastating for those who, at a young age, have become combatants or experienced massive adversity after abduction by armed movements. We investigated the impact of traumatic stressors on psychopathology among war-affected young men of Northern Uganda, including former child soldiers. Adaptation to violent environments and coping with trauma-related symptoms often result in an increasing appetite for violence. We analyze implicit attitudes toward violence, assessed by an Implicit Association Test (IAT), among 64 male participants. Implicit attitudes varied as a function of the number of experienced traumatic event types and committed offense types. As the number of traumatic experiences and violence exposure increased, more appetitive aggression was reported, whereas the IAT indicated increasingly negative implicit attitudes toward aggression. The IAT was also the strongest predictor of cortisol levels. Diffusion-model analysis was the best way to demonstrate IAT validity. Implicit measures revealed the trauma-related changes of cognitive structures.

Implicit aggressiveness in patients with obsessive-compulsive disorder as assessed by an Implicit Association Test

BACKGROUND AND OBJECTIVES

Cognitive models of obsessive-compulsive disorder (OCD) highlight the role of cognitive biases for the development of the disorder. One of these biases, an inflated sense of responsibility has been associated with higher anger scores and latent aggression on self-report scales, especially in patients with compulsive checking. Validity of self-report assessment is, however, compromised by inaccuracy, social desirability, and low metacognitive awareness of traits and behaviors in patients. The aim of the present study was to extend the research on latent aggression in individuals with OCD by using an indirect, implicit measure of aggression.

METHODS

Fifty-eight patients with OCD and 25 healthy controls were assessed with an Aggressiveness-Implicit Association Test (IAT), which is a reaction time task that assesses the strength of associations between the concept of "aggressiveness" and "me" compared to others.

RESULTS

Contrary to our expectation, OCD patients with checking symptoms showed a more peaceful implicit self-concept than healthy controls. This result was corroborated by negative correlations between checking symptoms and implicit aggressiveness in the OCD sample.

LIMITATIONS

No self-report measures on aggression or anger were included in the study.

CONCLUSIONS

In comparison to previous research using self-report measures, our study indicates that implicit aspects of aggression do indeed differ from controlled aspects in patients with checking compulsions. Future research is necessary to better understand the role of aggressiveness in OCD and to derive implications for therapy.

Brain Regions Influencing Implicit Violent Attitudes: A Lesion-Mapping Study

Increased aggression is common after traumatic brain injuries and may persist after cognitive recovery. Maladaptive aggression and violence are associated with dysfunction in the prefrontal and temporal cortex, but such dysfunctional behaviors are typically measured by explicit scales and history. However, it is well known that answers on explicit scales on sensitive topics--such as aggressive thoughts and behaviors--may not reveal true tendencies. Here, we investigated the neural basis of implicit attitudes toward aggression in humans using a modified version of the Implicit Association Task (IAT) with a unique sample of 112 Vietnam War veterans who suffered penetrating brain injury and 33 healthy controls who also served in combat in Vietnam but had no history of brain injury. We hypothesized that dorsolateral prefrontal cortex (dlPFC) lesions, due to the crucial role of the dlPFC in response inhibition, could influence performance on the IAT. In addition, we investigated the causal contribution of specific brain areas to implicit attitudes toward violence. We found a more positive implicit attitude toward aggression among individuals with lesions to the dlPFC and inferior posterior temporal cortex (ipTC). Furthermore, executive functions were critically involved in regulating implicit attitudes toward violence and aggression. Our findings complement existing evidence on the neural basis of explicit aggression centered on the ventromedial prefrontal cortex. These findings highlight that dlPFC and ipTC play a causal role in modulating implicit attitudes about violence and are crucially involved in the pathogenesis of aggressive behavior.

SIGNIFICANCE STATEMENT

Maladaptive aggression and violence can lead to interpersonal conflict and criminal behavior. Surprisingly little is known about implicit attitudes toward violence and aggression. Here, we used a range of techniques, including voxel-based lesion-symptom mapping, to examine the causal role of brain structures underpinning implicit attitudes toward aggression in a unique sample of combat veterans with traumatic brain injury. We found that damage to the dorsolateral prefrontal cortex (dlPFC) led to a more positive implicit attitude toward violence that under most normal situations would be considered inappropriate. These results suggest that treatments aimed at increasing cognitive control using cognitive behavioral therapies dependent on the intact dlPFC could treat aggressive and violent behavior.

Cognitive predictors of violent incidents in forensic psychiatric inpatients

This study tested the predictive value of attentional bias, emotion recognition, automatic associations, and response inhibition, in the assessment of in-clinic violent incidents. Sixty-nine male forensic patients participated and completed an Emotional Stroop to measure attentional bias for threat and aggression, a Single Target - Implicit Association Task to assess automatic associations, a Graded Emotional Recognition Task to measure emotion recognition, and an Affective Go/NoGo to measure response inhibition. Violent incidents were derived from patient files and scored on severity level. The predictive value of level of psychopathy was tested with the Psychopathy Checklist - Revised (PCL-R). Generalized linear mixed model analyses showed that increased attention towards threat and aggression, difficulty recognizing sad faces and factor 2 of the PCL-R predicted the sum of violent incidents. Specifically, verbal aggression was predicted by increased attention towards threat and aggression, difficulty to recognize sad and happy faces, and PCL-R factor 2; physical aggression by decreased response inhibition, higher PCL-R factor 2 and lower PCL-R factor 1 scores; and aggression against property by difficulty recognizing angry faces. Findings indicate that cognitive tasks could be valuable in predicting aggression, thereby extending current knowledge on dynamic factors predicting aggressive behavior in forensic patients.

Elicited Awe Decreases Aggression

Awe is a feeling of wonder and amazement in response to experiencing something so vast that it transcends one's current frames of reference. Across three experiments ( N = 557), we tested the inhibition effect of awe on aggression. We used a narrative recall task paradigm (Studies 1 and 2) and a video (Study 3) to induce the emotion of awe. After inducing awe, we first examined participants’ emotion and their sense of ‘small self’, and then the manifestation of aggressiveness in a Shooting Game (Study 1), Tangram Help/Hurt Task (Studies 2 and 3) and Aggression-IAT (Study 3), respectively. Results indicated that awe reduced aggression and increased prosociality and a sense of small self relative to neutral affect and positive emotions of happiness and amusement. Mediation analyses evidenced mixed support for a sense of small self mediating the effect of awe on aggression and prosociality.

Ego Depletion Moderates the Influence of Automatic and Controlled Precursors of Reactive Aggression

From a dual-systems perspective, it has been proposed that predictive validity of whether individuals act out or stifle their reactive aggression will be maximized if (a) automatic and (b) controlled precursors of aggression are assessed and (c) situational boundaries in favor of acting out or restraining oneself are specified. In the present research we experimentally manipulated participants’ self-regulatory efforts in an ego depletion paradigm and subsequently measured reactive aggression in the Taylor Aggression Paradigm. Assessing automatic and controlled precursors of reactive aggression via an Implicit Association Test of Aggressiveness (Agg-IAT) and self-report reactive aggressiveness questionnaire, respectively, we demonstrated a theoretically expected double dissociation: Reactive aggression of ego depleted individuals was predicted by the implicit measure whereas non-depleted participants’ reactive aggression was predicted by their explicit self-reports. The results corroborate the usefulness of both explicit and implicit measures of aggressiveness and point to boundary conditions of these measures’ predictive validity.