The approach-avoidance task (AAT) is an implicit task that measures people’s behavioral tendencies to approach or avoid stimuli in the environment. In recent years, it has been used successfully to help explain a variety of health problems (e.g., addictions and phobias). Unfortunately, more recent AAT studies have failed to replicate earlier promising findings. One explanation for these replication failures could be that the AAT does not reliably measure approach-avoidance tendencies. Here, we first review existing literature on the reliability of various versions of the AAT. Next, we examine the AAT’s reliability in a large and diverse sample (N = 1077; 248 of whom completed all sessions). Using a smartphone-based, mobile AAT, we measured participants’ approach-avoidance tendencies eight times over a period of seven months (one measurement per month) in two distinct stimulus sets (happy/sad expressions and disgusting/neutral stimuli). The mobile AAT’s split-half reliability was adequate for face stimuli (r = .85), but low for disgust stimuli (r = .72). Its test–retest reliability based on a single measurement was poor for either stimulus set (all ICC1s < .3). Its test–retest reliability based on the average of all eight measurements was moderately good for face stimuli (ICCk = .73), but low for disgust stimuli (ICCk = .5). Results suggest that single-measurement AATs could be influenced by unexplained temporal fluctuations of approach-avoidance tendencies. These fluctuations could be examined in future studies. Until then, this work suggests that future research using the AAT should rely on multiple rather than single measurements.

<p>  </p> <p>This study investigates consumers’ moral-decision making process when they become aware of brands’ controversial actions. Specifically, this study aims to understand the effects of consumers’ cognitive and affective responses on their moral judgments after learning about the controversy of brands conducting animal testing, which in turn impacts their brand switching intention. The current study also considers consumers’ approach-avoidance conflicts in the moral-decision making process in which consumers confront moral dilemmas. The particular brands’ controversial action of interest for this study is personal care brands’ conducting animal testing on their products and selling animal-tested products because many believe that animal testing is only vital for biomedical research purposes but not for pursuing beauty purposes. This study builds a conceptual model depicting the consumer moral decision-making process based on Rest's (1994) and Schwartz’s (2015) ethical decision-making (EDM) theory and Sirgy’s (1986) self-congruence theory. To test the model, highly valid responses were collected from 454 U.S. nationwide consumers through Amazon’s Mechanical Turk and analyzed by structural equation modeling. The results indicated that: (1) consumers’ affective response (outward-focused emotion) and cognitive response (moral awareness) both provoked their moral incongruence and brand switching intention, (2) consumers’ cognitive response had a negative and significant impact on their moral disengagement, but moral disengagement had a marginal impact on brand switching intentions, (3) consumers’ affective response has a stronger impact on their moral judgment than cognitive, and their affective response can directly lead to brand switching intention, and lastly, (4) moral incongruence and moral disengagement mediated the effects of moral awareness and outward-focused emotion on brand switching intention. Finally, the research findings contribute to the consumer science literature in the area of consumers' moral decision-making process. For practical contributions, this study encourages companies to conduct practice that follows general consumers' moral beliefs and values to avoid losing their loyal customers. </p>

Résumé : L’objectif de cette thèse était d’investiguer l’influence des émotions sur l’organisation biomécanique de mouvements volontaires complexes, c’est-à-dire mobilisant l’ensemble du corps. L’effet des émotions a été testé par le biais de l’hypothèse de la direction motivationnelle selon laquelle 1) les stimuli plaisants faciliteraient les comportements d’approche et perturberaient les comportements d’évitement et 2) les stimuli déplaisants faciliteraient les comportements d’évitement et perturberaient les comportements d’approche. Deux modèles expérimentaux du mouvement complexe ont été choisis : l’initiation du pas vers l’avant et vers l’arrière (étude 1) et l’élévation latérale de la jambe (études 2 à 4). Les émotions étaient manipulées en exposant les participants à des images de l’International Affective Pictures System (induisant des émotions plaisantes et déplaisantes, étude 1) et en plaçant les participants au bord d’une plateforme surélevée (induisant une peur de chuter, études 2 à 4). Les mouvements étaient réalisés sur une plateforme de force (études 1 à 3). La cinématique du mouvement de la jambe oscillante était enregistrée grâce au système de capture de mouvements VICON (études 2 et 3). Les paramètres psychologiques (dimension de valence et d’activation des émotions, peur de chuter) étaient évalués grâce à des questionnaires. Les résultats de la première étude ont montré que les émotions plaisantes facilitaient les comportements d’approche (en termes de réactivité) et perturbaient les comportements d’évitement (en termes de vitesse du centre des masses lors des ajustements posturaux anticipateurs (APA) associés à un pas vers l’arrière), comparativement aux images déplaisantes et neutres. Cependant ces images semblaient aussi pouvoir perturber les comportements d’approche (en termes de pic de vitesse du centre des masses lors de l’exécution du pas vers l’avant). Les résultats de la deuxième étude ont démontré que les comportements d’approche envers la menace posturale (c’est-à-dire le vide) étaient perturbés (en termes d’amplitude et de durée des APA), comparativement aux comportements d’évitement. La troisième étude s’est ensuite intéressée à l’existence de différences interindividuelles dans la relation entre la menace posturale (et donc la peur de chuter) et l’organisation du mouvement volontaire. Les résultats ont révélé que la confiance en l’équilibre était un facteur de protection à la menace posturale. Ainsi, les participants reportant une forte confiance en leur équilibre étaient moins perturbés par la menace posturale que les participants reportant une faible confiance en leur équilibre. Enfin, la quatrième étude a cherché à expliquer l’existence de ces différences interindividuelles. Les résultats ont montré que l’estime globale de soi pouvait expliquer une partie de ces différences. En conclusion, les résultats de cette Thèse ne semblent confirmer que partiellement l’hypothèse de la direction motivationnelle. Pris ensemble, ces résultats ont permis d’améliorer la compréhension des processus sous-jacents à l’influence des émotions sur l’organisation du mouvement volontaire.Mots clés : Ajustements Posturaux Anticipateurs, Approche-Évitement, Contrôle Moteur, Émotions, Hypothèse de la Direction Motivationnelle / The aim of this thesis is to investigate the influence of emotions on the planning and execution of whole body voluntary movement. The effect of emotions was test thanks to the motivational direction hypothesis which supposed that 1) pleasant stimuli should facilitate approach and perturb avoidance behaviors. 2) Unpleasant stimuli should facilitate avoidance and perturb approach behaviors. Two experimental protocols have been chosen to pursue the investigation: Forward and backward gait initiation (study 1) and lateral elevation of the leg (studies 2-4). The emotions were manipulated by exposing the subjects to pictures of the International Affective Pictures System (inducing pleasant and unpleasant emotions, study 1) and by placing the subjects at the edge of an elevated platform (inducing fear of falling). Movements were performed on force platform (studies 1-3). Kinematic parameters of leg movement were recorded by the system of motion capture VICON (studies 2 and 3). Psychological parameters (valence and arousal dimensions of emotions fear of falling) were assessed by questionnaires. Results of the first study showed that pleasant pictures facilitated approach behaviors (as observed in the reactivity) and perturbed avoidance behaviors (as observed in the velocity of centre of mass during anticipatory postural adjustment (APA) prior to the execution of a backward step), compared to unpleasant or neutral pictures. However, these pleasant pictures also perturbed approach behaviors (as observed in the peak of centre of mass velocity during the execution of a forward step). Results of the second study showed that approach behaviors toward the postural threat (i.e, the void) were perturbed (as observed in the amplitude and duration of APA), compared to avoidance behaviors. The third study focused on the inter-individual differences in the relation between postural threat and organization of movement. Results revealed that balance confidence of the participants dealing with increased postural threat. In other terms, participants reported a high confidence in their own balance control were least perturbed than those reported a low balance confidence and vice versa. Finally, in the fourth study we tried to explain these inter-individual differences. The self-esteem seems to explain these differences. In conclusion, the results of this thesis seem to partially confirm the hypothesis of motivational direction. Put together, the results help improve our general understanding of the influence of emotions on the planning and execution of voluntary movements.Keywords: Anticipatory Postural Adjustments, Approach-Avoidance, Emotions, Motivational Direction Hypothesis, Motor Control

Introduction: The emergence of Pavlovian-to-instrumental transfer (PIT) research in the human neurobehavioral domain has been met with increased interest over the past two decades. A variety of PIT tasks were developed during this time; while successful in demonstrating transfer phenomena, existing tasks have limitations that should be addressed. Herein, we introduce two PIT paradigms designed to assess outcome-specific and general PIT within the context of addiction. - Materials and Methods: The single-lever PIT task, based on an established paradigm, replaced button presses with joystick motion to better assess avoidance behavior. The full transfer task uses alcohol and nonalcohol rewards associated with Pavlovian cues and instrumental responses, along with other gustatory and monetary rewards. We constructed mixed-effects models with the addition of other statistical analyses as needed to interpret various behavioral measures.- Results: Single-lever PIT: both versions were successful in eliciting a PIT effect (joystick: p < 0.001, ηp² = 0.36, button-box: p < 0.001, ηp ² = 0.30). Full transfer task: it was determined that the alcohol and nonalcoholic reward cues selectively primed their respective reward-associated responses (gustatory version: p < 0.001, r = 0.59, and monetary version: p < 0.001, r = 0.84). The appetitive/aversive cues resulted in a general transfer effect (gustatory: p < 0.001, ηp² = 0.09, and monetary: p < 0.001, ηp ² = 0.17). - Discussion/Conclusion: Single-lever PIT: PIT was observed in both task versions. We posit that the use of a joystick is more advantageous for the analysis of avoidance behavior. It evenly distributes movement between approach and avoid trials, which is relevant to analyzing fMRI data. Full transfer task: While gustatory conditioning has been used in the past to elicit transfer effects, we present the first paradigm that successfully elicits both specific and general transfers in humans with gustatory alcohol rewards.

L'une des caractéristiques principales de la méditation de pleine conscience est la réalisation que les événements perçus ou imaginés ne sont pas nécessairement une représentation exacte de la réalité, un processus connu sous le nom de déréification. La déréification est aussi l'objectif de nombreuses approches psychothérapeutiques, puisque l'on sait que l'immersion excessive dans le mental peut être liée à la détresse psychologique et à certains troubles psychiatriques. L'objectif de notre étude était d'évaluer dans quelle mesure la réification des contenus mentaux (réalisme subjectif) contribue aux dispositions automatiques et de comprendre les mécanismes permettant aux pratiques de méditation de les modifier. Notre hypothèse principale était que la reconnaissance du réalisme subjectif grâce aux pratiques méditatives de pleine conscience réduit le biais cognitif. Nous avons mené deux études auprès de méditants novices et expérimentés. Dans la première nous avons exploré l'effet d'une instruction brève de pleine présence sur l'attitude envers la nourriture, pour étudier comment le réalisme subjectif module les tendances automatiques d'approche et d'évitement. La seconde étude nous a permis d'explorer l'impact de la méditation sur la modulation des attentes sémantiques automatiques dans un paradigme de narration. Nous avons adopté une approche neurophénoménologique, combinant des données moléculaires, physiologiques, électroencéphalographiques et comportementales, avec des données à la première personne recueillies à l'aide d'auto-évaluations et d'entretiens qualitatifs. Dans l'ensemble, nos résultats multimodaux ont confirmé notre hypothèse selon laquelle la déréalisation peut entraîner la réduction du biais cognitif. Les résultats de l'exploration phénoménologique indiquent que les participants ont utilisé différentes stratégies cognitives pour réaliser la déréification, et que de telles stratégies varient en fonction de l'expérience en méditation. Les participants novices utilisent plus souvent des stratégies de type réévaluation cognitive et régulation émotionnelle, qui se reflètent dans la modulation des composantes tardives des potentiels évoqués (PE) cérébraux. En revanche les méditants utilisent moins souvent des stratégies élaboratives, en accord avec la modulation de composantes plus précoces des PE. / One of the key features of Mindful meditation is realizing that imagined or perceived events are not necessarily an accurate depiction of reality, a process known as dereification. Dereification is also a target of many psychotherapeutic approaches, as excessive immersion into one's mental contents has been related to psychological distress and several psychiatric conditions. The aim of this study was to investigate to what extent engagement with mental content as being real (i.e. subjective realism) can bias automatic tendencies toward the world, and to elucidate the mechanisms by which meditation practices can modulate it. Our main hypothesis was that recognizing subjective realism during mindfulness-related practices de-automatizes cognitive bias.We ran two studies in naïve and experienced meditators: Firstly, we explored the effect of a brief mindful-attention instruction on a food engagement paradigm to investigate how subjective realism modulates automatic approach-avoidance tendencies. Secondly, we explored whether mindful-attention meditation could modulate automatic semantic expectations in a modified storytelling paradigm. We used a neurophenomenological approach, combining molecular, physiological, electroencephalographic (EEG) and behavioral data, with first-person data collected using self-reports and qualitative interviews.Overall, behavioral, physiological and EEG results supported our hypothesis that derealization can prompt des-automatization of cognitive bias. Neurophenomenological accounts indicate that participants used different cognitive strategies to achieve dereification, and that such strategies vary as a function of meditation expertise, among others. Naïve participants use more often cognitive reappraisal/emotional regulation-type strategies, which are reflected in the modulation of late ERP components. In contrast, meditators used less often elaborative strategies as reflected by the modulation of early sensory ERPs

肢體動作是情緒表達的方式之一，本研究旨在探討表達情緒時，表達者「動作特性」及「身體方向」對肢體動作情緒表達的影響，及其二者的關係。參考過去研究，本研究使用生氣、害怕、開心及悲傷四種情緒的肢體動作，並操弄平滑度、僵硬度、速度、力道及擴張度五種動作特性；0°、45°、90°三種身體方向，並且以正確率、反應時間及情緒強度作為指標，進行區辨作業及評分作業。本研究共分兩個實驗，每個實驗皆由兩個子實驗構成，兩個子實驗分別使用「一般動作」及「特殊動作」作為呈現刺激。實驗一目的在於探討「動作特性」對情緒表達的影響；實驗二目的在於探討「動作特性」和「身體方向」共同對情緒表達的影響。實驗一A使用一般動作並操弄五種動作特性，藉此得到各情緒的動作特性組合；實驗一B使用特殊動作並操弄動作特性相容性，結果顯示動作特性相容性確實有其效果，相容情況的情緒強度高於不相容情況。實驗二A、二B分別使用一般動作及特殊動作，並操弄五種動作特性及三種身體方向，結果顯示當身體方向符合情緒的趨避動機時，其正確率、反應時間及情緒強度的表現皆較好。综合而言，「動作特性」及「身體方向」在肢體動作表達情緒時確實有其效果，當動作特性相容時，可增進情緒表達力；當身體方向符合該情緒的趨避動機時，也可增進情緒表達力，但動作特性及身體方向二者間的關係為何，本研究仍無法下一定論。 關鍵字：情緒表達、趨避動機、肢體動作、動作特性、身體方向 / Abstract Body movement is one of the ways to express emotion. The purpose of this study is to explore the effects of movement quality and body direction on the emotion expressiveness of body movement. Referring to some previous studies, four kinds of emotion (anger, fear, happiness and sadness) were included in the present study. Five movement qualities (smoothness, stiffness, speed, strength and expansion) and three body directions (0°, 45° and 90°) were manipulated as the independent variables. Response accuracy and reaction times of an identification task and rating scores of the emotion rating task were measured as the dependent variables. There are two experiments in this study which includes two sub-experiments each. One of the sub-experiments adopted non-propositional body movements as stimuli (Experiment 1A & 2A), and the other adopted propositional body movements as stimuli (Experiment 1B & 2B). Experiment 1 aimed to explore the effect of movement qualities. In Experiment 1A, movement quality combinations which can express each of the four emotions were found. Based on this result, in Experiment 1B, movement quality compatibility was manipulated. The results of Experiment 1B confirmed the effect of movement quality compatibility on emotion strength in non-propositional body movement. Experiment 2 manipulated five movement qualities and three body directions. The results showed that when body direction was compatible with the approach-avoidance motivation of the expressed emotion, participant’s performances on response accuracy, reaction times and rating scores were better than that of incompatible ones. In conclusion, both movement quality and body direction can influence the emotion expressiveness of body movement. When movement qualities and body directions are compatible with the expressed emotion, the strength of emotion can be increased. But the relative contributions and the interaction effect of movement qualities and body directions are still unclear. Keywords: emotion expression, approach-avoidance motivation, body movement, movement quality, body direction