Affect Induction Procedures Research Articles

Examining demand effects on direct and indirect affect measures in affect induction procedures.

Affect induction procedures are effectively implemented in psychological research. However, because participants are typically asked to self-report their affect immediately after viewing emotional stimuli, the goal of eliciting affect is relatively easy for participants to infer, making their responses susceptible to demand effects. To examine this demand effect, research has used an unrelated-studies paradigm, in which participants are led to believe that they are participating in two different, unrelated studies. While this paradigm has been used in some studies using affect induction procedures, none have examined the extent of demand effects in affect induction procedures. To do so, we conducted six online experiments (N = 170, N = 254, N = 664, N = 260, N = 239, N = 249) by contrasting an unrelated- with a related-studies design. The participants in the related-studies condition were to believe that the affect measurement after the induction belonged to the same pretest as the affect induction, whereas the participants in the unrelated-studies condition were to believe that this measurement was part of a second, unrelated pretest. We found that a related- versus unrelated-studies design produced a significant demand effect for both positive and negative affect, as indicated by greater increases in positive and negative affect in the related-studies compared with the unrelated-studies condition. Demand effects were also found on some indirect measures of affect, as reflected by a significantly smaller self-reported momentary thought-action repertoire, but not by worse memory performance or more distrust in the related-studies condition. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Transcutaneous auricular vagus nerve stimulation to acutely reduce emotional vulnerability and improve emotional regulation in borderline personality disorder (tVNS-BPD): study protocol for a randomized, single-blind, sham-controlled trial

BackgroundBorderline personality disorder (BPD) is considered a disorder of emotion regulation resulting from the expression of a biologically determined emotional vulnerability (that is, heightened sensitivity to emotion, increased emotional intensity/reactivity, and a slow return to emotional baseline) combined with exposure to invalidating environments. Vagal tone has been associated with activity in cortical regions involved in emotion regulation and a lower resting state of vagal tone has been observed in BPD patients relative to healthy controls. Non-invasive transcutaneous auricular vagus nerve stimulation (taVNS) has been shown to reduce temper outbursts in adults with Prader-Willi Syndrome, to enhance recognition of emotions in healthy students, and to improve depressive and anxiety symptoms. Furthermore, a single session of taVNS has been shown to acutely alter the recognition of facial expressions of negative valence in adolescents with MDD and increase emotion recognition in controls. However, the effect of taVNS on emotional vulnerability and regulation in individuals diagnosed with BPD has not been investigated. Our aims are to determine if taVNS is effective in acutely reducing emotional vulnerability and improve emotional regulation in BPD patients.MethodsForty-two patients will be randomized to a single session of taVNS or sham-taVNS while going through an affect induction procedure. It will consist of the presentation of one neutral and three negative affect-evoking 4-min-long videos in sequence, each of which is followed by a 4-min post-induction period during which participants will rate the quality and intensity of their current self-reported emotions (post-induction ratings) and the perceived effectiveness in managing their emotions during the video presentation. The rating of the current self-reported emotions will be repeated after every post-induction period (recovery ratings). Mixed models with individuals as random effect will be used to investigate the ratings at each stage of the study, taking into account the repeated measures of the same individuals at baseline, pre-induction, post-induction, and recovery.DiscussionThe study has potential to yield new insights into the role of vagal tone in emotion dysregulation in BPD and offer preliminary data on the effectiveness of taVNS as a possible non-invasive brain stimulation to treat a core symptom of BPD.Trial registrationClinicalTrials.gov NCT05892900. Retrospectively registered on Jun 07, 2023.

Exploring effects of response biases in affect induction procedures.

This study examined whether self-reports or ratings of experienced affect, often used as manipulation checks on the efficacy of affect induction procedures (AIPs), reflect genuine changes in affective states rather than response biases arising from demand characteristics or social desirability effects. In a between-participants design, participants were exposed to positive, negative and neutral images with valence-congruent music or sound to induce happy, sad and neutral mood. Half of the participants had to actively appraise each image whereas the other half viewed images passively. We hypothesised that if ratings of affective valence are subject to response biases then they should reflect the target mood in the same way for active appraisal and passive exposure as participants encountered the same affective stimuli in both conditions. We also tested whether the AIP resulted in mood-congruent changes in facial expressions analysed by FaceReader to see whether behavioural indicators corroborate the self-reports. The results showed that while participants' ratings reflected the induced target valence, the difference between positive and negative AIP was significantly attenuated in the active appraisal condition, suggesting that self-reports of mood experienced after the AIP are not entirely a reflection of response biases. However, there were no effects of the AIP on FaceReader valence scores, in line with theories questioning the existence of cross-culturally and inter-individually universal behavioural indicators of affective states. Efficacy of AIPs is therefore best checked using self-reports.

An experimental investigation of the affect regulating properties of sugar consumption: Examining the roles of socially-oriented positive and negative affect

Obesity is a major public health concern, and sugar consumption is a key risk factor for obesity. Thus, there is a need to identify factors that may increase motivation to consume sugar. One such factor may be negative affect, as research has shown that negative affect increases motivation for and engagement in appetitive behaviors, including sugar consumption. The goal of the present study was to extend past research on the role of negative affect in sugar consumption by examining: (a) the effect of a socially-oriented negative affect induction (i.e., social rejection) on the consumption of flavored beverages with varying levels of sugar, and (b) the negative and positive affect regulating properties of varying levels of sugar consumption. Undergraduate students (N = 116) were randomized to receive either a neutral or socially-oriented negative affect induction. Participants were then presented with three flavored beverages with varying levels of sugar (low, medium, high). Negative and positive affect were assessed prior to and following the affect induction procedure, as well as following consumption of the beverage. Participants exposed to the negative affect induction consumed a larger volume of the high sugar beverage (as well as a larger volume of all sugary beverages) relative to participants in the neutral induction condition. Moreover, these findings could not be attributed to a greater preference for the high sugar beverage among participants in the negative affect condition. Additionally, lower levels of positive affect post-induction across all participants (regardless of condition) were associated with greater consumption of the high sugar beverage, and high sugar beverage consumption was significantly positively associated with post-consumption positive affect. Results provide evidence for an affect-regulating function of sugar consumption following social rejection.

Positive affect and pro-environmental behavior: A preregistered experiment

Abstract In recent years, correlational evidence has accumulated in support of a positive relationship between positive affect and pro-environmental behavior. In contrast, it remains unclear whether the induction of positive affect can causally promote pro-environmental behavior. Previous attempts to examine the effects of experimental affect induction were constrained by the difficulty to study pro-environmental behavior under controlled laboratory conditions. Here, we address this limitation by examining the effect of a validated affect-induction procedure on a recently validated laboratory measure of pro-environmental behavior. Participants in our preregistered experiment (N = 178) watched and rated video clips pretested to induce either positive or neutral affect before completing 24 trials on the Pro-Environmental Behavior Task (PEBT). Results did not reveal any evidence in support of a positive effect of positive affect on PEBT behavior. This result illustrates the need for further systematic and cumulative research on the complex relationship between affect and pro-environmental behavior.

The manipulation of affect: A meta-analysis of affect induction procedures.

Affect inductions have become essential for testing theories of affect and for conducting experimental research on the effects of mood and emotion. The current review takes stock of the vast body of existing literature on affect induction procedures (AIPs; also referred to as mood inductions) to evaluate the effectiveness of affect inductions as research tools and to test theories of affect (e.g., the bipolarity hypothesis, negativity bias, positivity offset, and theories of emotionality and gender) using meta-analytic data. In doing so, we seek to address whether AIPs are effective for inducing affective states, what conditions maximize their effectiveness, for which emotions they are most effective, for whom they are most effective, and whether affect induction findings can provide insight into theories of affect. A meta-analysis of 874 samples and 53,509 participants suggests that affect inductions are effective on average (δ = 1.32), but this effectiveness varies with the type of affect induction, the emotion being induced, and the gender of the participants. Further, results indicate coupled activation where the induction of positive (negative) emotions leads to a corresponding reduction in negative (positive) emotions, which provides support for the bipolar continuum of positive and negative affect. Results also revealed a negativity bias in which individuals display stronger reactions to negative stimuli than positive stimuli. A practical guide in the choice of affect induction procedures for researchers is presented and implications for emotion theory are discussed. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Supplemental Material for The Manipulation of Affect: A Meta-Analysis of Affect Induction Procedures

Supplemental Material for The Manipulation of Affect: A Meta-Analysis of Affect Induction Procedures

The relationships between worry, happiness and pain catastrophizing in the experience of acute pain

The current study aimed to (a) evaluate the effects of an experimental manipulation of worry and happiness on pain perception and measures of worry about pain and pain catastrophizing and (b) determine if changes in situation-specific worry about pain and pain catastrophizing would be related to changes in acute pain. The study included 120 healthy, pain-free volunteers. Participants were exposed to four levels of noxious stimulation and asked to report on the pain intensity, worry about pain and pain catastrophizing they experienced during the stimulation procedures. They were then randomly assigned to either a Happy or a Worry condition, where they were exposed to emotion induction procedures. The noxious exposure procedures and measures of pain, pain-related worry and pain catastrophizing were then repeated. Participants in the Worry condition reported significant increases in pain intensity, and those in the Happy condition reported significant decreases in pain intensity. Further, the Worry condition participants reported significant increases in both pain-related worry and pain catastrophizing, while the Happy condition showed the opposite effects. Finally, changes in worry about pain and pain catastrophizing were found to mediate the impact of the affect induction procedure on pain intensity. The findings demonstrate that pain intensity, worry about pain and pain catastrophizing are all sensitive to changes in mood. The results have potential clinical implications. The current study shows that manipulation-induced changes in pain-related worry, pain catastrophizing, and affect have direct effects on the experience of acute pain. More broadly, the overlap of these three variables provides with anxiety and mood disorders offers the promise of new vistas for research and treatment of pain conditions by assessing and targeting the cognitions and behaviors that are common to worry and catastrophizing.

Utilizing Neutral Affective States in Research: Theory, Assessment, and Recommendations

Even though researchers regularly use neutral affect induction procedures (AIPs) as a control condition in their work, there is little consensus on what is neutral affect. This article reviews five approaches that researchers have used to operationalize neutral AIPs: to produce a(n) (a) minimal affective state, (b) in-the-middle state, (c) deactivated state, (d) typical state, or (e) indifferent state. For each view, the article delineates the theoretical basis for the neutral AIP, how to assess it, and provides recommendations for when and how to use it. The goal of the article is to encourage researchers to state their theoretical assumptions about neutral affect, to validate those assumptions, and to make appropriate conclusions based on them.

Effectiveness of internet-based affect induction procedures: A systematic review and meta-analysis.

Procedures used to induce affect in a laboratory are effective and well-validated. Given recent methodological and technological advances in Internet research, it is important to determine whether affect can be effectively induced using Internet methodology. We conducted a meta-analysis and systematic review of prior research that has used Internet-based affect induction procedures, and examined potential moderators of the effectiveness of affect induction procedures. Twenty-six studies were included in final analyses, with 89 independent effect sizes. Affect induction procedures effectively induced general positive affect, general negative affect, fear, disgust, anger, sadness, and guilt, but did not significantly induce happiness. Contamination of other nontarget affect did not appear to be a major concern. Video inductions resulted in greater effect sizes. Overall, results indicate that affect can be effectively induced in Internet studies, suggesting an important venue for the acceleration of affective science. (PsycINFO Database Record

Supplemental Material for Effectiveness of Internet-Based Affect Induction Procedures: A Systematic Review and Meta-Analysis

Supplemental Material for Effectiveness of Internet-Based Affect Induction Procedures: A Systematic Review and Meta-Analysis

How does this make you feel? A comparison of four affect induction procedures.

Affect is a fundamental aspect of the human mind. An increasing number of experiments attempt to examine the influence of affect on other psychological phenomena. To accomplish this research, it is necessary to experimentally modify participants' affective states. In the present experiment, we compared the efficacy of four commonly used affect induction procedures. Participants (38 healthy undergraduate students: 18 males) were randomly assigned to either a pleasant or an unpleasant affect induction group, and then underwent four different affect induction procedures: (1) recall of an affectively salient event accompanied by affectively congruent music, (2) script-driven guided imagery, (3) viewing images while listening to affectively congruent music, and (4) posing affective facial actions, body postures, and vocal expressions. All four affect induction methods were successful in inducing both pleasant and unpleasant affective states. The viewing image with music and recall with music procedures were most effective in enhancing positive affect, whereas the viewing image with music procedure was most effective in enhancing negative affect. Implications for the scientific study of affect are discussed.

The influence of positive affect on jumping to conclusions in delusional thinking

This study examined relationships between positive affect and jumping to conclusions (JTC) in delusional thinking. One hundred and eighty-nine non-clinical participants entered an internet experiment and were randomized into one of two conditions. Those in a positive condition performed online creativity tasks and received bogus positive feedback as part of a positive affect induction procedure, whilst a neutral condition received neutral feedback. Both groups were subsequently assessed on a survey task for changes in JTC. In line with hypotheses, participants in the positive condition requested significantly more survey comments before drawing conclusions than those in the neutral condition. Results suggest that increases in positive affect may be linked with a tendency to gather more information before making decisions (i.e. a reduction in JTC). The influence of positive affect on reasoning biases in social environments is discussed.

Constructing Emotion

This study examined the hypothesis that emotion is a psychological event constructed from the more basic elements of core affect and conceptual knowledge. Participants were primed with conceptual knowledge of fear, conceptual knowledge of anger, or a neutral prime and then proceeded through an affect-induction procedure designed to induce unpleasant, high-arousal affect or a neutral affective state. As predicted, only those individuals for whom conceptual knowledge of fear had been primed experienced unpleasant core affect as evidence that the world was threatening. This study provides the first experimental support for the hypothesis that people experience world-focused emotion when they conceptualize their core affective state using accessible knowledge about emotion.

Attachment style and the regulation of negative affect: exploring individual differences in mood congruency effects on memory and judgment.

Three studies examined the role that attachment style plays in moderating the effects of induced negative affect on memory and judgment. Israeli undergraduates completed an attachment style scale and were exposed to a negative or neutral affect induction. In Study 1, incidental recall of negative and positive information was assessed; in Study 2, the attribution of negative and positive relational events was studied; and in Study 3, findings of Study 1 were replicated using a different affect induction procedure. Whereas securely attached persons reacted to induced negative affect with an affect-incongruent pattern of cognitions (better recall of positive information, more unstable/specific attribution of negative event), anxiously attached persons reacted with an affect-congruent pattern (worse recall of positive information, more stable/global attribution of negative event). Persons scoring high on attachment avoidance showed no significant cognitive effect of negative affect. The discussion emphasizes the role that attachment strategies play in the affect-cognition link.

Effects of Affect, Stereotype Consistency, and Valence of Behavior on Causal Attributions

The authors examined 3 hypotheses about the effects of 2 positive and 2 negative affects on causal attributions. On the basis of cognitive appraisal theories of emotion, they predicted that the grateful and angry participants would attribute causality for like-valenced behaviors to the target more strongly than would the happy and sad participants, respectively. Following an affect-induction procedure, 229 Anglo-American participants read a description of an African American target whose behavior was stereotype consistent or stereotype inconsistent and positive or negative in valence. As predicted, when the behavior was negative, the angry participants attributed it more strongly to the target than did the sad participants. When the behavior was positive, the grateful participants attributed it more strongly to the target than did the happy participants. The importance of distinguishing among affects and considering their multidimensional nature in predicting effects on social judgments is emphasized.

Children's emotions as organizers of their reactions to interadult anger: A functionalist perspective.

Children's emotions have been implicated as mediating their responses to interadult anger, but this proposition has not been directly tested. Sixty-four 4-8-year-olds (32 boys and 32 girls) were induced to feel angry, sad, happy, or just okay before their exposure to interadult anger. Data were analyzed by means of (a) analyses of variance testing differences across conditions and (b) correlations between children's emotions during affect induction procedures and their reactions to interadult anger. Findings indicated that negative emotions increased children's distress and negative appraisals and expectations in reaction to interadult anger, whereas positive emotions reduced distress reactions and increased children's positive expectations about future interadult interactions. The results support a functionalist view that emotions can play a causal role in organizing and directing children's reactions to events and are consistent with research and theory highlighting the role of emotionality in children's coping with marital conflict. Although marital conflict has been repeatedly associated with children's adjustment problems (Grych & Fincham, 1990), the processes through which marital conflict affects children, and how children organize their responses, are little understood (Emery, 1982). The paucity of theory and research about process is a significant gap in the field. Both Grych and Fincham (1990) and Davies and Cummings (1994) have proposed that intraindividual factors, including cognitive processes (Cummings, Davies, & Simpson, 1994; Fincham, Grych, & Osborne, 1994; Grych & Fincham, 1993) and emotional states, interact with the characteristics of marital conflict to shape its impact. However, despite the salience of children's negative emotionality in their reactions to marital conflict in the home (e.g., Cummings, Zahn-Waxier, & RadkeYarrow, 1981, 1984) and to experimental analogues of marital conflict (e.g., Cummings, 1987), there have been no direct tests of the role of emotions. Furthermore, one can make a case for the primacy of children's emotional states in their reactions to marital conflict. For example, based on a consideration of field and experimental research, Emery (1989) proposed that children's distress motivates their behavioral and instrumental reactions to marital conflict. A three-component model was hypothesized: (a) Marital conflict is an aversive event that produces distress in children, (b) children react emotionally or instrumental^ to reduce the distress, and (c) actions that reduce the conflict are maintained because of the function they serve for the family and the child. The significance of emotions in organizing and directing responses to interpersonal events is consistent with more general

Children's emotions and memory for affective narrative content

The present study was an investigation of effects of emotional states on children's learning and memory for a short narrative. Happy, sad, or neutral moods were induced in 72 second-grade boys and girls by a standard affect induction procedure. This mood induction was accomplished either before or after they heard a story in which two protagonists encountered a variety of experiences having an affective character. For half of the subjects, the initial story event had a positive affective valence, and for half it was negative. Children's memory for events in the narrative was assessed immediately afterward, using measures offo free recall, cued recall, and recognition. Children recalled more affective content than neutral content, and boys recalled more than girls. Valence of the initial story item and sex of subject influenced the relationship between mood state and memory for story events. Under some conditions, positive moods reduced recognition accuracy for positive material. The findings suggest that simple patterns of mood-influenced memory found in previous studies are modified by factors such as characteristics of the learner and the organization of the material to be learned. The relationship between mood and memory thus appears to be more complex than previously recognized.

Some Specific Effects of Four Affect-Induction Procedures

This study examines some specific effects of the Positive and Negative Velten Mood Induction Procedures and of two motion pictures selected for their affect inducing qualities. Results revealed that, despite apparently strong effects on affective state when measured immediately after affect induction, the Velten Statements and one of the films had no discernible effect when measured after a brief, neutral, intervening task. The other film, in contrast, appeared to influence affective state not only when tested immediately, but even after the intervening task. These results were interpreted as shedding additional light on the affect inductions studied, suggesting limitations of some of the techniques, and indicating that induced affect may be measured relatively specifically.