Daniel Västfjäll

Numeracy and Decision Making

A series of four studies explored how the ability to comprehend and transform probability numbers relates to performance on judgment and decision tasks. On the surface, the tasks in the four studies appear to be widely different; at a conceptual level, however, they all involve processing numbers and the potential to show an influence of affect. Findings were consistent with highly numerate individuals being more likely to retrieve and use appropriate numerical principles, thus making themselves less susceptible to framing effects, compared with less numerate individuals. In addition, the highly numerate tended to draw different (generally stronger or more precise) affective meaning from numbers and numerical comparisons, and their affective responses were more precise. Although generally helpful, this tendency may sometimes lead to worse decisions. The less numerate were influenced more by competing, irrelevant affective considerations. Analyses showed that the effect of numeracy was not due to general intelligence. Numerical ability appears to matter to judgments and decisions in important ways.

Adult Age Differences in Dual Information Processes Implications for the Role of Affective and Deliberative Processes in Older Adults' Decision Making

Age differences in affective/experiential and deliberative processes have important theoretical implications for judgment and decision theory and important pragmatic implications for older-adult decision making. Age-related declines in the efficiency of deliberative processes predict poorer-quality decisions as we age. However, age-related adaptive processes, including motivated selectivity in the use of deliberative capacity, an increased focus on emotional goals, and greater experience, predict better or worse decisions for older adults depending on the situation. The aim of the current review is to examine adult age differences in affective and deliberative information processes in order to understand their potential impact on judgments and decisions. We review evidence for the role of these dual processes in judgment and decision making and then review two representative life-span perspectives (based on aging-related changes to cognitive or motivational processes) on the interplay between these processes. We present relevant predictions for older-adult decisions and make note of contradictions and gaps that currently exist in the literature. Finally, we review the sparse evidence about age differences in decision making and how theories and findings regarding dual processes could be applied to decision theory and decision aiding. In particular, we focus on prospect theory (Kahneman & Tversky, 1979) and how prospect theory and theories regarding age differences in information processing can inform one another.

Bringing Meaning to Numbers: The Impact of Evaluative Categories on Decisions.

Decision makers are often quite poor at using numeric information in decisions. The results of 4 experiments demonstrate that a manipulation of evaluative meaning (i.e., the extent to which an attribute can be mapped onto a good/bad scale; this manipulation is accomplished through the addition of visual boundary lines and evaluative labels to a graphical format) has a robust influence in health judgments and choices and across diverse adult populations. The manipulation resulted in greater use of numeric quality-of-care information in judgments and less reliance on an irrelevant affective state among the less numerate. Recall results for provided quality-of-care numbers suggested that the manipulation did not influence depth of number processing with the exception of cost information that was not remembered as well. Results of a reaction-time paradigm revealed that feelings were more accessible than thoughts in the presence of the manipulation, suggesting that the effect may be due, at least in part, to an affective mechanism. Numeric information is often provided in decisions, but may not be usable by consumers without assistance from information providers. Implications for consumer decision making and the functions of affect are discussed.

Emotion Induction through Music: A Review of the Musical Mood Induction Procedure

This article reviews research showing that music can alter peoples’ moods and emotions. The so called “musical mood induction procedure” (MMIP) relies on music to produce changes in experienced affective processes. The fact that music can have this effect on subjective experience has been utilized to study the effect of mood on cognitive processes and behavior by a large number of researchers in social, clinical, and personality psychology. This extensive body of literature, while little known among music psychologists, is likely to further help music psychologists understand affective responses to music. With this in mind, the present article aims at providing an extensive review of the methodology behind a number of studies using the MMIP. The effectiveness of music as a mood-inducing stimulus is discussed in terms of self-reports, physiological, and behavioral indices. The discussion focuses on how findings from the MMIP literature may extend into current research and debate on the complex interplay of music and emotional responses.

Intuition and cooperation reconsidered

Arising from D. G. Rand, J. D. Greene & M. A. Nowak 489, 427–430 (2012)10.1038/nature11467Rand et al. reported increased cooperation in social dilemmas after forcing individuals to decide quickly. Time pressure was used to induce intuitive decisions, and they concluded that intuition promotes cooperation. We test the robustness of this finding in a series of five experiments involving about 2,500 subjects in three countries. None of the experiments confirms the Rand et al. finding, indicating that their result was an artefact of excluding the about 50% of subjects who failed to respond on time.

The measurement of core affect: A Swedish self-report measure derived from the affect circumplex.

Three studies were conducted with the aim of developing a new Swedish self-report measure of core affect (the Swedish Core Affect Scale or SCAS). In Study 1,122 participants rated their current mood on 24 unipolar adjective scales. A revised set of 12 bipolar adjective scales was evaluated in Study 2 employing 96 participants who rated their current mood before and after a mood-inducing naturally occurring event. A slightly revised set of adjective scales was used in Study 3, in which another 96 participants rated several induced moods. The results showed that the adjective scale ratings could be aggregated as reliable measures of the independent valence and activation dimensions proposed in the affect circumplex, and that the aggregated measures discriminated mood differences within and between individuals.

Emotional reactions to music in a nationally representative sample of Swedish adults: Prevalence and causal influences

Empirical studies have indicated that listeners value music primarily for its ability to arouse emotions. Yet little is known about which emotions listeners normally experience when listening to music, or about the causes of these emotions. The goal of this study was therefore to explore the prevalence of emotional reactions to music in everyday life and how this is influenced by various factors in the listener, the music, and the situation. A self-administered mail questionnaire was sent to a random and nationally representative sample of 1,500 Swedish citizens between the ages of 18 and 65, and 762 participants (51%) responded to the questionnaire. Thirty-two items explored both musical emotions in general (semantic estimates) and the most recent emotion episode featuring music for each participant (episodic estimates). The results revealed several variables (e.g., personality, age, gender, listener activity) that were correlated with particular emotions. A multiple discriminant analysis indicated that three of the most common emotion categories in a set of musical episodes (i.e., happiness, sadness, nostalgia) could be predicted with a mean accuracy of 70% correct based on data obtained from the questionnaire. The results may inform theorizing about musical emotions and guide the selection of causal variables for manipulation in future experiments.

The Subjective Sense of Presence, Emotion Recognition, and Experienced Emotions in Auditory Virtual Environments

Realistic aural rendering of events in mediated environments is becoming an increasingly important aspect in many multi-modal applications. In a between-group experiment with 45 participants, it was studied how ratings of presence (a sense of being in the mediated environment), emotional reactions to the auditory environment, and emotion recognition vary as a function of number of audio channels (mono, stereo, and six-channel reproduction). The results showed that stereo and six-channel reproduction resulted in significantly stronger changes in emotional reactions than the mono condition. Further, six-channel reproduction received the highest ratings of presence and emotional realism. Taken together, the result suggested that both emotional reactions and ratings of presence increase with spatialized sound. Further, emotional reactions and presence were highly correlated. The results are discussed in relation to theories of mediated presence and emotional reactions in an attempt to further delineate the concept of presence.

Experimental evidence of the roles of music choice, social context, and listener personality in emotional reactions to music

Music may arouse intense emotions in listeners, but little is known about the circumstances that contribute to such reactions. Here we report a listening experiment that investigated the roles of selected musical, situational, and individual factors in emotional reactions to music. In a 2 × 2 factorial design, we manipulated music choice (self-chosen vs. randomly sampled) and social context (alone vs. with a close friend or partner). Fifty university students (20–43 years old) rated their emotional responses to the music in terms of overall emotion intensity and 15 emotions. We also measured personality traits (NEO-PI-R) and psychophysiological responses (skin conductance, heart rate). Consistent with predictions based on previous field studies, listeners reported more intense emotions (1) to self-chosen music than to randomly selected music and (2) when listening with a close friend or partner than when listening alone. Moreover, listeners scoring high on the trait Openness to experience experienced more intense emotions than listeners scoring low. All three factors correlated positively with the experience of positive emotions such as happiness and pleasure.

Embodied auditory perception: The emotional impact of approaching and receding sound sources.

Research has shown the existence of perceptual and neural bias toward sounds perceived as sources approaching versus receding a listener. It has been suggested that a greater biological salience of approaching auditory sources may account for these effects. In addition, these effects may hold only for those sources critical for our survival. In the present study, we bring support to these hypotheses by quantifying the emotional responses to different sounds with changing intensity patterns. In 2 experiments, participants were exposed to artificial and natural sounds simulating approaching or receding sources. The auditory-induced emotional effect was reflected in the performance of participants in an emotion-related behavioral task, their self-reported emotional experience, and their physiology (electrodermal activity and facial electromyography). The results of this study suggest that approaching unpleasant sound sources evoke more intense emotional responses in listeners than receding ones, whereas such an effect of perceived sound motion does not exist for pleasant or neutral sound sources. The emotional significance attributed to the sound source itself, the loudness of the sound, and loudness change duration seem to be relevant factors in this disparity.