Mood state-dependent memory: A meta-analysis

Abstract

Published research (from 1975 to 1985) on mood state-dependent memory is examined with meta-analytical techniques. Research on mood-congruent memory is also examined when relevant to a mood state-dependent hypothesis. Effect sizes are shown to vary systematically as a function of several variables. Mood state-dependent memory is more often observed with positive rather then negative moods. Also, the strongest effects were found in studies that: (a) used real-life events as the material to be retrieved; (b) selected contrasting moods, i.e. positive vs. negative rather than simply positive or negative vs. neutral moods; (c) used mood states that were specific to the items; (d) lasted longer; (e) had smaller sample size; (f) selected subjects according to direct mood criteria; (g) paid subjects for their participation in the experiment; and (h) used adults rather than students or children. Present findings are consistent with other reviews and with common theories of mood state-dependent memory. However, the findings also highlight the importance of methodological variables, more particularly variables related to the degree of commitment of subjects to the experiment, and variables related to the nature and complexity of the experimental environment. Two dimensions, realism of the experiment and demand sensitivity, compete to account for the methodological results and for some of the theoretical results.     

Depression,restraint and eating behavior

Contrary to the belief that weight loss is a principal symptom of depression, several recent studies have suggested that certain people gain rather than lose weight when depressed. The present experiment concerned the effects of experimentally induced mood states on the eating behavior of high- and low-restraint persons. Sixty-eight female undergraduates were randomly assigned to one of three groups each designed to induce a different mood state (depressed, neutral or elated), and were classified as high or low restraint based on their responses to a questionnaire. During the mood induction procedure subjects were provided with the opportunity to eat. High-restraint persons induced into a depressed mood ate significantly more than high-restraint persons induced into neutral or elated moods, and more than low-restraint persons induced into a depressed mood. This effect was most prominent among subjects who scored high on the weight-fluctuation factor of the restraint scale. There was no evidence that this effect occurred among subjects who scored high on the concern for dieting factor. The role of emotional arousal on the self-control over eating behavior of high weight-fluctuation persons, and the implications of these findings for the evaluation of depression were discussed.     

Unilateral Facial Contractions Produce Mood Effects on Social Cognitive Judgements

Abstract

This study demonstrates that left and right unilateral facial contractions have similar effects on the expression of ethnic stereotypes as do negative and positive moods induced by more conventional means. Subjects who con tracted the left side of their face (negative mood inducer) were more likely to express negative stereotypes of ethnic groups than were subjects who contracted the right side of their face (positive mood inducer). This parallels previous findings obtained using two standard mood inductions: the Veltens mood induction procedure; and a musical mood induction procedure. Given that unilateral facial contractions manipulate mood without cognitive involvement, this mood induction may have advantages over previously used procedures, the effects of which are subject to cognitive mediation explanations. In addition, these results suggest that, at least for the expression of ethnic stereotypes, mood's influence on cognition does not depend on a cognitive component of mood induction.     

Mood-dependent memory for generated and repeated words: Replication and extension

Abstract

Mood-dependent memory (MDM) has been difficult to demonstrate, but Eich and Metcalfe (1989) reported a strong effect with music-induced moods and learning of self-generated responses. Bower and Mayer (1989), however, could not obtain the MDM effect with self-generated responses. The present experiment attempted to replicate Eich and Metcalfe, but induced positive and negative moods with self-referent statements rather than music. Sixty-four subjects (32 males, 32 females) were randomly assigned in equal numbers to one of four mood conditions, same or opposite mood at learning and testing. At learning, immediately following mood induction subjects (Ss) generated 16 response words and 16 repeated words. Forty-eight hours later, Ss were given recall and recognition tests. For recall, there was a significant learn mood by test mood interaction (P < 0.0001), with greater recall for generated than repeated words (P < 0.0001). The interaction for repeated words approached significance (P = 0.07). For recognition memory, the learn by test mood interaction was also significant (P = 0.03), with a significant interaction (P = 0.02) for repeated words, but not for generated words (P = 0.23). An analysis of the Eich and Metcalfe data and ours suggests that the generation procedure only produced better memory overall and that under some conditions (but not all) this level of memory was optimal for demonstrating MDM.     

Mood in foreign exchange trading: Cognitive processes and performance

This paper examines the effects of mood on the behavior of traders or decision makers in financial markets. Based on a review of the psychological theories and empirical findings which relate mood to decision making and information processing, we derive hypotheses with respect to the impact of good, neutral, and bad moods on the behavior of traders. Two experiments (N=66 and 72) were conducted on an Internet platform which simulated foreign exchange trading based on historical market data. The first experiment manipulated mood using feedback and music whereas the second one asked subjects to read mood-laden statements. It was found that traders in a good mood had an inferior trading performance (losing money) compared to those in a neutral or bad mood (making profit). This is because traders in a good mood made less accurate decisions than those in neutral or bad moods. Those in a bad mood were the most accurate in their decisions but behaved conservatively in their trading. Subjects in a good mood tended to make less accurate decisions though they spent on average at least the same time as the other subjects on information processing and decision-making. They also were over-confident taking unwarranted risks. The studies concluded with insights concerning the effects of mood on choice of trading strategies.     

Equity and Affect: The Effects of Relative Performance and Moods on Resource Allocation

This investigation examined the interactive effects of moods and performance on allocations of reward. Ninety-seven undergraduate students were randomly assigned to six treatment conditions. Mood (happy, neutral, sad) and relative performance (better than competitor, worse than competitor) were factorially combined to produce a 2 x 3 design. It was hypothesized that results consistent with equity theory (performance main effect) and mood research (main effect for mood with happy subjects acting selfishly and sad subjects behaving generously) would be found. Following the inductions, subjects divided 100 raffle tickets between themselves and their competitors. As expected, main effects for mood and performance reached or approached conventional levels of significance. However, these findings were qualified by a significant interaction between mood and performance. In general, moods affected allocations for worse performers but not for better performers. These findings are discussed in terms of the effects moods are believed to have on attentional focus, which is thought to mediate subsequent allocations.     

The perception of emotionally toned sentences by right hemisphere-damaged and aphasic subjects

The perception of 60 emotionally toned sentences, divided into meaningful and meaningless utterances, by high- and low-verbal aphasics and right hemisphere-damaged subjects who were not aphasic was investigated. The intended moods were happiness, sadness, and anger. Results indicated (a) significant differences between the aphasic groups in identifying the intended emotion but none between groups in identifying the intended emotion but none between either of these groups and the right hemispheric dysfunction subjects; (b) sentence meaningfulness only affected the responses of high-verbal aphasics; and (c) while the happy mood seemed to be the least frequently selected among the three moods, closer inspection indicated that the subjects in absence of response bias were distinguishing among the three moods with equal success.     

The effect of mood and incentives on helping: Are there some things money can't buy?

Happy, guilty, and neutral mood states were induced in participants who were then provided with an opportunity to donate blood for free, to donate in exchange for $5, or to choose between donating for free or for $5. As expected, there was a significantly higher incidence of helping when subjects felt happy and guilty as opposed to emotively neutral. Contrary to predictions, helping was unaffected by the type of incentive (donate for $5, donate for free, choose $5/free) subjects were offered in interaction with their mood state. However, the type of incentive did seem to influence the postdonation emotions of subjects: Guilty subjects who donated for money felt significantly less guilty following donation than prior to it and happy subjects felt more self-altruistic (kind and generous) following donation when they helped for free. The results are discussed in terms of Cialdini's negative state relief model (for negative moods) and the intrinsic qualities of helping (for positive moods).     

情绪对提取诱发遗忘的影响

从学习材料的情绪性和提取过程的情绪状态两方面考察了情绪对提取诱发遗忘的影响。结果发现提取练习对情绪性与非情绪性材料引发了同等程度的遗忘;提取练习阶段,当被试处于正性或中性情绪状态下也会发生明显的提取诱发遗忘现象,而当被试处于负性情绪状态时,提取练习不会导致对未提取项目的遗忘。研究结果表明,学习材料的情绪性不影响提取诱发遗忘,而提取过程的情绪状态会对提取诱发遗忘产生影响,负性情绪状态可以消除提取诱发遗忘。     

Interactive Effects of Mood and Task Framing on Creative Generation

ABSTRACT

This study introduced a motivational compatibility account for the influence of mood on creative generation. Building upon the feelings-as-information framework, it was proposed that positive moods signal to individuals that they are safe, motivating them to take advantage of this presumed safety by seeking stimulation and incentives (i.e., having fun), whereas negative moods signal to individuals that there are problems at hand, motivating them to solve these problems. Based on these assumptions, it was predicted that positive and negative moods should enhance effort on creative generation tasks construed as compatible with the motivational orientations they respectively elicit. Specifically, positive, relative to negative, moods were predicted to enhance effort on tasks construed as fun and silly, whereas negative, relative to positive, moods were predicted to bolster effort on tasks construed as serious and important. Evidence for this model, and several of its underlying assumptions, was adduced in 3 experiments in which mood was manipulated and participants completed creative generation tasks that were framed as either fun or serious. Results are discussed with an eye toward addressing alternative theoretical explanations.     

Mood and flexibility in categorization: a conceptual replication

The present study tested the hypothesis that positive mood facilitates cognitive flexibility in categorization, i.e., positive mood enhances the ability to categorize flexibly at broad and narrow levels contingent on task requirement. The study was a conceptual replication of the 1990 work by Murray, Sujan, Hirt, and Sujan. Unlike the original study, it was carried out on the WWW with some modifications in the procedure. Participants were 29 women and 132 men whose average age was 29 yr. They were put into a positive, negative, or neutral mood using the Velten technique. Mood was measured with standard mood scales. Subjects then listed similarities differences between two entertainment TV shows. Contrary to the prediction, participants in a positive mood did not list a higher number, more diverse, or more unusual similarities and differences between the shows, and they were not faster than participants with neutral or negative moods. It is concluded that the influence of mood on cognitive flexibility needs to be reconsidered. In research, temporal aspects of categorization performance as well as a wider range of mood valences should be taken into account.     

Effects of preexisting moods on observers' reactions to helpful and nonhelpful models

Two experiments investigated the effects of preexisting mood on observers' reactions to helpful and nonhelpful models. The major predictions, derived from a social learning analysis of altruism and Isen's “cognitive loop” hypothesis, where that (1) subjects experiencing positive moods would be prosocially inclined if exposed to a helpful but not a nonhelpful model, and (2) subjects experiencing negative moods would accede to a request for assistance regardless of the type of model they had observed. Introductory psychology students underwent a positive, negative, or (in Experiment 1) a neutral mood induction. They then observed a model respond either positively or negatively to another person's request for assistance, and were subsequently provided an opportunity to assist the help-seeker. The results were highly consistent across the two experiments. The model's behavior had a stronger impact on subjects' help giving than did preexisting moods. However, internal analyses revealed that the intensity of moods that subjects were experiencing affected their reactions to modeling cues. The prosocial behavior of good mood subjects was positively correlated with the positivity of their moods if they had witnessed a helpful but not a nonhelpful model. By contrast, the helpfulness of subjects experiencing negative moods was positively correlated with the negativity of those moods, regardless of the type of model subjects had observed. The implications of these outcomes for the social learning analysis of altruism and the “cognitive loop” hypothesis are discussed.     

Are real moods required to reveal mood-congruent and mood-dependent memory?

While simulating, or acting as if, they were either happy or sad, university students recounted emotionally positive, neutral, or negative events from their personal past. Two days later, subjects were asked to freely recall the gist of all of these events, and they did so while simulating a mood that either did or did not match the one they had feigned before. By comparing the present results with those of a previous study, in which affectively realistic and subjectively convincing states of happiness and sadness had been engendered experimentally, we searched for—and found—striking differences between simulated and actual moods in their impact on autobiographical memory. In particular, it appears that the mood-congruent effects elicited by simulated moods are qualitatively different from those evoked by induced moods, and that only authentic affects have the power to produce mood-dependent effects.     

Mood and performance among defensive pessimists and strategic optimists

Results from two studies demonstrate that the effects of mood on performance depend on an individual’s strategy. In Study 1, naturally occurring positive mood was negatively related to performance for defensive pessimists (DPs), while negative mood was unrelated. For strategic optimists (SOs), neither positive nor negative mood was related to performance. In Study 2, positive or negative mood was induced prior to a set of performance measures. As predicted, DPs performed significantly better after the negative mood induction. SOs’ performance did not differ across mood conditions. Cognitive strategies and the mood as input model help to explain these results.     

Emotion and prior knowledge in memory and judged comprehension of ambiguous stories

Abstract

Two experiments investigated the effects of experimentally induced mood states on memory and judged comprehension of stories. The experiments examined the issue of whether induction of a depressed mood would affect prose memory and comprehension and impair the ability of individuals to use prior knowledge, activated by way of a title, in remembering the passage. In Experiment 1, depressed subjects who were given a title for the passage recalled fewer idea units when compared with neutral control conditions, but no depressive deficit in recall occurred in the absence of a title. In Experiment 2 the same pattern of results occurred when subjects learned two successive passages. The depressive deficits obtained were interpreted in terms of a resource allocation model which proposes that emotional states increase the production of irrelevant, competing thoughts that interfere with processes important in remembering the criterion passage. Alternative explanations involving cognitive initiative and schema theory were discussed. Finally, judgments of comprehension predicted passage recall and were better predictors for neutral than depressed mood subjects. A depressed mood state did not affect average judgments of comprehension even when recall was correspondingly impaired.     

Mood and personality: A search for the causal relationship1

Previous findings of correlations between mood and personality variables were noted. It was suggested that the establishment of a causal relationship was crucially important, not merely to the understanding of how mood is related to personality but to the conceptualization of mood as a source of error in personality measurement as well. A prior attempt to establish a causal role for mood failed, but may have done so for methodological reasons. The present study investigated the influence of a mood manipulation on personality measures. There was also an opportunity to replicate prior correlational findings independent of the effect of the mood manipulation. College students were asked to think of happy, sad, or affectively neutral events and then filled out several personality measures. A manipulation check confirmed that different moods were induced by this procedure. The prior correlations between mood and personality variables were replicated, but the mood manipulation did not affect any of the personality measures. The implications of these results for personality measurement and for the relation between mood and behavior were discussed.     

Dispositional and Situational Autonomy as Moderators of Mood and Creativity

Although previous research suggests that mood can influence creativity, the controversy about the effects of positive and negative moods has raged for years. This study investigated how the relationship between induced mood and creativity is moderated by dispositional and situational autonomy. It contrasted the different moderating effects of the 2 kinds of autonomy. In Experiment 1, 93 participants completed a questionnaire about dispositional autonomy and performed a creative task after watching 1 of 3 film clips, which were to induce positive, negative, or neutral moods. The results of experiment 1 indicated that positive moods prompted creativity and negative moods inhibited creativity when individuals were low in dispositional autonomy (low in autonomous orientation or high in impersonal orientation). In Experiment 2, 73 participants engaged in a game to manipulate levels of situational autonomy and induce positive or negative moods. The results of experiment 2 showed that positive moods fostered greater creativity than did negative moods when individuals were in full-autonomy condition. The different moderating effects of dispositional and situational autonomy are discussed.