Autobiographical memory: unpleasantness fades faster than pleasantness over time

We examined the effects of retention intervals on the recollection of the emotional content of events. Memory for personal events was tested for three retention intervals: 3 months, 1 year, and 4.5 years. Participants made pleasantness ratings both at the time of recording the event and during testing of the events. Analyses of the data show that judgments of pleasantness or unpleasantness of an event became less extreme as retention interval increased. This effect was larger for unpleasant events than for pleasant events. Subsequent memory ratings of pleasant and unpleasant events showed a modest effect of pleasantness with pleasant events remembered slightly better than unpleasant events. The theoretical implications of these data are discussed. © 1997 John Wiley & Sons, Ltd.     

Olfactory hedonic context affects both self-report and behavioural indices of palatability

Prior exposure to either a pleasant or unpleasant context may affect later hedonic judgments of a common target stimulus. We explored whether this effect translates into behaviour in the chemical senses. In experiment 1 participants experienced either a pleasant or unpleasant set of odours or pictures, followed by an unfamiliar odour. After self-report hedonic evaluations of the odour, participants were allowed to drink it in solution, followed by a further evaluation of its flavour. Participants reported liking the odour less after smelling pleasant odours and drank less of it too, relative to the unpleasant context. There was no differential context effect for emotive pictures. Experiment 2 replicated these effects, but also included a no-context control. This revealed that the consumption effect was localised to the pleasant olfactory context, whilst contextual effects for liking ratings were primarily localised to the unpleasant olfactory context. In conclusion, hedonic context affects both self-report and behaviour, but not in the same way.     

Event-related potentials of emotional memory: encoding pleasant,unpleasant, and neutral pictures

Emotional events tend to be remembered better than nonemotional events. We investigated this phenomenon by measuring two event-related potential (ERP) effects: the emotion effect (more positive ERPs for pleasant or unpleasant stimuli than for neutral stimuli) and the subsequent memory effect (more positive ERPs for subsequently remembered items than for subsequently forgotten items). ERPs were measured while subjects rated the emotional content of pleasant, unpleasant, and neutral pictures. As was expected, subsequent recall was better for pleasant and unpleasant pictures than for neutral pictures. The emotion effect was sensitive to arousal in parietal electrodes and to both arousal and valence in frontocentral electrodes. The subsequent memory effect at centroparietal electrodes was greater for emotional pictures than for neutral pictures during an early epoch (400-600 msec). This result suggests that emotional information has privileged access to processing resources, possibly leading to better memory formation.     

Age differences in emotional reactions: arousal and age-relevance count

Recent findings suggest positivity effects in older adults' attention and memory, but few studies have examined such effects on the level of emotional reactivity. In this study, 52 young and 52 older adults rated 172 pictures of the International Affective Picture System, differing in arousal and age-relevance, in terms of valence and discrete emotions. Age differences in the ratio of pleasantness reactions to pleasant pictures vs. unpleasantness reactions to unpleasant pictures as well as age differences in absolute levels of unpleasantness and pleasantness reactions suggest that positivity effects in older adults' subjective emotional reactions are reduced under high arousal. There is also evidence that positivity effects may be restricted to stimuli with low relevance in old age.     

Perceptual,affective, and cognitive judgments of odors: pleasantness and handedness effects

The present study sought to examine the differential processing of pleasant, neutral, and unpleasant odors. The effects of the nostril stimulated (left or right) and the type of judgment (perceptual, affective, or cognitive) performed on the olfactory stimuli were also studied. To this end, 64 subjects were asked to smell pleasant, neutral, and unpleasant odors under four conditions (detection, intensity, pleasantness, and familiarity tasks). The participants were to perform these tasks as quickly as possible, while response times were recorded. The results showed that (i) unpleasant odors were assessed more rapidly than neutral or pleasant odors, and that this was specifically true (ii) during right nostril stimulation, and (iii) during pleasantness assessment, suggesting possible differential cerebral hemisphere involvement, with a right-side advantage for processing of unpleasant affect in olfaction. A handedness effect on familiarity judgment is also discussed.     

Must interesting things be pleasant? A test of competing appraisal structures

What makes something interesting? Appraisal research has proposed two appraisal structures for the emotion of interest. One model (Smith & Ellsworth, 1985) contends that appraised pleasantness is central to interest, whereas an alternative model (Silvia, 2005b) contends that pleasantness is unnecessary for interest. An experiment tested these competing predictions. Participants viewed calming and disturbing paintings, rated each picture for appraisals, and reported their experienced interest and pleasantness/ enjoyment. Within-person analyses found that (a) interest and pleasantness were essentially unrelated; (b) appraised novelty- complexity positively predicted interest, but negatively predicted pleasantness; and (c) disturbing pictures were highly interesting but unpleasant, whereas calming pictures were highly pleasant but uninteresting. The results thus strongly suggest that interesting things needn't be pleasant. Implications for in vivo (versus retrospective) tests of competing appraisal predictions are considered.     

Remembering pictures: pleasure and arousal in memory.

Incidental memory performance for pictures that varied along the affective dimensions of pleasantness and arousal was assessed. For both an immediate and delayed (1 year later) free-recall task, only the arousal dimension had a stable effect on memory performance: Pictures rated as highly arousing were remembered better than low-arousal stimuli. This effect was corroborated in a speeded recognition test, in which high-arousal materials encoded earlier in the experiment produced faster reaction times than their low-arousal counterparts. Pleasantness affected reaction time decisions only for pictures not encoded earlier. These results suggest that whereas both the dimensions of pleasantness and arousal are processed at initial encoding, long-term memory performance is mainly affected by arousal.     

青年人和老年人加工情绪图片过程中的注意偏向:眼动研究

利用眼动追踪技术,考察了老年人与青年人加工情绪图片过程中的注意偏向及再认成绩。给被试同时呈现积极、中性及消极情绪图片,分为注意和记忆两部分任务。基于线性混合模型的分析发现,与青年人相比,老年人表现出对积极图片更大的注意偏向,且在随后的再认过程中对积极情绪图片的再认正确率更高。结果支持了社会情绪选择理论,说明中国老年人同样存在“积极效应”,情绪加工过程中能够通过选择偏爱的积极情绪信息来适应老化。     

Semantic contribution to verbal short-term memory: Are pleasant words easier to remember than neutral words in serial recall and serial recognition?

In the four experiments reported here, we examined the role of word pleasantness on immediate serial recall and immediate serial recognition. In Experiment 1, we compared verbal serial recall of pleasant and neutral words, using a limited set of items. In Experiment 2, we replicated Experiment 1 with an open set of words (i.e., new items were used on every trial). In Experiments 3 and 4, we assessed immediate serial recognition of pleasant and neutral words, using item sets from Experiments 1 and 2. Pleasantness was found to have a facilitation effect on both immediate serial recall and immediate serial recognition. This study supplies some new supporting arguments in favor of a semantic contribution to verbal short-term memory performance. The pleasantness effect observed in immediate serial recognition showed that, contrary to a number of earlier findings, performance on this task can also turn out to be dependent on semantic factors. The results are discussed in relation to nonlinguistic and psycholinguistic models of short-term memory.     

Eye movement assessment of selective attentional capture by emotional pictures

The eye-tracking method was used to assess attentional orienting to and engagement on emotional visual scenes. In Experiment 1, unpleasant, neutral, or pleasant target pictures were presented simultaneously with neutral control pictures in peripheral vision under instruction to compare pleasantness of the pictures. The probability of first fixating an emotional picture, and the frequency of subsequent fixations, were greater than those for neutral pictures. In Experiment 2, participants were instructed to avoid looking at the emotional pictures, but these were still more likely to be fixated first and gazed longer during the first-pass viewing than neutral pictures. Low-level visual features cannot explain the results. It is concluded that overt visual attention is captured by both unpleasant and pleasant emotional content.     

Emotional processing and emotional memory are modulated by interoceptive awareness

The ability to perceive interoceptive signals plays a central role in many theories of emotions. The present study was designed to investigate the relationship between interoceptive awareness and the conscious processing and memory of emotional information. Heart-rate changes were recorded during baseline and affective picture presentation in two groups of participants, differing in cardiac awareness. After a 60-minute break, a recognition task was conducted. Statistical analyses revealed significantly stronger heart-rate deceleration to pleasant and unpleasant stimuli in participants with high interoceptive awareness. In the subsequent picture recognition task, participants with high interoceptive awareness demonstrated a superior recall of pleasant and unpleasant pictures, while no differences were found between interoceptive awareness groups for pictures of neutral content. Our results demonstrate a strong relationship between the perception of cardiac signals and both the processing as well as the recognition of emotional stimuli. High interoceptive awareness was related to increased physiological responses to emotional stimuli and is therefore an important mediating variable when investigating cardiovascular reactivity both in healthy subjects as well as in clinical populations.     

Recognizing images: The role of motivational significance,complexity, social content,age, and gender

Memory for affective events plays an important role in determining people’s behavior and well-being. Its determinants are far from being completely understood. We investigated how recognition memory for affective pictures depends on pictures’ motivational significance (valence and arousal), complexity (figure-ground compositions vs. scenes), and social content (pictures with people vs. without people) and on observers’ age and gender. Younger, middle-aged, and older adults viewed 84 pictures depicting real-life situations. After a break, the participants viewed 72 pictures, half of which had been viewed previously and half of which were novel, and were asked to endorse whether each picture was novel or had been presented previously. Hits, false alarms, and overall performance (discrimination accuracy) were our dependent variables. The main findings were that, across participants, recognition memory was better for unpleasant than pleasant pictures and for pictures depicting people than pictures without people. Low-arousal pictures were more accurately recognized than high-arousal pictures, and this effect was significantly larger among middle-aged and older adults than younger adults. Recognition memory worsened across adulthood, and this decline was steeper among men than women. Middle-aged and older women outperformed their male counterparts. This study suggests that how well we are able to successfully discriminate previously seen pictorial stimuli from novel stimuli depends on several pictures’ properties related to their motivational significance and content, and on observer’s age and gender.     

Memory for unique personal events: Effects of pleasantness

College students recorded unique personal events for a 3-month period. At the time of recording, they rated the pleasantness or unpleasantness of the event. Subsequent memory ratings showed no effect of type of affect (i.e., pleasant vs. unpleasant events) but a strong influence of intensity of affect. In contrast, the data for estimating the date of occurrence of events showed an effect of type of affect, with pleasant events estimated more accurately than unpleasant events. A detailed analysis of the data indicated that the effect could not be attributed to the predictability of pleasant events. A red-letter day effect was proposed as an explanation for the estimation data.     

Emotional state affects the initiation of forward gait

The aim of the current study was to determine the extent to which pleasant and unpleasant emotional states impact the initiation of forward gait. Participants initiated gait and walked for several steps following the presentation of low arousing pleasant, high arousing pleasant, low arousing unpleasant, high arousing unpleasant, and neutral pictures. Reaction time, displacement, and velocity of the center of pressure (COP) trajectory, and length and velocity of the first and second steps were calculated. Exposure to the highly arousing unpleasant pictures reduced reaction times compared to all other affective conditions. Compared to the low arousing unpleasant pictures, exposure to the high and low arousing pleasant pictures increased the displacement of the COP movement during the anticipatory postural adjustment phase of gait initiation. Additionally, exposure to the low arousing pleasant pictures increased the velocity of the COP movement during the anticipatory postural adjustment phase, compared to the high and low arousing unpleasant pictures. Exposure to the high and low arousing pleasant pictures increased the velocity of the first step relative to the low arousing unpleasant pictures. These findings demonstrate that highly arousing unpleasant emotional states accelerate the initial motor response, but pleasant emotional states generally facilitate the initiation of forward gait due to the approach-oriented directional salience of the movement. These findings extend the scope of the motivational direction hypothesis by demonstrating the effects of emotional reactivity on the initiation of gait.     

Effects on incidental memory of affective tone in associated past and future episodes: influence of emotional intelligence

The present study examined the effects of emotion elicited by episodes (past events or expected future events) and the relationship between individual differences in emotional intelligence and memory. Participants' emotional intelligence was assessed on the Japanese version of Emotional Skills and Competence Questionnaire. They rated the pleasantness of episodes they associated with targets, and then performed unexpected free recall tests. When the targets were associated with episodes that were past events, all participants recalled more of the targets associated with pleasant and unpleasant episodes than those associated with neutral episodes. However, when the targets were associated with episodes expected to occur in the future, only participants with higher emotional intelligence scores recalled more of the targets associated with pleasant and unpleasant episodes. The participants with lower emotional intelligence scores recalled the three target types with similar accuracy. These results were interpreted as showing that emotional intelligence is associated with the processing of targets associated with future episodes as retrieval cues.     

Assessing the Initial Pleasantness for Fading Affect,Fixed Affect,Flourishing Affect,and Flexible Affect Events

Over time, autobiographical memories demonstrate fixed affect (i.e., maintain initial affect), fading affect, flourishing affect (i.e., increased affect), or flexible affect (i.e., change from unpleasant to pleasant or vice versa). Walker and Skowronski argued that events low in initial pleasantness are more likely to exhibit flourishing affect and flexible affect and that unpleasant events are more likely to demonstrate flexible affect than pleasant events. However, because of the low frequency of flourishing affect and flexible affect events in individual studies, research had not examined differences between these event categories. The present study examined initial pleasantness ratings for fading affect, fixed affect, flourishing affect, and flexible affect events across four published studies. We expected and generally found lower initial pleasantness for flourishing affect and flexible affect events than for fading affect and fixed affect events. Implications are discussed. Copyright © 2016 John Wiley & Sons, Ltd.     

Recognition memory for pictorial stimuli: biasing effects of stimulus emotionality

The possibility that stimulus emotionality might influence recognition bias in a long-term memory task was studied with respect to both the valence and arousal dimensions of emotion. For this purpose, we used 108 International Affective Picture System pictures that were representative of all regions of this two-dimensional space. Signal detection theory analysis was applied using A'and B' D as discrimination and bias measures, respectively. In general, the results showed that greater discrimination was accompanied by a response bias that was more conservative for pleasant and for unarousing pictures than for unpleasant and for arousing ones. These results provide new evidence in connection with the emotion-induced recognition bias in long-term memory performance.     

Interrelationships Among Name Desirability, Name Uniqueness, Emotion Characteristics Connoted by Names, and Temperament

The subjects in Study 1 (the target group) provided their names and data on their own temperaments. The subjects in Study 2 rated the target group's names on uniqueness and desirability. The subjects in Study 3 rated the temperament qualities connoted by the names given by the target group. The name uniqueness and desirability scales had high reliabilities and correlated -0.44, showing that more unique names were less desirable. The qualities of pleasantness and dominance, which were connoted by a person's name, were judged very reliably. Names that connoted psychological health versus maladjustment (pleasant/ unpleasant temperament) were indeed associated with pleasant/unpleasant temperament attributes. The pleasantness and dominance connoted by names enhanced the desirability of those names, whereas greater unpleasantness and submissiveness were connoted by more unique names.     

Interrelationships Among Name Desirability, Name Uniqueness, Emotion Characteristics Connoted by Names, and Temperament

The subjects in Study 1 (the target group) provided their names and data on their own temperaments. The subjects in Study 2 rated the target group's names on uniqueness and desirability. The subjects in Study 3 rated the temperament qualities connoted by the names given by the target group. The name uniqueness and desirability scales had high reliabilities and correlated -0.44, showing that more unique names were less desirable. The qualities of pleasantness and dominance, which were connoted by a person's name, were judged very reliably. Names that connoted psychological health versus maladjustment (pleasant/ unpleasant temperament) were indeed associated with pleasant/unpleasant temperament attributes. The pleasantness and dominance connoted by names enhanced the desirability of those names, whereas greater unpleasantness and submissiveness were connoted by more unique names.