Individual differences in the relationship between pleasure and arousal

The two fundamental dimensions assumed to underlie emotional experience—pleasure and arousal—are considered to be independent across individuals. We present evidence from an experience sampling study demonstrating that this independence does not necessarily hold when considering the affective experiences of a single individual. Participants (N = 80) reported how they were feeling in terms of pleasure and arousal nine times a day for seven days. The data showed that, although on average pleasure and arousal were independent, within-person pleasure–arousal associations substantially varied and ranged from strongly positive to strongly negative. This finding demonstrates that pleasant/unpleasant feelings usually co-occur with high arousal for some (reflecting joy/stress), but with low arousal for others (reflecting relaxation/sadness) and that persons differ in whether arousal is usually pleasant or unpleasant. These differences were found to be related to dispositional reward responsiveness, with high reward responsive individuals being characterized by a positive relation between pleasure and arousal and vice versa.     

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.     

The relationship between arousal and positive self-presentation

Investigated the validity of the hypothesis that subjects would experience arousal if they received information suggesting that they were presenting themselves to others in a negative manner. Twenty-seven subjects were randomly assigned to a control, evaluation apprehension, or negative feedback group. Subjects' heart-rate was continuously monitored as subjects' rated a series of photographs. Subjects in the evaluation apprehension group were given a cue as to how to present themselves positively whereas subjects in the negative feedback group were told, following their response to the 15th photograph, that their responses suggested maladjustment. Heart-rate change above a baseline measure revealed that an increase in heart-rate occurred only when subjects were informed that they were transmitting negative information. Such a finding supports a positive self-presentation explanation of subject motives in the psychological experiment.     

The relationship between reaction time and intensity in discrete auditory tasks

The effect of signal intensity upon reaction time (RT) was studied in three auditory RT tasks in which the signal was a tone of high or low frequency. Experiment I showed the well-known negative gradient with intensity of simple RT when the subject was instructed to ignore the frequency and give the same response to both tones. But when the subject had to discriminate the frequency in a choice RT task, the RT/intensity relationship appeared to be U-shaped. Experiment II showed that when the subject was required to make a response to one signal but withhold it for the other, a task which requires discrimination of the frequency of the tone but removes the necessity to choose between overt responses, no increase in RT at high intensities was obtained. The results indicate that it is the response choice stage rather than the stimulus encoding stage which is retarded at higher energy levels. Experiment I also demonstrated that visual and auditory leading signals have similar facilitating effects without affecting the RT/intensity relationships.     

Age differences in the relationship between visual movement imagery and performance on kinesthetic acuity tests

The Vividness of Movement Imagery Questionnaire was administered to 280 fourteen-year-olds and 186 ten-year-olds, who were then tested on measures of kinesthetic acuity. The relationship between visual movement imagery and kinesthetic acuity scores was significant in the older group: Those with high levels of visual movement imagery performed significantly better on measures of kinesthetic acuity than did those with low imagery. No such effect was found in the younger group. The results indicate that for adolescents, the confounding effect of visual imagery affects the researcher's ability to interpret kinesthetic acuity scores. The relationship between imagery and kinesthesis appears to develop over the period between 10 and 14 years, although such an interpretation may be premature because the measurement of visual movement imagery in the younger age group is problematic.     

Age and sex differences in reaction time in adulthood: results from the United Kingdom Health and Lifestyle Survey

Reaction times (RTs) slow and become more variable with age. Research samples are typically small, biased, and of restricted age range. Consequently, little is known about the precise pattern of change, whereas evidence for sex differences is equivocal. The authors reanalyzed data for 7,130 adult participants in the United Kingdom Health and Lifestyle Survey, originally reported by F. A. Huppert (1987). The authors modeled the age differences in simple and 4-choice reaction time means and variabilities and tested for sex differences. Simple RT shows little slowing until around 50, whereas choice RT slows throughout the adult age range. The aging of choice RT variability is a function of its mean and the error rate. There are significant sex differences, most notably for choice RT variability.     

The relationship between induced emotional arousal and amnesia

An experiment was conducted to test a hypothesis emanating from a similarity in data pattern between studies on amnesia and studies on the effects of arousal on memory. The hypothesis was that arousal and amnesia might be related, or more precisely, that amnesia induced in the laboratory might be mediated by high levels of arousal. Subjects in this experiment were presented with a thematic, short story in pictorial form. One version of the story consisted of a traumatic, arousal-inducing event placed between neutral events. A second version of the story contained the same neutral events in the beginning and the end, but also a neutral event in the middle. Palmar skin conductance, heart rate, and subjective self-ratings were used to determine that the manipulation made had caused different degrees of emotional arousal for the two groups of subjects presented with the different versions of the story. The methods used to determine memory performance were recall and recognition. The data obtained indicate that amnesia induced in the laboratory is mediated by emotional arousal in terms of concepts of attention and reconstruction.     

The relationship between estimates of foreperiod duration and simple time reaction

The relationship between estimates of foreperiod length and simple reaction time (RT) was examined using constant foreperiods. It was learned that neither the average accuracy nor the variability of the foreperiod estimates necessarily manifested themselves in appropriate simple RT change. Of secondary interest was the discovery that the average accuracy of foreperiod duration estimations differed greatly from that obtained for similar time lengths in a time-estimation task. Finally, an attempt was made to determine whether subjects actually utilized the directional knowledge of results inherent in the imperative stimulus to influence their foreperiod duration judgments. Unfortunately, the evidence obtained did not permit a definite answer regarding this possibility.     

Evaluating the relationship between explicit and implicit knowledge in a sequential reaction time task

Can knowledge underlying a simple perceptual-motor skill be unconscious? Three experiments (a) trained participants on a 4-choice reaction time (RT) task in which the stimulus on each trial was determined by a repeating 12-element sequence and (b) studied the extent to which participants' knowledge of this sequence was implicit, that is, unavailable for conscious access. Participants proved via an indirect test to have acquired knowledge of the sequence, because their RTs increased when the sequence was changed. To evaluate whether this knowledge was consciously accessible, participants were asked to perform an "objective" free-generation or recognition test of sequence knowledge. Results show that sequence knowledge is fully accessible on these objective tests. Moreover, it is demonstrated in this procedure that old-new recognition cannot be explained by unconscious attribution of perceptual-motor fluency. The question is raised whether distinct implicit (procedural) and explicit (declarative) forms of knowledge are acquired when participants learn a perceptual-motor skill.     

Age differences between leader and followers as a moderator of the relationship between transformational leadership and team performance

In a field study of 49 R&D teams in the pharmaceutical industry, the age difference between the team leader and the team members was examined as a moderator of the relationship between transformational leadership and team supervisors' longitudinal ratings of team performance. Data collected from 285 team members and 21 team supervisors showed that this relationship was positive when the leader was older than the other team members, but non‐significant when the leader's age was closer to the mean age of the team members. This finding broadens the still fragmentary knowledge of the conditions under which transformational leadership is likely to have more or less positive effects on team performance.     

EEG and personality differences between smokers and nonsmokers

Bilateral EEG spectra and personality were assessed in 46 habitual smokers and 46 nonsmokers, matched for age and gender. Smokers tended to have more activated EEG's than nonsmokers as indicated by higher dominant and median alpha frequencies and more fast and less slow frequency activity when relaxing with their eyes closed. Female smokers, compared to female nonsmokers, scored higher on personality trait measures of anger-proneness and psychoticism and lower on the Eysenck Personality (EPQ) conventionality/lie scale. Among males, the EPQ psychoticism scale, which has also been associated with anger, was the only personality measure found to significantly differentiate smokers from nonsmokers. The combination of EEG and personality findings is consistent with the view that there are differences between smokers and nonsmokers, such that smokers are more aroused and potentially irritated or angered more easily than nonsmokers.     

Individual differences in right and left reaction time.

Experiments designed to check the absence of effects for hands and handedness in simple and two-choice reaction time found unexpected individual differences related to stimulus laterality. The majority of subjects responded faster to the stimulus on the left and a substantial minority responded faster to the stimulus on the right in any choice pair. The right index finger was slower than the left index or the middle fingers. Choices tended to be faster between fingers on different hands than on the same hand and same-hand choices were faster with the left hand than the right hand. There were no effects attributable to hand preference or sex.     

Age differences in the allocation of study time account for age differences in memory performance

How aging affects the utilization of monitoring in the allocation of study time was investigated by having adults learn paired associates during multiple study-test trials. During each trial, a subject paced the presentation of individual items and later judged the likelihood of recalling each item on the upcoming test; after all items had been studied and judged, recall occurred. For both age groups in Study 1, (1) people’s judgments were highly accurate at predicting recall and (2) intraindividual correlations between judgments (or recall) on one trial, and study times on the next trial were negative, which suggests that subjects utilized monitoring to allocate study time. However, the magnitude of these correlations was less for older than for younger adults. Study 2 revealed that these differences were not due to age differences in forgetting. Results from both studies suggest that older adults do not utilize on-line monitoring to allocate study to the same degree as younger adults do, and that these differences in allocation contribute to age deficits in recall.     

Age differences in forgiveness: the role of future time perspective

This study investigated whether the age trend in forgiveness is partly attributable to age differences in time perspective. Eighty-nine younger and 91 older adults were randomized into 3 experimental conditions: time-expanded, time-limited, and neutral. They responded to hypothetical offensive scenarios and rated the degree to which they would forgive the perpetrator. Results showed that older adults were more forgiving than younger adults, but regardless of age, those in the time-limited condition were more forgiving than those in the time-expanded or the neutral condition. An Age x Time perspective interaction showed that only in older adults did a time-expanded manipulation lead to lower forgiveness than the neutral condition. (PsycINFO Database Record (c) 2008 APA, all rights reserved).     

Gender differences in the relationship between empathy and forgiveness

Much research has shown that women are more empathic than men. Yet, women and men are equally forgiving. However, it is not clear whether empathy is more important to forgiveness for men or for women. The purpose of the present study was to examine gender differences in levels of empathy and forgiveness and the extent to which the association of empathy and forgiveness differed by gender. Participants were 127 community residents who completed self-report measures of empathy and forgiveness. The present results showed that women were more empathic than men, but no gender difference for forgiveness was apparent. However, the association between empathy and forgiveness did differ by gender. Empathy was associated with forgiveness in men--but not in women.     

沉思与宽恕关系的性别差异

The authors investigated the associations between rumination and forgiveness in male and female respectively. One hundred and twenty-seven college students (88F and 39M) completed self-report measures of rumination and forgiveness. Results showed that there were no apparent gender differences in rumination and forgiveness; rumination was associated with forgiveness in women-but not in men.