授权型领导的负面效应：理论机制与边界条件

已有研究主要关注授权型领导的正面影响, 然而, 新近的研究表明授权型领导可能也会引发潜在的负面效应。针对此问题, 首先界定了授权型领导的概念及其核心特征。其次, 基于双重任务加工效应、角色理论和内隐领导理论, 阐释了授权型领导负面效应的理论机制, 并进一步分析和总结了授权型领导的有效性在何种条件下能够实现。最后, 提出了授权型领导负面效应未来研究方向的建议。     

Stimulus salience and relational task performance

Previous research has inferred relational processing from infants' increased attention to stimuli containing different elements following habituation to a series of stimuli containing identical elements. This finding was replicated, but infants were also found to prefer the different-element stimuli without prior habituation. Infants' performance on this task may be attributed to stimulus salience rather than relational processing.     

The effects of age and task context on Stroop task performance

In this study, we investigated the impact of age and task context on Stroop task performance, using error scores, response latencies, and process dissociation estimates (e.g., Lindsay & Jacoby, 1994). Across three experiments, the findings showed that although older adults were able to evaluate Stroop task demands and modify their representations of task context in response to this knowledge, they were less able to maintain and update these representations on a trial-by-trial basis in tasks with high stimulus uncertainty or ambiguity. Moreover, although there was no age-related decline in the ability to modulate print color information, older adults were consistently less able to control the activation of conflicting word information. Together, these findings suggest that whereas age differences in the Stroop task may be magnified under conditions that promote transient failures to maintain task context, the primary source of these differences seems to be a more enduring decline in the efficiency of processes that are responsible for suppressing the activation of irrelevant lexical information.     

The effects of age and task domain on dual task performance: A meta-analysis

Recent research has provided mixed findings as to whether older adults find dual tasking problematic. Here, we examined whether methodological variations across studies can account for the discrepancies in the literature. Meta-analyses conducted on the results of 34 studies conducted between 1981 and 2003 found a strong overall effect size (d = .68), which indicated a clear age-related dual tasking impairment. However, this effect size was not representative of all the individual studies reported. Subsequent analyses, using an analysis of variance analogue (Hedges & Olkin, 1985), investigated potential moderators responsible for the variability in the effect sizes across studies. These secondary analyses included a comparison of dependent measure used, whether baseline differences in performance had been controlled for, and task domain. Task domain was found to be the critical moderator variable. Notably, tasks with a substantial controlled processing, or motor component showed greater dual task impairment than tasks that were relatively simple or relied on automatic processing.     

Object attention revisited: identifying mechanisms and boundary conditions

Multiple attributes of a visual array are often more efficiently processed when they are attributes of a single object than when they are attributes of different objects—a pattern reflecting the limitations of object attention. This study used psychophysical methods to evaluate the object attention limitations in the report of attributes (orientation and phase) computed early in visual analysis for spatially separated objects. These limitations had large effects on dual-object report thresholds when different judgments were required for the two objects (orientation for one object and phase for the other), but the effects were small or nonexistent when the same judgment was made about both objects. Judgment consistency reduced or eliminated the expression of object attention deficits. Thus, the deficits in dual-object report reflect both division of attention over objects and the calculation of independent reference or judgment operations. Dual-object deficits, when they occurred, were substantial in displays with external noise masks. Smaller effects were observed in clear displays, even when difficulty was equated by stimulus contrast. Thus, the primary consequence of object attention is the exclusion of external noise, or mask suppression, and enhancement of the stimulus in clear displays is a secondary consequence.     

The interactive effects of task complexity and participation on task performance: A field experiment

Goal-setting investigators have suggested that participation in the goal-setting process may be important for both motivational and cognitive reasons; however, goal-setting research has focused almost exclusively on the motivational aspect of participation, while generally ignoring the cognitive aspect. In an attempt to demonstrate the cognitive implications of participation, a field experiment was conducted with 40 computer programmers writing either a simple or a complex program. Half the participants were actively involved in discussing the project and in jointly determining the completion target, while the other half were simply assigned completion times of equivalent difficulty. It was hypothesized that, for complex programs, individuals participating in the discussion process would outperform individuals having assigned targets of similar difficulty. In contrast, for simple programs, it was expected that participation would have no effect on task performance. The data were analyzed using a 2 × 2 ANOVA procedure, and results strongly supported the hypothesized interaction. Discussion centered on the implications of the findings for future research in this area.     

Dual relational model of perceived overqualification: Employee's self‐concept and task performance

Drawing upon self‐representation theory and using a relationship perspective, we constructed a dual‐path‐moderated mediation model to examine the relationship between employees’ perceived overqualification and task performance. We tested this model with data from a sample of 242 subordinate‐supervisor dyads in Shanghai, China. The results suggested that perceived overqualification had a negative indirect effect on task performance through perceived insider status (PIS), and popularity moderated the negative association between perceived overqualification and PIS. In addition, the relationship between perceived overqualification and task performance via organization‐based self‐esteem was positive when supervisor‐subordinate guanxi was high but negative when it was low. The implications, limitations, and future research directions of these findings are discussed.     

The effects of music and task difficulty on performance at a visual vigilance task

Forty subjects performed a visual vigilance task in music or noise and when the task was difficult or easy. Response measures taken were: correct detections, commission errors, detection latencies and d' values. For the difficult version of the task a significant increase in detection latencies was found which music prevented. Broadly similar findings were obtained for correct detections. The results are compared with other studies of detection latency and task difficulty and are discussed in terms of arousal.     

The effects of goal difficulty on physiological arousal, cognition, and task performance.

Two laboratory experiments with 117 undergraduate students were conducted to examine (a) the effect of assigned goal difficulty on arousal (self-report and heart rate), cognition (perceived norm, self-efficacy strength, and personal goal), and behavioral (task performance) measures and (b) the role of heart rate as a mediator of the goal-difficulty-performance relation. All Ss performed a task requiring cognitive and physical responses. Results of both experiments demonstrated that assigned goal difficulty affected heart rate, cognition, and task performance and that heart-rate change was positively related to the cognitive and behavioral measures. Regression analyses suggested that a cognitive-affective mechanism may mediate the goal-difficulty-performance relation. Discussion is focused on the theoretical and practical implications of integrating an arousal concept within goal-setting theory.     

The effects of workload history on dual task performance

The purpose of this study was to examine the effects of workload history (specifically sudden workload shifts) on performance. A sample of 204 undergraduates was randomly assigned to either a sudden decrease or increase in workload condition. Participants simultaneously performed a memory search task (i.e., primary task) and an auditory vigilance task (i.e., distracter task), while percent correct was recorded. Separate Repeated Measures ANOVA’s revealed a significant treatment effect for the Medium to Low (F(l, 110) = 274.6, p < .01) and Low to Medium (F(l,92) = 148.3, p < .01) conditions. Results supported previous research suggesting that either a sudden decrease (Medium to Low) or increase (Low to Medium) in workload could be detrimental to performance (Cox-Fuenzalida, 2000). More importantly, this study extends the detrimental effects of workload history to a dual task environment. The authors express their gratitude to the research team from the Personality and Human Performance Lab at the University of Oklahoma for their invaluable assistance in data planning and collection.     

The effects of workload history on dual task performance

The purpose of this study was to examine the effects of workload history (specifically sudden workload shifts) on performance. A sample of 204 undergraduates was randomly assigned to either a sudden decrease or increase in workload condition. Participants simultaneously performed a memory search task (i.e., primary task) and an auditory vigilance task (i.e., distracter task), while percent correct was recorded. Separate Repeated Measures ANOVA’s revealed a significant treatment effect for the Medium to Low (F(l, 110) = 274.6, p < .01) and Low to Medium (F(l,92) = 148.3, p < .01) conditions. Results supported previous research suggesting that either a sudden decrease (Medium to Low) or increase (Low to Medium) in workload could be detrimental to performance (Cox-Fuenzalida, 2000). More importantly, this study extends the detrimental effects of workload history to a dual task environment. The authors express their gratitude to the research team from the Personality and Human Performance Lab at the University of Oklahoma for their invaluable assistance in data planning and collection.     

Social influence and sex effects on task performance and task perceptions

A laboratory experiment was conducted to investigate the effects of observer presence and subject sex on both performance quantity and quality, job satisfaction, and task perceptions. Multivariate analysis of covariance (MANCOVA) results demonstrated statistically significant multivariate effects on the performance measures. Significant main effects of observer presence were found for performance quality but not quantity. A significant observer presence x subject sex interaction was found for performance quantity. The results for task perceptions supported the hypothesis that the situational factors would make salient the significance of the task. Main effects of observer presence were found for task significance only. Also there was a significant observer presence x subject sex interaction on perceptions of task significance. No effects were found on job satisfaction, consistent with past research. The results are discussed relative to social facilitation research in the broader context of social influence.     

Dual-task decrements in driving performance: The impact of task type,working memory,and the frequency of task performance

Driving while carrying out another (secondary) task interferes with performance, though the degree of interference may vary between tasks and individual drivers. In this study, we focused on two potentially interrelated individual difference variables that may play a role in determining dual-task interference: working memory capacity and the driver’s experience with the relevant secondary task. We used a driving simulator to measure interference, comparing single-task performance (driving alone) with driving performance during three secondary tasks: conversing on a handsfree cellphone, texting, and selecting a song on a touchscreen Mp3 player. Drivers also rated the difficulty of driving while carrying out each secondary task. For the individual difference variables, working memory was measured using the Operation Span test (OSPAN), and experience was assessed in terms of self-reported daily driving exposure and exposure to the relevant secondary tasks (frequency, duration). Overall, we found evidence of dual-task interference, though interference varied between tasks; the texting and Mp3 tasks produced significantly more interference than handsfree cellphone conversation. For the texting and Mp3 song selection tasks, interference was apparent in terms of increased steering variability, but for the Mp3 task there was also compensatory slowing, with drivers slowing down while carrying out the task. OSPAN performance and daily driving exposure were both covariates in predicting the amount of dual-task interference. However, our results suggest that in all but two cases, both involving the texting task, the effects of the OSPAN and the driving and secondary task exposure variables were independent rather than interrelated.     

The interactive effects of person-focused citizenship behaviour,task interdependence,and virtuality on team performance

A multifactorial between-groups experiment examined the effects of person-focused organizational citizenship behaviours (OCBP) on the performance of teams characterized by different levels of virtuality and task interdependence. Results reveal in low virtual teams the moderating effects of task interdependence on the OCBP–team performance relationship are positive; however, these effects are reversed in high virtual teams. Using social presence and task–technology fit theories, our results indicate that task context affects how OCBP impacts team performance, particularly across different levels of team virtuality. The implications for research on OCB and the management of virtual teams are discussed.     

The effects of sex differences and evaluation on task performance and aspiration

An investigation was conducted of how evaluation differentially affects the performance and aspiration for future performance of 118 high school boys and girls. Subjects were selected to fit into either a superior or average intelligence group. In the high evaluation condition, subjects were instructed that their intelligence was being evaluated in anagram and visual-motor tasks they performed, while those in the low evaluation condition were instructed that the two tasks were being correlated. It was hypothesized that on a highly evaluated task, girls, when compared to boys, would show greater performance debilitation and would have lower aspirations for future performance. Although sex differences were found in performance debilitation and aspiration for future performance, they were not all in the predicted directions. Girls were equally debilitated in anagram performance under both evaluation conditions, while boys were debilitated in anagram performance only under high evaluation. When both boys and girls demonstrated a performance debilitation on the anagram task, their performance declined approximately 10%. No sex differences in performance were found on the visual-motor task. On both tasks, girls' aspirations were significantly affected by evaluation condition. The girls averaged 89% choosing the more difficult task in the low evaluation condition. Evaluation condition had no significant effect on aspiration for boys on either task. Intelligence showed no significant relationships.     

Goal orientation and task demand effects on motivation, affect, and performance

Two studies tested the joint effects of goal orientation and task demands on motivation, affect, and performance, examining different factors affecting task demands. In Study 1 (N = 199), task difficulty was found to moderate the effect of goal orientation on performance and affect (i.e., satisfaction with performance). In Study 2 (N = 189), task consistency was found to moderate the effect of goal orientation on self-efficacy and intrinsic motivation. Results are discussed in relation to self-regulatory processes cued by goal orientations, attentional resource demands, and the need to match goal orientations to the nature of the task.