Exploring the Effects of Interruptions in Different Phases of Complex Decision-Making Tasks

OBJECTIVE

The study aims to examine the effects of interruptions in major phases (i.e., problem-identification, alternative-development, and evaluation-and-selection) of complex decision-making tasks.

BACKGROUND

The ability to make complex decisions is of increasing importance in workplaces. Complex decision-making involves a multistage process and is likely to be interrupted, given the ubiquitous prevalence of interruptions in workplaces today.

METHOD

Sixty participants were recruited for the experiment to complete a procurement task, which required them to define goals, search for alternatives, and consider multiple attributes of alternatives to make decisions. Participants in the three experimental conditions were interrupted to respond to messages during one of these three phases, whereas participants in the control condition were not interrupted. The impacts of interruptions on performance, mental workload, and emotional states were measured through a combination of behavioral, physiological, and subjective evaluations.

RESULTS

Only participants who were interrupted in the evaluation-and-selection phase exhibited poorer task performance, despite their positive feelings toward interruptions and confidence. Participants who were interrupted in the problem-identification phase reported higher mental workload and more negative perceptions toward interruptions. Interruptions in the alternative-development phase led to more temporal changes in arousal and valence than interruptions in other phases.

CONCLUSION

Interruptions during the evaluation-and-selection phase undermine overall performance, and there is a discrepancy between behavioral outcomes and subjective perceptions of interruption effects.

APPLICATION

Interruptions should be avoided in the evaluation-and-selection phase in complex decision-making. This phase information can be either provided by users or inferred from coarse-grained interaction activities with decision-making information systems.

Individual differences in everyday multitasking behavior and its relation to cognition and personality

Our ability to multitask-focus on multiple tasks simultaneously-is one of the most critical functions of our cognitive system. This capability has shown to have relations to cognition and personality in empirical studies, which have received much attention recently. This review article integrates the available findings to examine how individual differences in multitasking behavior are linked with different cognitive constructs and personality traits to conceptualize what multitasking behavior represents. In this review, we highlight the methodological differences and theoretical conceptions. Cognitive constructs including executive functions (i.e., shifting, updating, and inhibition), working memory, relational integration, divided attention, reasoning, and prospective memory were investigated. Concerning personality, the traits of polychronicity, impulsivity, and the five-factor model were considered. A total of 43 studies met the inclusion criteria and entered the review. The research synthesis directs us to propose two new conceptual models to explain multitasking behavior as a psychometric construct. The first model demonstrates that individual differences in multitasking behavior can be explained by cognitive abilities. The second model proposes that personality traits constitute a moderating effect on the relation between multitasking behavior and cognition. Finally, we provide possible future directions for the line of research.

Individual Strategies of Response Organization in Multitasking Are Stable Even at Risk of High Between-Task Interference

Recently, reliable interindividual differences were found for the way how individuals process multiple tasks (at a cognitive level) and how they organize their responses (at a response level). Previous studies have shown mixed results with respect to the flexibility of these preferences. On the one hand, individuals tend to adjust their preferred task processing mode to varying degrees of risk of crosstalk between tasks. On the other, response strategies were observed to be highly stable under varying between-resource competition. In the present study, we investigated whether the stability of response strategies also persists with increased risk of crosstalk or whether individuals adjust their choice of response strategy, similar to what has been found at the level of task processing modes. Besides, related differences in multitasking efficiency were assessed. For this purpose, 53 participants performed the Free Concurrent Dual-Tasking (FCDT) paradigm, which allows them to control their task scheduling and response organization. The participants completed the FCDT paradigm under two conditions including task pairs characterized by either low or high levels of risk of crosstalk. The free choice of task scheduling resulted in the previously found distinct response patterns, best described as blocking, switching or response grouping. Remarkably, we did not find any notable adjustments of strategies of response organization to the extent of crosstalk. However, we observed suspected performance decrements of a switching strategy in the condition of high risk of crosstalk. The results suggest that individual strategies of response organization are stable habits. Further, they illustrate disadvantages of switching vs. blocking strategies of response organization in case of high task similarity.

TIDES: examining the influence of temporal individual differences on multitasking in educational simulation

BACKGROUND

The majority of tasks nurses complete in acute care settings are time-sensitive. Due to complex patient needs, nurses' multitasking behavior is of growing importance. Situations involving multitasking behavior typically require nurses to switch their attention among multiple tasks and patients in a rapid fashion. Research suggests temporal individual differences such as time urgency, polychronicity, and time perspective influence decision-making. The factors suggest that balanced time perspective may facilitate multitasking. Given novice nurses commit errors related to multitasking, we evaluated the relationship between temporal individual differences, cognitive workload, and multitasking behaviors in a simulation setting.

METHODS

A one-group repeated measures design was used to evaluate the relationship between multitasking, demographic factors, cognitive workload, and temporal individual differences. One hundred sixty fourth-year, prelicensure nursing students independently completed two 45-min multiple patients simulations involving care of three interactive patient simulators. Participants completed the Multitasking Preference Inventory, Time Perspective Inventory, Experiences of Time survey, and Time Urgency Scale before simulation. A summary Creighton Simulation Evaluation Instrument score was used to represent multitasking. Participants completed the Task Load Index to represent cognitive workload. We calculated deviation from balanced time perspective and measured its correlation with multitasking. Regression models calculated how much variance deviation from balanced time perspective, demographic factors, and cognitive workload contributed to multitasking.

RESULTS

Standardized test scores were more predictive of multitasking than deviation from balanced time perspective (β = 0.19, t = 2.48, p = 0.0142). As deviation from balanced time perspective increased, multitasking behaviors decreased (r = - 0.17), participants reported a higher sense of urgency (r = 0.39), and they had more frustration after simulation (r = 0.22). Deviation from balanced time perspective did not influence cognitive workload.

CONCLUSIONS

Nursing students who demonstrate multitasking behaviors tend to have a more balanced time perspective. Knowing students' deviation from balanced time perspective may help educators anticipate who will need more assistance with multitasking in simulation. Nursing students frequently wait until just before graduation to provide care for multiple patients; including mention of deviation from balanced time perspective in simulation preparation may help senior nursing students become more self-aware and ultimately improve behavioral performance.

Dual-memory retrieval efficiency after practice: effects of strategy manipulations

The study investigated practice effects, instruction manipulations, and the associated cognitive architecture of dual-memory retrieval from a single cue. In two experiments, we tested predictions about the presence of learned parallelism in dual-memory retrieval within the framework of the set-cue bottleneck model. Both experiments included three experimental laboratory sessions and involved computerized assessments of dual-memory retrieval performance with strategy instruction manipulations. In Experiment 1, subjects were assigned to three distinct dual-task practice instruction groups: (1) a neutral instruction group without a specific direction on how to solve the task (i.e., neutral instruction), (2) an instruction to synchronize the responses (i.e., synchronize instruction), and (3) an instruction to use a sequential response style (i.e., immediate instruction). Results indicate that strategy instructions are able to effectively influence dual retrieval during practice. Mainly, the instruction to synchronize responses led to the presence of learned retrieval parallelism. Experiment 2 provided an assessment of the cognitive processing architecture of dual-memory retrieval. The results provide support for the presence of a structural bottleneck that cannot be eliminated by extensive practice and instruction manipulations. Further results are discussed with respect to the set-cue bottleneck model.

Investigating relationships among polychronicity, work-family conflict, job satisfaction, and work engagement

Purpose

The purpose of this paper is twofold: first, to examine whether polychronicity, an individual difference variable that involves a preference for multitasking, moderates the relationships between work-family conflict (WFC) and two work criteria, job satisfaction and work engagement; second, to examine two measures of polychronicity (the multitasking preference inventory (MPI) and the inventory of polychronic values (IPV)) and investigate whether polychronicity moderates the relationships between WFC and work criteria differently when measured by the MPI or the IPV.

Design/methodology/approach

The study’s sample included 257 respondents from the Amazon Mechanical Turk service who completed an online survey. Multiple regression analyses were conducted to test whether polychronicity moderated the relationships between WFC and two work criteria, job satisfaction and work engagement.

Findings

Polychronicity was found to significantly moderate the relationship between the work engagement and WFC. Follow-up analyses indicated that those who were lower in polychronicity had a significant decrease in work engagement as WFC increased, whereas those who were higher in polychronicity had relatively the same work engagement level regardless of changes in WFC. The results suggest that individuals higher in polychronicity have more personal resources and may be more resilient than those lower in polychronicity when it comes to not letting conflicts between their work and family lives affect how engaged they feel in their work.

Originality/value

This study extends the application of polychronicity to new domains of WFC and work engagement. The current study also contributed to the literature by investigating two measures of polychronicity (MPI and IPV) and finding that the MPI significantly moderated the relationship between WFC and work engagement, but the IPV did not. These findings indicate that there are important differences between the MPI and the IPV, and additional research is needed in comparing these two polychronicity measures.

Strategic predictors of performance in a divided attention task

In this study we investigate the strategies of subjects in a complex divided attention task. We conducted a series of experiments with ten participants and evaluated their performance. After an extensive analysis, we identified four strategic measures that justify the achievement of the participants, by highlighting the individual differences and predicting performance in a regression analysis using generalized estimating equations. Selecting the more urgent task and user action between multiple simultaneous possibilities form two of the strategic decisions, respectively. The third one refers to choosing a response within the same task when the opportunity is present. The fourth and most important measure of strategy involves thinking ahead and executing an action before a situation would become critical. This latter one has the effect of reducing later cognitive load or timing constraints and it is shown to explain almost as much variance in performance as the other three, more straightforward predictors together. In addition to determining these strategic predictors, we also show how manipulating task difficulty induces a shift in strategy, thus impairing human performance in the rehearsed task. The results of this study indicate that considerable differences in the divided attention ability of normal subjects can be identified early and with simple measurements. The importance of describing and analyzing strategies is also emphasized, which can substantially influence performance in complex tasks and may serve training needs.

Multitasking information behaviour in public libraries. A survey study

Multitasking information behaviour is the human ability to handle the demands of multiple information tasks concurrently. When we multitask, we work on two or more tasks and switch between those tasks. Multitasking is the way most of us deal with the complex environment we all live in, and recent studies show that people often engage in multitasking information behaviours. Multitasking information behaviours are little understood, however, and an important area of research for information behaviour research. Our study investigated the multitasking information behaviours of public library users at the Brentwood and Wilkinsburg Public Libraries in Pittsburgh through diary questionnaires. Findings include that some 63.5 percent of library users engaged in multitasking information behaviours, with a mean of 2.5 topic changes and 2.8 topics per library visit. A major finding of our study is that many people in libraries are seeking information on multiple topics and are engaged in multitasking behaviours. The implications of our findings and further research are also discussed.

In Search of the Relationship Between Polychronicity and Multitasking Performance

In this age of mobile technology, individuals find themselves constantly bombarded by competing demands, which often leads to multitasking. Although polychronicity (preference for multitasking) has been proposed to be a key predictor of multitasking performance, findings have in fact been mixed. This study proposes that self-control may moderate the effects of polychronicity on multitasking performance (i.e., trait self-control obscures the polychronicity-performance relationship). In 186 participants, compared to sequential task completion multitasking had a negative impact on task performance. Polychronicity was not found to be positively associated with task performance when multitasking, but there was a positive polychronicity-performance association among individuals with low self-control.

Media multitasking behavior: concurrent television and computer usage

Changes in the media landscape have made simultaneous usage of the computer and television increasingly commonplace, but little research has explored how individuals navigate this media multitasking environment. Prior work suggests that self-insight may be limited in media consumption and multitasking environments, reinforcing a rising need for direct observational research. A laboratory experiment recorded both younger and older individuals as they used a computer and television concurrently, multitasking across television and Internet content. Results show that individuals are attending primarily to the computer during media multitasking. Although gazes last longer on the computer when compared to the television, the overall distribution of gazes is strongly skewed toward very short gazes only a few seconds in duration. People switched between media at an extreme rate, averaging more than 4 switches per min and 120 switches over the 27.5-minute study exposure. Participants had little insight into their switching activity and recalled their switching behavior at an average of only 12 percent of their actual switching rate revealed in the objective data. Younger individuals switched more often than older individuals, but other individual differences such as stated multitasking preference and polychronicity had little effect on switching patterns or gaze duration. This overall pattern of results highlights the importance of exploring new media environments, such as the current drive toward media multitasking, and reinforces that self-monitoring, post hoc surveying, and lay theory may offer only limited insight into how individuals interact with media.