dorsal/arxiv
View SchemaModeling bursts and heavy tails in human dynamics
| Authors | A. Vazquez, J. Gama Oliveira, Z. Dezso, K. -I. Goh, I. Kondor, A. -L. Barabasi |
|---|---|
| Categories | |
| ArXiv ID | physics/0510117 |
| URL | https://arxiv.org/abs/physics/0510117 |
| DOI | 10.1103/PhysRevE.73.036127 |
| Journal | Phys. Rev. E 73, 036127 (2006) |
Abstract
Current models of human dynamics, used from risk assessment to communications, assume that human actions are randomly distributed in time and thus well approximated by Poisson processes. We provide direct evidence that for five human activity patterns the timing of individual human actions follow non-Poisson statistics, characterized by bursts of rapidly occurring events separated by long periods of inactivity. We show that the bursty nature of human behavior is a consequence of a decision based queuing process: when individuals execute tasks based on some perceived priority, the timing of the tasks will be heavy tailed, most tasks being rapidly executed, while a few experiencing very long waiting times. We discuss two queueing models that capture human activity. The first model assumes that there are no limitations on the number of tasks an individual can hadle at any time, predicting that the waiting time of the individual tasks follow a heavy tailed distribution with exponent alpha=3/2. The second model imposes limitations on the queue length, resulting in alpha=1. We provide empirical evidence supporting the relevance of these two models to human activity patterns. Finally, we discuss possible extension of the proposed queueing models and outline some future challenges in exploring the statistical mechanisms of human dynamics.
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"abstract": "Current models of human dynamics, used from risk assessment to\ncommunications, assume that human actions are randomly distributed in time and\nthus well approximated by Poisson processes. We provide direct evidence that\nfor five human activity patterns the timing of individual human actions follow\nnon-Poisson statistics, characterized by bursts of rapidly occurring events\nseparated by long periods of inactivity. We show that the bursty nature of\nhuman behavior is a consequence of a decision based queuing process: when\nindividuals execute tasks based on some perceived priority, the timing of the\ntasks will be heavy tailed, most tasks being rapidly executed, while a few\nexperiencing very long waiting times. We discuss two queueing models that\ncapture human activity. The first model assumes that there are no limitations\non the number of tasks an individual can hadle at any time, predicting that the\nwaiting time of the individual tasks follow a heavy tailed distribution with\nexponent alpha=3/2. The second model imposes limitations on the queue length,\nresulting in alpha=1. We provide empirical evidence supporting the relevance of\nthese two models to human activity patterns. Finally, we discuss possible\nextension of the proposed queueing models and outline some future challenges in\nexploring the statistical mechanisms of human dynamics.",
"arxiv_id": "physics/0510117",
"authors": [
"A. Vazquez",
"J. Gama Oliveira",
"Z. Dezso",
"K. -I. Goh",
"I. Kondor",
"A. -L. Barabasi"
],
"categories": [
"physics.soc-ph",
"cs.MA"
],
"doi": "10.1103/PhysRevE.73.036127",
"journal_ref": "Phys. Rev. E 73, 036127 (2006)",
"title": "Modeling bursts and heavy tails in human dynamics",
"url": "https://arxiv.org/abs/physics/0510117"
},
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