Digital Commons Network^™

Optimizing And “Pessimizing”: Human Performance With Instructional Variants Of The Traveling Salesperson Problem, Edward Chronicle, James Macgregor, Thomas Ormerod

The Journal of Problem Solving

The two-dimensional Traveling Salesperson Problem (TSP) requires finding the shortest tour through n locations. Untrained adults are adept at the task, and reliably outperform simple construction algorithms for n up to 60. Performance may stem from a specific, inherent ability. Alternatively, it may reflect general spatial intelligence, whether inherent or acquired. If the latter holds, then people should be equally adept at finding longest tours. Two experiments comparing ability in the two tasks found participants significantly better at finding short than long tours. Furthermore, human performance was significantly worse than a simple construction algorithm (furthest-neighbor) for the task of finding …

The Cognitive Psychology Of Circumstantial Evidence, Kevin Jon Heller

Michigan Law Review

Empirical research indicates that jurors routinely undervalue circumstantial evidence (DNA, fingerprints, and the like) and overvalue direct evidence (eyewitness identifications and confessions) when making verdict choices, even though false-conviction statistics indicate that the former is normally more probative and more reliable than the latter The traditional explanation of this paradox, based on the probability-threshold model of jury decision-making, is that jurors simply do not understand circumstantial evidence and thus routinely underestimate its effect on the objective probability of the defendant's guilt. That may be true in some situations, but it fails to account for what is known in cognitive psychology …

A Hybrid Scatter Search/Electromagnetism Meta-Heuristic For Project Scheduling, Dieter Debels, Bert De Reyck, Roel Leus, Mario Vanhoucke

Research Collection Lee Kong Chian School Of Business

In the last few decades, several effective algorithms for solving the resource-constrained project scheduling problem have been proposed. However, the challenging nature of this problem, summarised in its strongly NP-hard status, restricts the effectiveness of exact optimisation to relatively small instances. In this paper, we present a new meta-heuristic for this problem, able to provide near-optimal heuristic solutions for relatively large instances. The procedure combines elements from scatter search, a generic population-based evolutionary search method, and from a recently introduced heuristic method for the optimisation of unconstrained continuous functions based on an analogy with electromagnetism theory. We present computational …

Confronting Conventional Thinking: The Heuristics Problem In Feminist Legal Theory, Nancy Levit

Nancy Levit

The thesis of The Heuristics Problem is that the societal problems about which identity theorists are most concerned often spring from and are reinforced by thinking riddled with heuristic errors. This article first investigates the ways heuristic errors influence popular perceptions of feminist issues. Feminists and critical race theorists have explored the cognitive bias of stereotyping, but have not examined the ways probabilistic errors can have gendered consequences. Second, The Heuristics Problem traces some of the ways cognitive errors have influenced the development of laws relating to gender issues. It explores instances in judicial decisions in which courts commit heuristic …

Heuristics For Batching Jobs Under Weighted Average Completion Time, Lewis A Raymond

UNLV Retrospective Theses & Dissertations

Batching problems are machine scheduling problems, where a set of jobs with given processing requirements has to be scheduled on a single machine. The set of jobs has to be partitioned into subsets to form a sequence of batches. A batch combines jobs to run jointly, and each job's completion time is defined to be the completion time of the entire batch. For a batching problem, it is also assumed that when each batch is scheduled, it requires a setup time. One seeks to find a schedule that minimizes the total weighted completion time; This problem is NP-complete, but the …

Depression, Volition, And Death: The Effect Of Depressive Disorders On The Autonomous Choice To Forgo Medical Treatment, Matthew Butkus

Electronic Theses and Dissertations

Many contemporary models of medical ethics champion patient autonomy to counterbalance historically paternalistic decision-making processes. These models tend to suggest an autonomous agent free from cognitive bias and systematic distortion (e.g., Kantian or Cartesian rational agents). Evidence is emerging from the fields of cognitive psychology, cognitive science, and neuroscience that fundamentally challenge this cognitive model, demonstrating the dependence of cognition on deeper, avolitional structures (e.g., backstage cognition, cognitive heuristics and biases, automaticity, emotionally-valenced memory, etc.), and hence, shifting the cognitive model towards reductionistic and deterministic philosophies and psychologies. Medical ethics models must adapt their sense of autonomy in light of …

It’S Not About The Money: The Role Of Preferences, Cognitive Biases And Heuristics Among Professional Athletes, Michael Mccann

Law Faculty Scholarship

Professional athletes are often regarded as selfish, greedy, and out-of-touch with regular people. They hire agents who are vilified for negotiating employment contracts that occasionally yield compensation in excess of national gross domestic products. Professional athletes are thus commonly assumed to most value economic remuneration, rather than the love of the game or some other intangible, romanticized inclination.

Lending credibility to this intuition is the rational actor model, a law and economic precept which presupposes that when individuals are presented with a set of choices, they rationally weigh costs and benefits, and select the course of action that maximizes their …

Social Psychology, Calamities, And Sports Law, Michael Mccann

Law Faculty Scholarship

This Article examines the role of situational pressures, fundamental attribution errors, and legal frameworks in how professional sports actors respond to the threat and occurrence of calamities. Both natural and manmade threats to American health are likely to rise over the next decade. Such threats may include catastrophic weather, natural disasters, terrorist attacks, and communicable disease pandemics. In response to these threats, professional sports leagues, professional athletes, fans, and media might engage in unprecedented behavior. Consider, for instance, increasingly-devastating weather patterns, and how they might animate leagues to relocate franchises to cities with more favorable forecasts. The same outcome might …

A Dynamic Heuristic For The Stochastic Unrelated Parallel Machine Scheduling Problem, Jean-Paul Arnaout, Ghaith Rabadi, Ji Hyon Mun

Engineering Management & Systems Engineering Faculty Publications

This paper addresses the problem of batch scheduling in an unrelated parallel machine environment with sequence dependent setup times and an objective of minimizing the total weighted mean completion time. The jobs' processing times and setup times are stochastic for better depiction of the real world. This is a NP-hard problem and in this paper, new heuristics are developed and compared to existing ones using simulation. The results and analysis obtained from the computational experiments proved the superiority of the proposed algorithm PMWP over the other algorithms presented.

Confronting Conventional Thinking: The Heuristics Problem In Feminist Legal Theory, Nancy Levit

Faculty Works

The thesis of The Heuristics Problem is that the societal problems about which identity theorists are most concerned often spring from and are reinforced by thinking riddled with heuristic errors. This article first investigates the ways heuristic errors influence popular perceptions of feminist issues. Feminists and critical race theorists have explored the cognitive bias of stereotyping, but have not examined the ways probabilistic errors can have gendered consequences. Second, The Heuristics Problem traces some of the ways cognitive errors have influenced the development of laws relating to gender issues. It explores instances in judicial decisions in which courts commit heuristic …

Anchoring, Information, Expertise, And Negotiation: New Insights From Meta-Analysis, Chris Guthrie, Dan Orr

Vanderbilt Law School Faculty Publications

In this article, we conduct a meta-analysis of studies of simulated negotiations to explore the impact of an initial "anchor," typically an opening demand or offer, on negotiation outcomes. We find that anchoring has a significant impact on the deals that negotiators reach. We also explore whether negotiator experience and the information environment mitigate the influence of anchoring. We conclude by offering prescriptive advice, both "offensive" and "defensive," to negotiators.

The Dangers And Drawbacks Of The Disclosure Antidote: Toward A More Substantive Approach To Securities Regulation, Susanna K. Ripken

Susanna K. Ripken

This article analyzes and critiques the federal securities laws' reliance on disclosure as the primary method of protecting investors and regulating the securities markets. Since the inception of the federal securities law seventy years ago, the policy has always been that, as long as corporations disclose all material information about their operations and their stock, public investors can make their own informed investment decisions. The unprecedented number of corporate frauds, scandals, and bankruptcies in recent years has revealed weaknesses in the traditional disclosure strategy of regulation. Disclosure rules did not protect American investors from the damages they suffered when large …