Fellow Publications

Fellow Publications

Reuben Ng at Yale

Reuben Ng

Integrating psychometric and cultural theory approaches to formulate an alternative measure of risk perception

Reuben Ng and Steve Rayner
Innovation: The European Journal of Social Science Research
Online publication date: 27 October 2010

Reuben Ng (S&T ’09) was recently published in Innovation: The European Journal of Social Science Research.

The paper critiques current methods of measuring risk perceptions and proposes a novel way.  A widely accepted method (psychometric approach) asks a person to consider the risk of dying for a variety of items like terrorism, railroad collisions, aspirins, caffeine, etc., in the hope of predicting human behavior.

We argue that there are two limitations.  The first limitation is that attitude measurements captures only static thoughts and may not be a good predictor of behavior and the other is that terrorism and railroad collisions will evoke thoughts of death but caffeine and aspirins usually will not.  Psychologists found that death thoughts make a person more conservative and identify strongly with individual cultural values.  This is problematic because death thoughts will affect answers to some questions but not others.  Against this background, current methods of measuring the risk perceptions of a person may not be accurate.  Drawing from new developments in Industrial Organizational Psychology, we propose the use of Situational Judgment Tests (SJTs).  SJTs solicit anticipated behavior in risky scenarios and measures the dynamic nature of one’s thinking rather than static attitudes in previous measures.  Steps to designing an SJT are outlined and followed through to culminate in a 10-item SJT that measures risk perception.

Reuben has also been featured in a few additional publications and can be heard on a podcast.

He is featured as one of three Yale students featured in Nanyang Sin-Chew Lianhe Zaobao, a major newspaper in Singapore, about his experience at Yale and reaction to Yale’s opening of a branch campus in Singapore. The article is in Chinese and a translation will be posted shortly.

Reuben spoke about his research and the Fulbright S&T Award during an interview on the radio talk show "Passion People" that featured tennis star Michael Chang and renowned primate researcher Dr. Jane Goodall among its many guests.  In that I spoke about my research and talked about the Fulbright Science and Technology award. Click here to listen to the podcast of the show.

Finally, he was featured in a Yale Graduate School newsletter (see p.6)

Martin Petricic

Martin Petricic

Wave induced extreme hull girder loads on containerships

J. Juncher Jensen (V, Corresponding Author), Preben Terndrup Pedersen (FL), Bill Shi (V), Sue Wang (M), Martin Petricic (V), Alaa E. Mansour (FL)

This paper provides simple but rational procedures for prediction of extreme wave – induced sectional hull girder forces with reasonable engineering accuracy. The procedures take into account main ship hull characteristics such as: length, breadth, draught, block coefficient, bow flare coefficient, forward speed and hull flexibility. The vertical hull girder loads are evaluated for specific operational profiles. Firstly a quadratic strip theory is presented which can give separate predictions for the hogging and sagging bending moments and shear forces and for hull girder loads. Then this procedure is used as a base to derive semi-analytical formulas such that approximate wave load calculations can be performed by a simple spreadsheet program. Due to the few input parameters this procedure can be used to estimate the wave-induced bending moments at the conceptual design phase. Since the procedure is based on rational methods it can be applied for novel single hull ship types not presently covered by the rules of the classification societies or to account for specific operational profiles.


Bridge to Somewhere

In the November issue of Nature magazine, Science & Technology fellows Delgerjargal Dugarjav and Martin Petricic discuss their motivations for pursuing PhD studies in the U.S., provide advice about how to meet the academic and cultural challenges that international students face while studying far from home, and share what they hope to accomplish in the future.