Monday, 10 March 2014

Stop-Signal Task: Methods, Statistics, and Applications.

The School of Psychology is proudly hosting a talk by Dr. Dora Matzke,
Department of Psychological Methods, University van Amsterdam. See
the attached flyer for details, including:

TITLE: A Bayesian parametric approach for the estimation of stop-signal
reaction time distributions.

WHEN & WHERE: Thursday 13th March 12-1pm, AVLG17 (videoconferenced to room AV3 in Ourimbah).

ABSTRACT: The cognitive concept of response inhibition is frequently measured using the stop-signal paradigm. In this paradigm, participants perform a two-choice reaction time task where, on some of the trials, the primary task is interrupted by a stop-signal that instructs participants to withhold their response. The dependent variable of interest is the latency of the unobservable stop response (stop signal reaction time or SSRT). Recently, Matzke, Dolan, Logan, Brown and Wagenmakers (2013) have developed a Bayesian parametric approach that allows for the estimation of the entire distribution of SSRTs. The Bayesian parametric approach is based on the assumptions of the horse race model and rests on the concept of censored distributions. The method assumes that SSRTs are ex-Gaussian distributed and uses Markov chain Monte Carlo sampling to obtain posterior distributions for the model parameters. First, I will illustrate the use of the Bayesian parametric approach with published stop-signal data. I will then introduce BEESTS, a user-friendly software implementation of the Bayesian parametric approach that can be applied to individual as well as hierarchical data structures. I will conclude by discussing possible extensions and future research directions.

Monday, 16 December 2013

PRESENTATION: The neuroscience of attention, by Dr. Søren Kyllingsbæk (Copenhagen). Thursday 19th December 10:30am-11:30am



The School of Psychology is proudly hosting a talk by Dr. Søren Kyllingsbæk, Department of Psychology, University of Copenhagen.  If you're interested in meeting with Dr. Kyllingsbæk while he visits Newcastle, please email Dr. Ami Eidels (ami.eidels@newcastle.edu.au).


TITLE: A Neural Theory of Visual Attention

WHERE: Keats Reading room (Aviation Building, AVLG17).

WHEN: Thursday 19th December 2013, 10:30am-11:30am.

ABSTRACT: The neural theory of visual attention (NTVA) developed by Bundesen, Habekost, and Kyllingsbæk (2005) is a neural interpretation of Bundesen’s (1990) theory of visual attention (TVA). The theory accounts both for a wide range of attentional effects in human performance (reaction times and error rates) and for a wide range of effects observed in firing rates of single cells in the primate visual system. NTVA provides a mathematical framework to unify the two fields of research—formulas bridging cognition and neurophysiology. I will present NTVA and related new theoretical ideas regarding visual encoding and visual short-term memory.

Wednesday, 11 December 2013

JUST PUBLISHED: Personal Qualities Assessment Across Cultures

Myself (Miles Bore), Don Munro and David Powis have spent the last 15 years developing and testing personality questionnaires and ability tests for use in the selection of medical students. While much of the focus of our research has been the use of these tests in Australia and the UK, we have also had opportunities to trial the tests in countries where English is not the first language such as Sweden, Israel, Japan, Taiwan, Nepal and Fiji. Recently we were approached by Saharnaz Nedjat from Tehran University of Medical Sciences asking if we would be interested in running the Personal Qualities Assessment tests with her in Iran. We leapt at the chance of course!

We emailed three tests to Tehran for translation into Persian: the Mental Agility Test (a 48-item high powered IQ test), the Mojac Moral Orientation Scale and our Self-Appraisal Inventory which measures the personality traits of Involvement (being empathic, confident with others and not aloof or narcissistic), Resilience (being emotionally stable and not neurotic) and Self-Control (being conscientious and not disorderly). The tests were then back-translated into English so we could check that all 240 questions in the battery, not to mention the instructions for each test, had maintained their original meaning: quite a detailed job! After checking back and forth with Saharnez on a handful of questions that were proving difficult to translate we finally had it all sorted. The real test of this was whether the tests actually worked when given to applicants in Tehran.

The tests were administered to a cohort of medical students at Tehran and the findings reported in a recently published article for the journal Medical Teacher. While the article presents only basic analysis (mean differences between students who entered directly from secondary education compared to those who entered with a tertiary degree) it is the finding that the tests performed reliably when translated into Persian that pleased us most. More detail on that and other cross-cultural comparisons are for another paper.

For more details, please see the following journal article:
Nedjat, S., Bore, M., Majdzadeh, R., Rashidian, A., Munro, D., Powis, D., Karbakhsh, M., & Keshavarz, H. (2013). Comparing the cognitive, personality and moral characteristics of high school and graduate medical entrants to the Tehran University of Medical Sciences in Iran Medical Teacher, 35 (12), 1632-1637 DOI: 10.3109/0142159X.2013.826791

Further information can be found at the Personal Qualities Assessment website: http://www.pqa.net.au/

Wednesday, 20 November 2013

SYNERGY BETWEEN UON SCHOOL OF PSYCHOLOGY AND HNE HEALTH MAKES A GREAT 2013 PSYCHOLOGY PROFESSIONAL DAY


On Friday 15th November, UoN School of Psychology successfully hosted and co-organised with Hunter New England Health the biggest Psychology Professional Day in the Hunter in history. More than 230 psychologists gathered together on campus from the Health Service (50%), the University (20%), private practice (15%), government agencies (14%) and NGOs (2%) for a day of professional development on promoting clinical excellence and culturally respectful practices.

Aboriginal psychology was the key theme of this year’s conference. The key note speaker Professor Judy Atkinson has been a ‘big draw’ card for this year’s conference. She is a very experienced and respected clinician and academic in the area of working with Indigenous clients, particularly children who have experienced trauma. She has an extensive track record in research on transgenerational trauma, which the school has actively incorporated in its undergraduate curriculum for first year psychology students since 2011.

The key note speaker: Prof Judy Atkinson

Several members of staff, postgraduate, and undergraduate students attended and played an active role in the day. Stuart Marlin and Sean Halpin welcomed the conference delegates on behalf of the school and psychology clinic at the beginning of the day. Stefania Paolini, as active member of the conference organising committee, acted as a key conduit between HNE and UoN; on the day she convened a stimulating symposium on Newcastle-led research on Aboriginal wellbeing with Dr Mark Lock and Dr Jo Gwynn from the Centre for Rural and Remote Mental Health Research which has attracted the participation of a group of very diverse researchers from a variety of disciplinary areas. Sean Halpin has run a well-attended interactive workshop on assessment and diagnosis and Tony Kemp has offered continuous AV assistance on the lead to the conference and on the day and assisted a long list of speakers and workshop facilitators involved n the day. 

The conference showcased the great talent of psychologists we have locally, demonstrated the varied areas of clinical excellence in practice, and stressed the importance of effective interaction between educators in the school, psychologists working in the community, and the needs of culturally diverse clients.

This year’s event has been a nice demonstration of the psychologists from HNE Health service and The University of Newcastle working together. We look forward to newer opportunities in the future!