Gijsbert Stoet









In the news

On the 19th of January 2012, I was on BBC's Today programme to talk about my latest research:
Click here to play MP3 sound file (This audio file is a more complete than the BBC audio clip).
The Today programme is the BBCs flagship news and current affairs programme broadcast weekdays from 6am to 9am.


In the Guardian: Women and the maths problem.
A commentary by Helen Powell. The Guardian is one of the UK's major newspapers.


In the Telegraph: It is not just conservatives who shy away from science.
A commentary by Ed West. The Telegraph is one of the UK's major newspapers.


In the Yorkshire Post: Will women and men ever add up to equals in maths?
An article Sheena Hastings.


In The Riverfront Times: If Girls Think Math is Hard, Researchers Find Science is Even Harder
A commentary by Aimee Levitt.


In the The Chronicle of Higher Education: Stereotypes do not explain gender differences in math, study argues.
A commentary by Dan Berrett. The Chronicle is a large news source for academia in the USA.


On ScienceDaily:
'Women Worse at Math Than Men' Explanation Scientifically Incorrect, Experts Say..
ScienceDaily is a popular science news website founded by science writer Dan Hogan in 1995.


On Psych Central:
Stereotypes of women do not explain behavior.
A commentary by Dr. Rick Nauert.


In Heise Online: Warum erzielen Frauen weniger Spitzenleistungen in der Mathematik? [Why are there fewer top achievements in Mathematics by women?]
A commentary by Florian Rötzer. Heise Online is a popular German technology magazine.


On Leiweb: AttualitĂ  anche le donne hanno i numeri.
Commentary in Italian.


You can watch a short 6 minute YouTube video about our research here:


The summary (abstract) of the paper Can stereotype threat explain the gender gap in mathematics performance and achievement?:

Men and women score similarly in most areas of mathematics, but a gap favoring men is consistently found at the high end of performance. One explanation for this gap, stereotype threat, was first proposed by Spencer, Steele, and Quinn (1999) and has received much attention. We discuss merits and shortcomings of this study and review replication attempts. Only 55% of the articles with experimental designs that could have replicated the original results did so. But half of these were confounded by statistical adjustment of preexisting mathematics exam scores. Of the unconfounded experiments, only 30% replicated the original. A meta-analysis of these effects confirmed that only the group of studies with adjusted mathematics scores displayed the stereotype threat effect. We conclude that although stereotype threat may affect some women, the existing state of knowledge does not support the current level of enthusiasm for this as a mechanism underlying the gender gap in mathematics. We argue there are many reasons to close this gap, and that too much weight on the stereotype explanation may hamper research and implementation of effective interventions.

Research interests

Together with colleagues and students, I study different aspects of our thinking. Most of this work focuses on cognition and attention, but also includes health and social psychology. We use a number of different methods (behavioural and neuroscientific), and study different groups of people, including children. Most of my past and present research has been funded with grants from the NIH, German Science Foundation (DFG), Max-Planck-Society, James S. McDonnell Foundation, British Academy, and Nuffield Foundation, and I would like to thank the funding organisations and collaborators for their support. In the publication section, you can find a variety of articles that resulted from these grants.

Currently, we use primarily mental chronometry to characterise how children and adults coordinate cognitive processes, and how cognitive processes determine short term and longer term decision making. Example questions are: How do people manage to multi-task, and why are some people better at it than others? How do people deal with conflicting information? Do cognitive processes in men and women differ? What are the implications of gender differences in thinking for important decisions, such as career planning? How can gender differences in thought and behaviour be explained using evolutionary models? How do animal and human cognitive abilities compare? How do cognitive abilities develop in children and teenagers? How does people's capacity to control themselves help them to live more healthily? What is the relationship between thinking style and personality?

Altogether, the work in my lab is highly interdisciplinary and I continue to collaborate with colleagues around the world in different areas of psychology, neuroscience, and computer science. If you are interested in any aspect of this research, if you would like to collaborate, or if you would like to study at the University of Leeds (e.g., for a MSc or PhD), please do not hesitate to email me.

Current students involved in research projects

Kara Gray, Caroline Allen, Amy Fretten, Georgina Cook, Natalie Retter, Emily Inston, Lewis O'Sullivan, Emma Johnstone.

CV

Education
1996-1998PhD. Psychology Summa Cum Laude, Max-Planck-Institute for Psychological Research and Ludwig Maximilians University (Munich, Germany)
Thesis: The role of feature integration in action planning
Adviser: Bernhard Hommel
1989-1993M.A. Psychology, University of Groningen (The Netherlands)
Thesis: Natural language processing in neural networks
Advisers: Gerhard Dalenoort and Hans Strohner

Academic institutions
2007-presentUniversity of Leeds (UK)
2006-2007University of the West of England (UK)
1998-2006Washington University in St.Louis (USA)
1996-1998Max-Planck-Institute for Psychological Research (Munich, Germany)
1993-1995University of Bielefeld (Germany)

Current administrative roles
- Member of the University of Leeds Equality and Diversity Committee
- Member of the Faculty Research Ethics Committee
- Chair of Departmental Ethics Committee


Publications

cover jns

Can stereotype threat explain the gender gap in mathematics performance and achievement?
Stoet, G. & Geary, D. C. (2012). Review of General Psychology.
[watch video]. Published as Online First version (paper print forthcoming).

The role of executive control in tool use (commentary)
Stoet, G. & Snyder, L.H. (in press). Behavioral and Brain Sciences.

Sex differences in search and gathering skills
Stoet, G. (2011). Evolution and Human Behavior, 32, 416-422.
[download pdf]

Task switching abilities in children with autism spectrum disorder
Stoet, G. & López, B. (2011). European Journal of Developmental Psychology, 8, 244-260.
[download pdf]

PsyToolkit - A software package for programming psychological experiments using Linux
Stoet, G. (2010). Behavior Research Methods, 42(4), 1096-1104.
[download pdf]

Sex differences in the processing of flankers
Stoet, G. (2010). Quarterly Journal of Experimental Psychology, 63 (4), 633-638.
[download pdf]

Neural correlates of executive control functions in the monkey
Stoet, G. & Snyder, L.H. (2009). Trends in Cognitive Sciences, 13, 228-234.
[download pdf]

Modification of response time variability in a decision-making task
Stoet, G., Ruge, H., & Snyder, L.H. (2008). Neuroreport, 19, 1321-1324.
[download pdf]

Dyslexia and attentional shifting
Stoet, G., Markey, H., & López, B. (2007). Neuroscience Letters, 427, 61-65.
[download pdf]

Task-switching in human and non-human primates: Understanding rule encoding and control from behavior to single neurons
Stoet, G. & Snyder, L.H. (2007).
In S.A. Bunge and J.D. Wallis (Eds.), pp. 227-254. The Neuroscience of Rule-Guided Behavior. Oxford University Press.

Extensive practice does not eliminate human switch costs
Stoet, G. & Snyder, L.H. (2007). Cognitive, Affective, & Behavioral Neuroscience, 7(3), 192-197.
[download pdf]

Correlates of stimulus-response congruence in posterior parietal cortex (PPC)
Stoet, G. & Snyder, L.H. (2007). Journal of Cognitive Neuroscience, 19, 194-203. [see cover right]
[download pdf]

Effects of the NMDA antagonist ketamine on task-switching performance: evidence for specific impairments of executive control
Stoet, G. & Snyder, L.H. (2006). Neuropsychopharmacology, 31, 1675-1681.
[download pdf]

Attentional set mixing: effects on target selection and selective response activation
Ruge, H., Stoet, G., & Naumann E. (2006). Psychophysiology, 43, 413-421.
[download pdf]

Single neurons in posterior parietal cortex (PPC) of monkeys encode cognitive set
Stoet, G. & Snyder, L.H. (2004). Neuron, 42, 1003-1012.
[download pdf]

Click here to read David J. Freedman's introduction to this publication in the same issue of Neuron.

Executive control and task-switching in monkeys
Stoet, G. & Snyder, L.H. (2003). Neuropsychologia, 41, 1357-1364.
[download pdf]

Task preparation in macaque monkeys (Macaca mulatta)
Stoet, G. & Snyder, L.H. (2003). Animal Cognition, 6, 121-130
[download pdf]

Interaction between feature binding in perception and action
Stoet, G. & Hommel, B. (2002). In W.Prinz & B.Hommel (Eds.). Common mechanisms in perception and action: Attention and Performance, Vol. XIX (pp. 538-552). Oxford: Oxford University Press.
[download pdf]

Action planning and the temporal binding of response codes
Stoet, G. & Hommel, B. (1999). Journal of Experimental Psychology: Human Perception and Performance, 25, 1625-1640.
[download pdf]

The role of feature integration in action
Stoet, G. (1998). Dissertation. Munich, Germany.

Cognitive Compositionality: An Activation and Evaluation Hypothesis
Strohner, H. & Stoet, G. (1999). In M.K. Hiraga, C. Sinha & S.Wilcox (Eds.), Cultural, Psychological and Typological Issues in Cognitive Linguistics (pp. 195-209). Amsterdam: John Benjamins Publishing Co.

Kognitive Modellierung semantischer Kompositionalität
Strohner, H. & Stoet, G. (1994). Sprache und Datenverarbeitung, 18, 45-64.

Interferenzprozesse bei Adjektiv-Nomen-Kompositionen
Strohner, H. & Stoet, G. (1996). Sind geschälte Äpfel eher weiß als rund? In C.Habel, S.Kanngießer & G.Rickheit (Eds.), Perspektiven der Kognitiven Linguistik:Modelle und Methoden (pp. 233-255). Opladen:Westdeutscher Verlag.


Selection of abstracts

Sex differences in visual search performance seem incompatible with the hunter/gatherer hypothesis
Stoet, G. (2010).
Annual Meeting of the Psychonomic Society. St.Louis (USA).

Using Linux for programming and running cognitive experiments and questionnaires
Stoet, G. (2010).
Annual Meeting of the Society for Computers in Psychology. St.Louis (USA).

Comparing task-switching costs in children and adults - methodological issues and data
Stoet, G. (2010).
Annual Meeting of the Cognitive Section of the British Psychological Society. Cardiff.

Response time variability in choice response time tasks and tapping tasks correlates positively
Stoet, G. & Gray, K.(2010).
Joint Conference of the EPS and SEPEX. Granada.

Task switching, inhibition, and executive control in children with autism
Stoet, G. & López, B. (2010).
Joint Conference of the EPS and SEPEX. Granada.

Task switching in children with autism
López, B. & Stoet, G. (2008).
International Meeting for Autism Research (IMFAR). London.

Human performance in repetitive tasks
Stoet, G., Ruge. H. & Snyder, L.H. (2007).
Joint meeting of the EPS and Psychonomics Society. Edinburgh.

Switch costs in humans persist even after extensive training.
Stoet, G. & Snyder, L.H. (2005).
Annual meeting of the Psychonomic Society. Toronto.

A model of effects of ketamine, a NMDA glutamatergic antagonist, on executive control in monkeys.
Stoet, G. & Snyder, L.H. (2005). Schizophrenia Bulletin, 31(2), 311-311.
International Congress on Schizophrenia Research (ICOSR). Savannah.

Effects of conflicting stimuli on neurons in posterior parietal cortex (PPC).
Stoet, G. & Snyder, L.H. (2004).
Annual meeting of the Society For Neuroscience. San Diego.

Effects of task interference on neurons in the posterior parietal cortex (PPC).
Stoet, G. & Snyder, L.H. (2004).
Annual meeting of the Psychonomic Society. Minneapolis.

Additive factor logic used to reveal monkey preparation strategy in a task-switching paradigm.
Stoet, G. & Snyder, L.H. (2003).
Annual meeting of the Psychonomic Society. Vancouver.

Software

PsyToolkit

PsyToolkit is an open-source software package for creating and running psychological experiments using the Linux operating system. I have developed this software over a period of more than 5 years, and it is compatible with a range of hardware (e.g., Cedrus and IOLab response pads, various digital input/output boards). Currently, PsyToolkit is used around the world in many different settings, from research laboratories to applied psychological settings. Click here to learn more about the software.

PsyToolkit can also be used for teaching with any type of computer platform. There is an online set of lessons with demonstrations of a number of popular paradigms in cognitive psychology, including visual search, stimulus-response compatibility, attentional cuing, inhibition of return, attentional blink, Fitts's Law, and mental rotation. One of the main advantages of the lessons is that students can study them from home, because all software being used is free. The demonstrations run on all computer platforms as Java applications (that is, not just on Linux). Click here to directly go to the lessons.

Publications about PsyToolkit:

PsyToolkit - A software package for programming psychological experiments using Linux
Stoet, G. (2010). Behavior Research Methods, 42(4), 1096-1104.
[download pdf]

PsyToolkit Manual
Stoet, G. (2010). Leeds University, Leeds.
[download pdf]

PsyToolkit
Stoet, G. (2011). Newsletter of the Higher Education Academy, 60, 14.
[download pdf of whole issue, contribution is on page 14]

Personal

Gijsbert feeding ducks at the Leeds-Liverpool
 canal. In my spare time, I am active in a number of local and national societies. Further, I enjoy a variety of completely different things, including computer programming, travel, hiking, and watching Coronation Street.










Name pronounciation

My Dutch name has an English counterpart. In fact, English and Dutch have similar origins, and many English names have a Dutch version. The English equivalent of the Dutch "Gijsbert" is "Gilbert". If you would like to know how to pronounce my name in Dutch, click here to listen to a sound file.

Relevant Links:

Page last updated: 24/January/2012