Thursday, February 24, 2011
DIEM and thanks for all the hits
Monday, February 14, 2011
Guest blog on davidbordwell.net
There Will Be Blood + eye movement peekthrough from TheDIEMProject on Vimeo.
Monday, February 07, 2011
Bordwell on Eyes
Wednesday, October 27, 2010
Horizon - Is seeing believing?
BBC TWO in the UK broadcast a wonderful factual programme on sensory illusions (Horizon, 9pm, 18/10/10). The programme covered many well known sensory illusions such as the McGurk effect, multimodal illusions such as the effect of sound and colour on taste perception, magic tricks such as Gustav Kuhn's disappearing ball illusion, and the perceptual completion of impossible figures. If you are interested in sensory illusions the programme provides a nice, succinct introduction. The programme also goes on to talk about the science of illusions and how illusions allow us to understand the cognitive processes and neurology of perception.
The programme also introduced the phenomenon of Synaesthesia in which perception through one modality (e.g. vision) triggers perceptual experiences in another modality (e.g. taste). We all have some synaesthetic experiences such as smells triggering specific visual memories but for people with more developed synaesthesia these cross-modal percepts are richer and more complex. Synaesthesia is a fascinating research area which up until a few years ago was dismissed by the Psychological research community as hokum. Thankfully a new generation of researchers such as Jules Simner (Edinburgh) have used clever behavioural measures combined with neuroimaging to show that synaeasthesia is a real phenomena and one which can seriously advance our understanding of sensory perception.
Viewers in the UK can catch the programme on the BBC iPlayer:
For other recent public presentations of sensory illusions see the work of Susanna Martinez-Conde (Barrow institute), the special issue of Scientific American, and the Illusion of the Year contest at the Vision Sciences Society annual meeting.
Discontinuity Boy
My new contact details are :
Tim J. Smith, Ph.D.
Lecturer
Rm 501d
Department of Psychological Sciences
Birkbeck, University of London
Malet Street,
London WC1E 7HX
Tel: +44(0)20 7631 6503
Fax: +44 (0)20 7631 6312
e-mail: tj.smith@bbk.ac.uk
url: http://www.bbk.ac.uk/psyc/staff/academic/tsmith
Don't worry, this does not signify the end of 'Continuity Boy'. Far from it. I will continue updating this research blog and I look forward to regaling you with details of the research coming out of my lab.
Tuesday, August 03, 2010
Amsterdam PhD Position Opening Absorption in Film Viewing
>>>
The Amsterdam School for Communications Research currently have a four year PhD vacancy.
We are looking for a researcher who has knowledge of (cognitive) theories of narrative and film and wants to study experiential states in film viewers. Experience in psychological experimentation is also absolutely necessary. Interest in manufacturing film materials for the experiments is a recommendation.
A scholarship sufficient for costs of living and tuition is related to the position.
Please pass this announcement on to potential candidates. Deadline for applications is Sept. 12 2010. For details, applications and all correspondence see:
http://www.ascor.uva.nl/vac4.html
Ed Tan
Amsterdam School for Communications Research
Wednesday, May 26, 2010
The other type of continuity
Thursday, May 13, 2010
Cannes 2010!!
Greetings from the Cannes Film Festival 2010! After years of eagerly reading about all the gossip, film news, and screenings at Cannes I finally got the opportunity to attend the festival. Friends Calum Waddell and Naomi Holwill from new Edinburgh based production company, High Rising Productions (http://www.highrisingproductions.com/) asked me to join them on their Cannes experience and help out promoting some new film projects. How could I resist! Wednesday, February 17, 2010
New Scientist and the 1/f structure in film editing
Monday, September 28, 2009
Bang! – The science behind the show
In our segment on Bang Goes the Theory (Mon 28th Sept 7:30pm BBC 1; catch it on BBC iPlayer if you missed it) Peter Lamont and I discussed some of the everyday psychological phenomenon used by magicians to fool our perception and create illusions. There were two main phenomena demonstrated in the piece: Inattentional Blindness and Change Blindness. If you want to try the change blindness test used in the show for yourself skip down to the 'Now its your turn!' section below.
Inattentional Blindness
In the piece, Peter demonstrated how a magician can make an object seem to disappear by controlling where you are looking. We have the impression that we see all of the visual world in great detail at the same time because as soon as we turn our attention to an object in the world we can see it. However, this is an illusion created by our brains to overcome the limitations of our eyes. Our eyes are actually only able to pick out visual detail from a very small portion of the world at any one moment. This is because the light sensitive surface at the back of the eye, known as the retina, has the greatest concentration of cells in a small region around its centre, known as the fovea. The light landing on the fovea comes from a region out in the world roughly the size of your thumb nail held out at arm’s length. When we look at an object we move our eyes so that the light reflected off an object lands on the fovea. The light reflected off objects away from the centre of our attention land on less sensitive parts of the eye resulting in a lower quality image. We may have the impression that we can see everything but in reality if our eyes are not pointing at an object all we can see is a blurry image with poor definition.
However, because we move our eyes on average 3-5 times every second our brains use all the information we get across this sequence of fixations (when the eyes are still) to piece together a detailed impression of the world. Our perception of the world is constructed over time from minimal detail and we assume that we see more than we actually do. This assumption is used by magicians to make you think that if you didn’t see something happen, such as a ball being pocketed, then it didn’t happen!
In the Bang! piece, Peter uses misdirection to ensure that you are not looking at the hand which is hiding the object. He does this by using cues to encourage you to look elsewhere. These cues may involve a sudden flourish of a hand, the waving of a wand, directing his eyes to an object, his posture and referring to an object by name. All of these cues direct our attention to one object whilst misdirecting us from the hand actually performing the trick. Social cues such as these are so powerful and we respond to them so consistently that magicians are able to reliably influence the attention of individuals or entire audiences. The result is that we are blind to the method of the trick because we failed to attend to it. The most famous inattentional blindness demonstration is Simon’s & Chabris ‘Gorillas in our Midst' experiment in which they made viewers fail to notice a person in a gorilla suit by focussing viewer attention on basketball players in the same scene. For a demonstration of the Simon’s & Chabris demonstration and a similar magic trick utilising inattentional blindness see the Colour Changing Card Trick we previously described on this blog.
For further discussion of the use of natural inattentional blindness phenomenon used by magicians see Peter’s book and article below.
Lamont, P. & Wiseman, R. (1999). Magic in theory: an introduction to the theoretical and psychological elements of conjuring (Hatfield:
Lamont, P., Henderson, J. M., & Smith, T. (in press). Where science and magic meet: the illusion of a ‘science of magic’. Review of General Psychology. (* e-mail Peter for a pre-print)
Change Blindness
Another everyday phenomenon used by magicians to create illusions is Change Blindness. Change Blindness refers to when a detail of the visual world changes without us noticing. For example, the most famous change blindness demonstration was performed by Simons and Levin (1997). In this demonstration they made strangers in the street fail to notice when the person they were talking to changed into a different person. They achieved this by hiding the change behind a door which was rudely carried between the stranger and the experimenter during the conversation. See a demonstration of the effect here. And the original article here.
Change Blindness occurs for three reasons: 1) either we don’t perceive the object before it changes, 2) our attention isn’t attracted to the change, or 3) we don’t compare the changed object to our memory of the original object. The first reason is similar to inattention blindness in that it is a failure to take in enough detail of the object. This is probably due to not looking at the object and only taking in sketchy information about the object from our peripheral vision (away from the fovea). The second reason is essential for us to experience change blindness. In the Simons and Levin example the change was hidden behind the door. If the door hadn’t been present and somehow one person had spontaneously changed into another person the change itself would have captured our attention. This is because the change creates visual transients: sudden unnatural changes in the light landing on our retina. In nature visual transients are often caused by dangerous events such as rapidly approaching predators or unexpected object suddenly lunging towards us. As a consequence our visual system is tuned to transients and responds by directing our eyes towards them. Our faith in the our ability to automatically response to such changes is so great that if these transient are hidden we often fail to check whether a change has happened and fail to notice them.
In the Bang! piece we used a change blindness demonstration to show how we rely on the visual world to tell us what has changed. The method we used to hide the change was more subtle than the door example: we used the viewer’s own eye movements. Every 200-300ms we rapidly shift our eyes in order to look at a new object. These eye movements are called saccades. We generally do not blink during a saccade so light continues to land on our retinas. Saccades are so rapid that the light projected into our eyes blurs across our retina. Clearly we do not perceive this blur as otherwise every time you moved your eyes – such as right now, as you are reading this text – we would experience flashes of blurring. To ensure we don’t see the blur our visual system stops processing the light during a saccade. We are effectively blind for the 20-50ms it takes to shift the eyes to a new stable position! If a change is timed to coincide with a saccade the visual transients associated with the change are hidden and our attention is not drawn to it. The change is hidden and the viewer is completely unaware that anything has happened.
In our lab we use an eye tracker to monitor people’s eye movements and detect when a saccade occurs. An eye tracker uses a high-speed infra red camera to locate the viewer’s pupil and record its movements. From the movement of the pupil we can work out where the viewer is looking on a computer screen. In the Bang! piece we showed
Now its your turn!
Without an eye tracker we can create similar change blindness effects by hiding the visual transients behind a flicker. I have recreated the change blindness test performed by
Did you get the right answer? Now watch what happens when we make the changes without the flickers:
The changes seem to ‘pop out’ because the visual transients capture our attention.
The list of changes and their times in the video are written below in invisi-text. Uncover the answer by highlighting the white text.
*Hold down the left mouse button here and drag it to the bottom Ã
9 sec = Plane in centre appears
10 sec = VUE sign disappears
12 sec = Top floors of the tower block on the right disappear.
14 sec = Safety barriers change colour
16 sec = Man and child change to a woman
18 sec = Rear wheel of left-most bike disappears
20 sec = lowest branch of the tree disappears
21 sec = Man appears next to dustbin
23 sec = Bus disappears
25 sec = Left tower block disappears
*ß finish highlighting text here.
The first time you viewed the scene you may have found it easier to detect some changes rather than others.
These phenomena, inattentional blindness and change blindness are key tools used by magicians to control our visual experience and create fantastical effects. However, they are not exclusive to magic as they are a natural product of how our visual system works. We fail to detect changes or see details of our visual world during every day life. It is only when this failure is brought to our attention during demonstrations like the one above or during magic tricks that we are experience surprise. By looking at these phenomena and how magicians utilise them we can learn more about how these operate in every day life and how much our experience of the visual world is an illusion.
For further information on using eye tracking to investigate change blindness look at the papers below and the rest of the research coming out of our lab:
http://www.psy.ed.ac.uk/people/jhender9/Lab/
Henderson, J. M., & Hollingworth, A. (1999). The role of fixation position in detecting scene changes across saccades. Psychological Science, 5, 438-443
Simons, D. J. (2000). Attentional capture and inattentional blindness. Trends in Cognitive Sciences, 4, 147-155.
Wednesday, September 23, 2009
Bang! Goes the Theory

Friday, September 04, 2009
Film as a source of visual knowledge
Tuesday, August 11, 2009
The educational power of film
Saturday, August 01, 2009
Antichrist and the anti-cut

Lars von Trier’s Antichrist is an unsettling film for many reasons. It will be discussed in depth for its more obvious unsettling traits such as its intense graphic violence and self-mutilation and lack of a clear message especially with regard to gender relationships and the nature of evil. Some of these traits, such as the horror imagery, settings and plot-devices may seem unique within
Antichrist is a two-header centring around the grief of a married couple (Charlotte Gainsborough and Willem Dafoe) after the loss of their young son during the film’s prologue. The majority of the film depicts the two main actors whilst they try to come to terms with the loss and confront the wife’s fears about their holiday cottage in the woods,

At the recent Society for Cognitive Studies of the Moving Images annual meeting in
The effect of an Anti Cut on the viewer is cognitive dissonance. Cognitive dissonance comes about when a person holds two (or more) conflicting concepts in their mind at the same time. The experience of cognitive dissonance is unpleasant. We endeavour to find order in our experiences and ideas and when conflicting concepts cannot be resolved we are uncertain how to act. If these concepts come from two different sensory modalities the brain tries to reconcile the two sources and come up with an amalgamation. A classic example of this is the Mc Gurk Effect (see video below). The McGurk effect is a demonstration of how we did not evolve to process our senses in isolation. When watching someone say a word our perception of the sounds they make is informed by both the audio and way their lips mouth the word. If these two sources are in conflict e.g. the mouth says “ba” but the audio track says “ga”, we perceive something in between, e.g. “da” . This demonstrates how sensory perception is multimodal and the brain will endeavour to resolve cognitive dissonance even if it means distorting reality and creating an illusory perception.
In the case of
As always, Lars Von Trier is pushing the boundaries or editing in order to experiment with our perception of film. As a film viewer I adore
Monday, June 29, 2009
Come and work in our lab: PhD studentships
SCHOOL OF PHILOSOPHY, PSYCHOLOGY AND LANGUAGE SCIENCES
PPLS (PSYCHOLOGY) CAREER DEVELOPMENT STUDENTSHIPS
Deadline for Application: Friday 10th July 2009
A minimum of four Career Development Studentships are offered by Psychology within the School of Philosophy, Psychology and Language Sciences
Career Development Studentships are designed to provide students with teaching
experience, training, and other career development opportunities. A stipend of £10,000 per
annum will be provided in addition to tuition fees at the Home/EU level and additional
programme costs of £600 per annum. The studentships will start in September 2009.
Further information on the topics/research areas are available online at:
http://www.ppls.ed.ac.uk/postgraduate/CareerDevStudentship.html
Eligibility
Candidates should have an academic background in Psychology holding (or expecting to hold
by September 09) a postgraduate Masters level qualification or equivalent and be eligible to
apply for PhD level study at the University of Edinburgh. Students entering the second year
of their PhD Psychology study at the University of Edinburgh are also encouraged to apply.
Both International and Home/EU students are eligible to apply although please note that the
tuition fees provided in the studentship are at a Home/EU level only.
Application Procedure
Candidates are invited to apply through the University of Edinburgh online application system
(EUCLID); please ensure that you note your intention to apply for this studentship under the
funding section of the application form. When you submit your application, please also email
pplspg@ed.ac.uk to indicate that you have done so.
The application form and further guidance is available online at:
http://www.ppls.ed.ac.uk/postgraduate/CareerDevStudentship.html
If you have already submitted an application for PhD Psychology and would like to be
considered for these studentships, please email pplspg@ed.ac.uk to register your interest.
Deadline for application: Friday 10th July 2009
Selection Process
Short listed candidates will be invited to attend an interview at the University of Edinburgh. Successful candidates will be informed by Friday 14th August 2009
Monday, July 14, 2008
ECHOES
The intention of the ECHOES project is to develop a safe, motivating, and inclusive multimodal learning environment allowing Aspergers and Typically Developing children to explore different social situations to improve their social interaction and communication skills. ECHOES II will provide a unique opportunity to explore a place in which learning happens and in which learning can be studied.
The ECHOES project is a multi-site (Edinburgh, London, Sussex, Birmingham, Dundee, Glasgow, and Cardiff), three year project funded jointly by ESRC and EPSRC via the TLRP TEL call. This project which will combine the latest and most innovative methods in participatory design of education technology with cutting-edge multimodal interfaces including motion, gesture, and facial expression capture, audio reactivity and gaze tracking within an augmented reality 3D environment. Further details on the project can be found here:
http://www.lkl.ac.uk/cms/index.php?option=com_content&task=view&id=287&Itemid=91
The ECHOES project is currently at the recruitment stage. We are looking for a range of full-time, part-time RAs and PhD students. These posts are spread across the various sites. Details are below. If you are interested in any of these posts please follow the links below and contact the people named in each advert.
*Check each advert for closing date as it varies across posts*
Full-Time Research Fellow (School of Informatics, University of Edinburgh)
The successful applicant will contribute to the design and development of an intelligent multimodal interface, using a combination of an interactive whiteboard, 3D graphics, speech synthesis, and video input technology. The post will involve development of the ECHOES software architecture and organisation of software modules developed at the other sites. Experience in software engineering and multi-modal interfaces is highly desirable.
http://www.jobs.ed.ac.uk/vacancies/index.cfm?fuseaction=vacancies.detail&vacancy_ref=3009321
Part-Time Research Assistant (School of Informatics, University of Edinburgh)
Job description same as above except RA will focus more on combining existing interface technologies, e.g. motion tracking + gaze tracking, into the ECHOES architecture.
http://www.jobs.ed.ac.uk/vacancies/index.cfm?fuseaction=vacancies.detail&vacancy_ref=3009321
Full-Time Research Fellow (London Knowledge Lab, University of London)
The successful applicant will collaborate in the development of the ECHOES II environment with other researchers, focusing particularly on the design and implementation of the learning activities and interventions along with the ‘action engine’ responsible for the selection of the activities based on user input .
http://jobs.ioe.ac.uk/Vacancy.aspx?ref=7AC-CPLKL-4665
Part-Time Research Assistant (London Knowledge Lab, University of London)
The successful applicant will collaborate in the design of the ECHOES II environment with other researchers, focusing particularly on the design and testing of the learning activities and the evaluation of the educational impact of the environment.
http://jobs.ioe.ac.uk/Vacancy.aspx?ref=7AC-CPLKL-4664
Full-Time Research Fellow (School of Informatics, University of Sussex)
The successful candidate will use participatory design methods with children in order to design and implement the interface for the ECHOES II environment, and collaborate in the develompent of the environment with the other researchers, focusing particularly on the development of 3D characters and avatars and “mirroring” the user’s actions through video input.
Enquiries should be address to Dr. Judith Good (J.Good@sussex.ac.uk).
Full-Time PhD. (School of Computing, University of Dundee)
The School of Computing invites applications for a PhD student to work on the functional communication of children with autistic spectrum disorder (ASD) and similar disabilities within a wider project to develop and evaluate a technology enhanced multimodal learning environment designed to scaffold children’s social interaction and communication skills.
The successful candidate will collaborate with other researchers who will be designing a system for the exploration and learning of social interaction skills, and will be focussing of how the ECHOES environment impacts on the interactive communication of children with ASD, specifically Asperger Syndrome.
A first class or good 2:1 Honours or Masters degree, or equivalent, in Applied Computing, Computer Science, Psychology, Cognitive Science or related discipline is essential, as are knowledge of user-centred design methods, computer vision, and an ability to organise and run studies involving children, parents and professionals. Good written and communication skills are essential.
Enquiries and application requests should be addressed to Dr Annalu Waller (awaller@computing.dundee.ac.uk ).
Closing date for applications: 15 September 2008
Completing the Circle
For further information see:
http://www.cea.mdx.ac.uk/?location_id=59&item=31
Saturday, July 05, 2008
Research Assistant in Active Viewing of Dynamic Scenes
The project will begin later this year and we are currently advertising for a part-time Research Assistant to join the project. Details copied below. If you are interested please contact me or John asap as the deadline is July 11th.
"Research Assistant, Edinburgh University
Active Viewing of Dynamic Scenes: Eye Movements in Video
The University of Edinburgh invites applications for a two-year, part-time (20 hours per week), fixed term Research Assistant related to a new project funded by the Leverhulme Trust titled: Active Viewing of Dynamic Scenes: Eye Movements in Video. The post requires technical expertise with computational methods in computer graphics with particular application to video. Knowledge of human visual perception and eyetracking methods is desirable. The research assistant will interact with cognitive psychologists and cognitive scientists in the research team, and should have excellent interpersonal and communication skills. Applications are welcomed from individuals with a good first degree in computer science, informatics, or related computational discipline.
Informal enquiries: Prof John M. Henderson (john.m.henderson@ed.ac.uk).
Apply online (www.jobs.ed.ac.uk, Vacancy Reference: 3009312) including a CV and statement of relevant experience. Alternatively, telephone the recruitment line on 0131 650 2511. "
Wednesday, July 02, 2008
MSC in Visual Cognition
Funding may be available for this MSc.
For further information follow this link:
http://www.psy.ed.ac.uk/postgrad/msc/vc
If you have any specific questions about the course or want to discuss potential research ideas contact me directly (tim [dot] smith [at] ed.ac.uk).
Tuesday, March 18, 2008
Attention: experimental film project

How do we watch film? How does the way that I watch a film differ from the way you watch a film? If we were to make a film of the way I watch a film, what would it look like?
These are some of the questions a group of Design and Digital Media MSc. students under my mentoring are exploring in an art installation entitled Attention: experimental film project. Parag Mital, Stefanie Tan Su Ann, and Dave Stewart have create an interactive film experience for their Digital Media Studio Project that will be premiered this Friday (21st March), 12-5pm in Teviot Row House, Edinburgh University.
The installation is inspired by my research into how we attend to film, how this shapes our experience of a film, and how film manipulates this attention (see my thesis). Film can be interpreted as an analogue of our experience of the visual world. Snapshots of fragmented but related visual information is presented to us in a way that we can comprehend by forming conceptual linkages between them. This is similar to the way we acquire information from the world by moving our eyes. If we take this analogy to its logical conclusion, a visual recreation of the information acquired from a scene as a person shifts their eyes may resemble an edited filmic representation of that scene.
Creating such a filmic recreation of a viewers experience is the intention of this project.
How is this accomplished and what is the result? Check out the project website or come along to the premier to find out