Lake Ontario Visionary Establishment presents 44 th Feb 5th and 6th, 2015 44 Four Points by Sheraton Niagara Falls Fallsview Hotel 44 SCHEDULE THURSDAY, FEBRUARY 5, 2015 11:00 am - 12:00 pmRegistration Jessica Grahn: Rhythm perception and the motor system 12.30 pm - 1:40 pm 1:40 pm - 2:30 pm Coffee break and posters Daniel Goldreich: The tau of tactile spatial perception 2:30 pm - 3:40 pm 3:40 pm - 4:20 pm Coffee break Karl Szpunar: Taming the wandering mind: Improving attention and learning during lectures 4:20 pm - 5:30 pm 5:30 pm - 8:00 pmDinner 8:00 pm - 1:00 am L.O.V.E. Affair: (Drummond Room) FRIDAY, FEBRUARY 6, 2015 9:00 am - 9:30 pmRegistration Susanne Ferber: Attention: Work(ing memory) in progress 9:30 am - 10:40 am 10:40 am - 11:15 am Coffee break and Posters Jordan Poppenk: Functional-anatomical organization of the human hippocampal long axis 11:20 am - 12:30 pm 12.30 pm - 1:50 pmLunch Allison Sekuler: The Many Faces of Face Perception 1:50 pm - 3:00 pm 1 44 SPEAKERS JESSICA GRAHN Rhythm perception and the motor system Abstract: Moving to musical rhythm is an instinctive, often involuntary activity. Even very young children move to the beat without any special musical training, but how does the brain produce this behaviour? In this talk I will describe how perception of musical rhythms activates motor areas, both cortical and subcortical, even when no overt movement is made. I will discuss neuropsychological studies that suggest a special role for the basal ganglia circuitry in a key component of rhythm perception: feeling the ‘beat’. I then cover transcranial direct current stimulation studies that compare how the basal ganglia circuitry role in rhythm perception differs from that of other motor network components, such as premotor cortex or the cerebellum. Finally, I will consider behavioural and fMRI studies of individual differences in rhythmic ability, examining how motor and auditory activity relate to important behavioural components of rhythm ability, including sensitivity to the beat, auditory short-term memory, and musical training. 2 DANIEL GOLDREICH The tau of tactile spatial perception Abstract: The brain faces a significant chal- lenge as it attempts to translate fleeting and often imprecise sensory information into accurate perception. A growing body of research suggests that the brain takes advantage of prior knowledge of stimulus statistics in order to enhance perceptual resolution beyond the limits imposed by sensorineural imprecision. Reliance on prior knowledge comes at a cost, however, as the rare physical event that violates expectation is misperceived. A percept that misrepresents physical reality – an illusion – is thus both a consequence of, and a clue to the brain’s expectations regarding the world. In touch as in audition and vision, when brief stimuli occur in rapid succession at two or more locations, perception strikingly shrinks the intervening distance between consecutive events. This “perceptual length contraction” phenomenon manifests in several illusions, among them the startling cutaneous rabbit illusion, in which series of taps delivered to as few as two skin positions appear to hop progressively from one position to the next, landing in the process on intervening skin that was never actually touched. I will provide an accessible step-by-step exposition of a Bayesian perceptual observer model that replicates the rabbit and related illusions. The Bayesian observer optimally joins uncertain estimates of spatial location with the expectation that stimuli tend to move slowly. I speculate that this expectation – a Bayesian prior – represents the statistics of naturally occurring stimuli, learned by humans through sensory experience. Timepermitting, I will present recent experimental data that are consistent with the model’s predictions. 3 44 SPEAKERS KARL SZPUNAR Taming the wandering mind: Improving attention and learning during lectures Abstract: Students often find it difficult to sustain attention during classroom lectures. As a result, considerable amounts of class time can be spent engaged in bouts of mind wandering, a mental experience known to get in the way of effective learning. Hence, the development of interventions that can be used to help students maintain focus in the classroom should be of considerable interest. In this talk, I will present data from a series of recent laboratory experiments demonstrating the various ways in which the act of interpolating lectures with brief memory tests can serve to improve attention and learning. I will also present results from a recent brain imaging study that provides new insights into the manner in which brain networks involved in attention, cognitive control, and introspective thought interact with one another in the context of learning from lectures. I will conclude by outlining the development of new research that will bring brain imaging techniques into the classroom in order to bridge the gap between laboratory research and learning in the classroom. 4 SUSANNE FERBER Attention: Work(ing memory) in progress Abstract: How does a pitcher keep track of the number of outs, recent pitches, and the number of runners around the bases? Selecting and sustaining a percept after it has been removed from view involves attentional and visual working memory (VWM) processes that enable us to decide which input will continue forward for further processing and to hold in our mind’s eye the contents of our visual awareness. Our success on countless basic and higher-order tasks depends on our ability to mentally represent external events, such that they can be integrated with long-term knowledge to shape our decisions and actions. Normally these systems work well, but they may fail after brain damage or they may be disrupted in healthy individuals when the system is overloaded. Most theories on VWM posit a capacity limit of less than four items. The neuroanatomical substrate and electrophysiological signature of this processing bottleneck have been pinpointed to the temporal, parietal and occipital cortices, as activity in these areas correlates with the amount of information kept in VWM. Some of these areas also subserve other keystone cognitive faculties, such as attention and object recognition. Despite our understanding of the neural and cognitive processing limitations of VWM, we know little about how VWM ultimately affects visually-guided behavior and how it intersects with other aspects of cognition. I will present evidence from behavioural, neuroimaging and neuropsychological studies to clarify the cognitive and neural mechanisms that govern the interactions of VWM with other cognitive faculties in the healthy young, aging and diseased brain. 5 44 SPEAKERS JORDAN POPPENK Functional-anatomical organization of the human hippocampal long axis Abstract: Considerable investigation and theoretical development has sought to distinguish the mnemonic role played by the hippocampus from that played by other neuroanatomical structures in the medial temporal lobes. Now, mounting evidence suggests that medial temporal lobe contributions to human memory may be further distinguished based on distinctions within the hippocampus itself. In particular, recent evidence suggests that anterior and posterior extents of the structure subserve memory in different ways. In this talk, I will address the questions: a) in what ways is the hippocampus functionally heterogeneous along its long (anterior to posterior) axis, and b) how is such heterogeneity possible when the internal circuitry of the hippocampus follows the same basic pattern from its anterior to posterior extent? To address these questions, I will discuss volumetric, connectivity, lesion, and functional evidence that appear to indicate unique anterior and posterior hippocampal contributions to cognition. I also will attempt to synthesize this evidence into a unified theoretical position. In particular, I will advance the view that the anatomical properties of the hippocampus yield a ³grain² of representational detail along the structure¹s long axis, with memory representations incorporating increasingly high levels of specificity as one moves posteriorly along this axis. Combined with distinctive connections of anterior and posterior hippocampus to other brain regions, distinctive computational environments are postulated along the structure’s long axis that facilitate qualitatively different cognitive operations. 6 ALLISON SEKULER The Many Faces of Face Perception Abstract: For decades, researchers have tried to determine what critical factors drive face recognition, and how we can explain both the seeming ease with which we recognize friends and foes, and the tremendous difficulty we encounter when trying to recognize faces in unusual situations, such as picture-plane inversion. This presentation will explore the limitations of traditional theories of face recognition, including configural or holistic processing, spatial coding, and the differential utilization of spatial frequency information. It also will describe a new approach toward understanding face perception, making use of orientation information inherent in faces. I’ll describe a range of studies from our lab and others that shed new light on how we recognize hundreds of faces each day; what might lead to individual differences in face processing ability; why inverted faces are difficult to recognize; and the ways in which context, learning, and aging affect the neural systems underlying face processing. 7 44 POSTER SESSIONS SCHEDULE Poster Session 1: Thursday Posters up 12:00pm Poster Presentations from 1:40pm - 2:20pm Posters down by 6:00pm Poster Number Consciousness T1-3 Attention T4-10 Memory T11-23 Development T24-27 Educational Cognition T28-29 Language T30-32 Judgements and Decision Making T33-34 Motivation and Emotion T35-36 Poster Session 2: Friday Posters up 9:00am Poster Presentations from 10:40am - 11:15am Posters down by 3:30pm. 8 Sensation and Perception F1-21 Learning F22-25 Brain and Behaviour F26-34 Genetic and Evolutionary Roots of Behaviour F35 THURSDAY POSTERS Consciousness T1. Towards the use of brain stimulation to improve motor function in covertly aware patients; A healthy volunteer pilot study. Kathleen Lyons, Adrian Owen, Davinia Fernandez-Espejo Brain and Mind Institute, University of Western Ontario T2. Probing conscious experience of rich naturalistic stimuli. Leah Sinai, Rhodri Cusack, Adrian Owen, Lorina Naci Brain and Mind Institute, University of Western Ontario T3. Covert command following versus communication; implications for disorders of consciousness. Natalie Osborne; Adrian Owen; Davinia Fernández-Espejo (Department of Psychology, Western University Attention T4. Neuropsychological differences in attentional biases between ADHD adults and their peers. Jiaqing Chen1, Matthias Niemeier1,2 (1) DDepartment of Psychology, University of Toronto; (2) Centre for Vision Research, York University T5. Does inhibitory devaluation reflect the affective consequences of automatic or controlled inhibition? Rachel Driscoll, David De Vito, Mark Fenske University of Guelph T6. Beyond the emotional impact of dissonance: dissonant music increases cognitive load. Tanor Bonin, Daniel Smilek University of Waterloo T7. Rest is best, but short-lived: Comparing rest breaks and task switches during a vigilance task. Brandon C. W. Ralph, Kris Onderwater, David R. Thomson, Daniel Smilek University of Waterloo T8. The effects of ambient noise on cognitive functioning. Emily G. Nielsen; John Paul Minda The University of Western Ontario T9. Is a picture worth a thousand objects? How set size and scene context affect visual search efficiency. Laura Tian1, Effie J. Pereira2, Monica S. Castelhano1 (1) Queen’s University; (2) McGill University 9 44 THURSDAY POSTERS T10. The dynamic role of attention during visual statistical learning. Maria Giammarco, Brendon Samuels, Mark Fenske, & Naseem Al-Aidroos University of Guelph Memory T11. Inhibition at the interface of attention and working mem- ory results in stimulus devaluation. David De Vito; Mark J. Fenske University of Guelph T12. Visual working memory performance is determined by the allocation of attentional resources: Evidence from probabilistic cueing. Holly A. Lockhart1; Naseem Al-Aidroos2; Stephen M. Emrich1 (1) Brock Uni- versity; (2) University of Guelph T13. Hungry, hungry singletons: Do unique objects eat up visual working memory resources? Jason Rajsic; Sol Sun; Lauren Huxtable; Jay Pratt; Susanne Ferber University of Toronto T14. Memory for temporal information during spatial navigation. Iva Brunec1,2; Jason Ozubko1,2; Morris Moscovitch1,2; Morgan Barense1,2 (1) University of Toronto; (2) Rotman Research Institute, Baycrest Centre for Geriatric Health T15. Temporal integration of information during speech perception and production. LKathrin Muesch1; Taufik A. Valiante2,3; Christopher J. Honey1 (1) University of Toronto; (2) Division of Fundamental Neurobiology, Toronto Western Research Institute; (3) Division of Neurosurgery, Department of Surgery, University of Toronto T16. Autonomic contributions to adaptive memory. Jordan DeKraker1; Chris M. Fiacconi1; Stefan Köhler1,2 (1) Brain and Mind Institute, University of Western Ontario; (2) Rotman Research Institute, Baycrest Centre, Toronto, ON T17. Investigating the effects of perceptual and cognitive interference on recognition memory in amnesia. Bryan Hong1; Rachel N. Newsome ; Victoria M. Smith ; Alexander Jacob ; Alexandra N. Trelle3; Maria D’Angelo2; Jennifer D. Ryan2; R. Shayna Rosenbaum4; Morgan D. Barense1,2 1 1,2 1 (1) Department of Psychology, University of Toronto; (2) Rotman Research Institute; (3) University of Cambridge; (4) York University 10 THRUSDAY POSTERS T18. Integration of complex visual and auditory features is domain specific. Celia Fidalgo, Andy Lee, Morgan Barense University of Toronto T19. Visual interference-based memory errors driven by in- creased false recognition. Lok-Kin Yeung1; Hannah EP Bild-Enkin1; Anna Keshabyan1; Morgan D Barense1,2 (1)University of Toronto; (2) Rotman Research Institute, Toronto T20. The effects of real-world landmark familiarity on involuntary episodic memory. Jessica Robin1,2; Luisa Garzon1; Morris Moscovitch1,2 (1) University of Toronto; (2) Rotman Research Institute, Baycrest Centre T21. Looking at nothing: How eye movements relate to episod- ic richness during event reconstruction. Michael Armson1,2; Douglas A. McQuiggan2; Brian Levine1,2; and Jennifer D. Ryan1,2 (1) University of Toronto; (2) Rotman Research Institute, Baycrest Centre T22. Naturalistic and laboratory encoding contexts dissociate subjective and objective measures of episodic memory in older adults. Nick Diamond1,2; Aggie Bacopulos2; Nicola De Souza2; Nivethika Jeyakumar2; Brian Levine1,2 (1) University of Toronto; (2) Rotman Research Institute, Baycrest Centre T23. Temporal expectancy enhances recognition memory. Sathesan Thavabalasingam1; Edward B O’Neil1; Zheng Zeng1; Andy C H Lee1,2 (1) University of Toronto; (2) Rotman Research Institute, Baycrest Centre Development T24. Motor function and brain connectivity in the first year. Jordynne L.V. Ropat1; Annika C. Linke1; Conor J. Wild1; Charlotte Herzmann1; Leire Zubiaurre-Elorza1; Hester Duffy1; David S.C. Lee2; Victor K. Han2; Rhodri Cusack1,2 (1) Brain and Mind Institute, Western University; (2) Children’s Health Research Institute T25. The Development of symbolic and nonsymbolic magni- tude processing skills in the first year of formal schooling? Anna Matejko; Daniel Ansari University of Western Ontario 11 44 THURSDAY POSTERS T26. Measuring the development of auditory-language function in the first year with neuroimaging. Conor J. Wild1; Annika C. Linke1; Leire Zubiaurre-Elorza1; Charlotte Herzmann1; Hester Duffy1; Victor K. Han2; David S.C. Lee2; Rhodri Cusack1,2 Department of Psychology, University of Guelph T27. Impaired neural processing efficiency of perceptual binding in Autism Spectrum Disorders. Ryan Stevenson1; Stephanie Brown-Lavoie2; Magali Segers2; James Bebko2; Mark Wallace3; W. Dale Stevens2, Susanne Ferber1; Morgan Barense1 (1) University of Toronto; (2) York University; (3) Vanderbilt University Educational Cognition T28. Measuring symbolic numerical processing in adults. Celia Goffin, Daniel Ansari University of Western Ontario T29. The role of working memory capacity in interleaved instruction. Jordan Ho, Holly Pyndiura, Faria Sana, Joe Kim McMaster University Language T30. Decoding the spatiotemporal components in language: Implications for patient prognostication. Steve Beukema; Ken McRae; Adrian Owen; Damian Cruse The Brain and Mind Institute, University of Western Ontario T31. The association between music training and reading comprehension skill. Kirthika Venkatesan, Swathi Swaminathan, E. Glenn Schellenberg University of Toronto at Mississauga T32. The interpretation of ambiguous words in psychosis. Daniella Ladowski1,2; Christopher Bowie2; Ingrid Johnsrude1,2 (1) University of Western Ontario; (2) Queen’s University Judgement and Decision T33. Ego depletion differentially affects rule-defined and non- rule-defined category learning. Rachel Rabi, John Paul Minda The University of Western Ontario 12 THURSDAY POSTERS T34. Improving creative analogical reasoning via explicit cues: The importance of individual differences in cognitive style. Nathaniel Barr, Gordon Pennycook, Jennifer A. Stolz, & Jonathan A. Fugelsang University of Waterloo Motivation and Emotion T35. The influence of aerobic and resistance exercise on anxiety. Holly Howe1; Catherine Sabiston1; Jennifer O’Loughlin2 (1) University of Toronto; (2) University of Montreal T36. A comparison between anatomically-based and functional connectivity-based parcellations of the human amygdaloid complex. Vincent Man1; Paul Stillman2; William A. Cunningham1 (1) University of Toronto; (2) Ohio State University NOTES 13 44 FRIDAY POSTERS Sensation and Perception F1. Age, inhibition and figure-ground assignment. John A. E. Anderson1; Karl M. Healey2; Lynn Hasher1; Mary A. Peterson3; (1) University of Toronto & Rotman Research Institute; (2) University of Pennsylvania; (3) University of Arizona F2. Bimanual grasping coordination in a partially acallosal patient. Ada Le, Matthias Niemeier University of Toronto Scarborough F3. Perisaccadic electrophysiology. Adam Frost1; Matthias Niemeier2; (1) Department of Psychology, University of Toronto; (2); Center for Vision Research, York University F4. Preliminary assessment of perceived simultaneity and causality in young and old adults. Gillian Bedard, Michael Barnett- Cowan University of Toronto F5. Measuring the flexibility of orientation selectivity in face processing by varying task demands. Matthew V. Pachai, Patrick J. Bennett, Allison B. Sekuler McMaster University F6. Exploring the functional consequences of age-related changes in multisensory integration using a driving model. Robert Ramkhalawansingh1,2; Behrang Keshavarz2; Bruce Haycock2; Jennifer Campos1,2 (1) University of Toronto; (2) Toronto Rehabilitation Institute F7. Investigating the effect of arousal on cognition. Tram Nguyen Jessica A. Grahn Adrian M. Owen The Brain and Mind Institute, Department of Psychology, The University of Western Ontario F8. Temporal trimming: Object-substitution masking alters the perceived duration of object representations. Geoffrey Harrison Chelsia Lau, Daryl Wilson Department of Psychology, Queen’s University F9. Temporal distortion in the perception of actions and events. Hemangi Dave1; Yoshiko Yabe2*; Melvyn A. Goodale2 (1) Department of Physiology and Pharmacology, The University of Western Ontario; (2) Brain and Mind Institute and Department of Psychology, The University of Western Ontario F10. Eyetracking of coarticulatory cue responses in children and adults Alexandra M. Cross, Marc F. Joanisse Brain and Mind 14 Institute and Department of Psychology, University of Western Ontario FRIDAY POSTERS F11. Testing a Bayesian model of the tactile rabbit and tau illusions. Jonathan Tong, Vy Ngo, Daniel Goldreich Department of Psychology Neuroscience and Behaviour, McMaster University F12. Speed differences and response biases between genders in three-dimensional mental rotation. N. E. Ouslis; B. J. Pereira; I. Spence University of Toronto F13. Motor effector’s tapping rate influences movement’s effect on timing perception. Monique Tardif, Fiona Manning, Michael Schutz McMaster University F14. Effects of spatial interference in a visual discrimination task in preclinical MCI. Victoria Smith, Rachel Newsome, Lev Tankelevitch, Will Kendall, Morgan Barense (1) University of Toronto; (2) University of Toronto; (3) Oxford University; (4) University of British Columbia; (5) University of Toronto F15. Differentiating music perception and imagination using EEG. Avital Sternin, Sebastian Stober, Jessica A. Grahn, Adrian Owen The University of Western Ontario F16. Cueing emotion: Comparing perceived emotion to piano literature interpretations. Aimee Battcock, Dr. Michael Schutz McMaster University F17. Direction of emotion- colour associations. Bryanna Lucyk; Christie Purchase, Diane Humphrey Department of Psychology, King’s University College at Western University F18. The influence of body orientation relative to gravity on egocentric distance estimates in immersive virtual environments. Jacqueline Rauhut ; Brandon Lieng ; Markus Leyrer ; 1,2 2,3 4 Michael Barnett-Cowan (1) Department of Kinesiology, University of Waterloo; (2) Games Institute, University of Waterloo; (3) St David Catholic Secondary School, Waterloo: (4) Max Planck Institute for Biological Cybernetics, Tübingen, German 1,2 F19. Disentangling perceptual and semantic ambiguity: development of a new task. Louisa Man, Danielle Douglas, Rachel N. Newsome, Hira Aslam, Haley Park, Morgan D. Barense University of Toronto 15 44 FRIDAY POSTERS F20. Poor pitch singers may perform worse in the presence of an accurate singer: Effects of augmented feedback on the accuracy of pitch matchings. Malak Sharif; Peter Pfordresher University at Buffalo, the State University of New York F21. Exploring timing coordination between percussionists in Steve Reich’s iconic “Drumming”. Michael Schutz ; Rus1 sell Hartenberger (1) McMaster Institute for Music and the Mind; (2) University of Toronto 2 Learning F22. Effects of levodopa on cognition in healthy young adults. Andrew Vo ; Ken N. Seergobin ; Shangjun (Collier) Jiang ; Penny A. 1,2 1 3 MacDonald1,2,3,4 (1) Brain and Mind Institute, University of Western Ontario; (2) Department of Psychology, University of Western Ontario; (3) Department of Physiology and Pharmacology, University of Western Ontario; (4) Department of Clinical Neurological Sciences, University of Western Ontario F23. Modeling sequence learning in a local cortical circuit. Kevin Himberger, Christopher Honey University of Toronto F24. Disfluency enhanced FMcMaster University recall. Nabil Khaja, Amy Pachai, Joseph Kim F25. Temporal dynamics of learning birdsong identification: Does training sequence matter? Courtney Rice, Barbara Church, Leslie Klyachman, Eduardo Mercado University at Buffalo, SUNY Brain and Behaviour F26. Investigating cortical and subcortical influences on face perceptions. Laura Cabral, Bobby Sotjanoski, Rhodri Cusack The University of Western Ontario F27. Asymmetrical medial geniculate body volume in people with one eye. Stefania S. Moro ; Krista R. Kelly ; Larissa McKet1,2,3 16 5 (1) Department of Psychology, York University; (2) Centre ton ; Jennifer K.E. Steeves for Vision Research, York University; (3) The Hospital for Sick Children, Toronto, Canada; (4) Department of Biology, York University; (5) Crystal Charity Ball Pediatric Vision Evaluation Center, Retina Foundation of the Southwest, Dallas, Texas, USA 2,4 1,2,3 FRIDAY POSTERS F28. Are numbers specialized or grounded in a generalized system for magnitude representation? H. Moriah Sokolowski, Wim Fias, Daniel Ansari University of Western Ontario; Ghent University F29. Content-specific age-related effects on recollection and familiarity. Patricia Marshall, Morgan Barense, Nicole Anderson University of Toronto F30. Electrocorticographic oscillatory connectivity predicts low frequency resting state functional magnetic resonance imaging connectivity. David M. Groppe ; Pierre 1 Mégevand ; Stephan Bickel ; Manuel Mercier ; Corey J. Keller ; Matthew S. Goldfinger1; Ashesh D. Mehta1; (1) Department of Neurosurgery, Hofstra North Shore 1 2 2 3 LIJ School of Medicine and Feinstein Institute for Medical Research; (2) Department of Neurology, Albert Einstein College of Medicine; (3) Albert Einstein College of Medicine F31. Neural synchronization at multiple timescales. Gabe Nespoli, Paolo Ammirante, Frank Russo Ryerson University F32. Embodied representations of joint actions: A study on collaborative grasping. Lin Guo, Matthias Niemeier University of Toronto at Scarborough F33. Oxytocin, aggression, and neural activity in the naked mole-rat. Georgia Hathaway; Melissa Holmes University of Toronto F34. TMS to object-selective LO and scene-selective TOS reveals effects to remote regions in the network. Sara A. Rafique, Lily M. Solomon-Harris, Jennifer K. E. Steeves Centre for Vision Research and Department of Psychology, York University F35. Tryptophan hydroxylase 1 gene polymorphisms and prefrontal activation during response inhibition. Dean Carcone1; Achala H. Rodrigo1; Stefan Jung; Hasan Ayaz2; Anthony C. Ruocco1 (1) University of Toronto; (2) Drexel University 17 44 SPECIAL THANKS th Feb 5th and 6th, 2015 EVENT COMMITTEE: Michelle Cadieux Monica Castelhano Joseph Kim David Shore McMaster University [email protected] McMaster University [email protected] Queen’s University [email protected] McMaster University [email protected] VOLUNTEERS: Sogol Afshar Taha Arshad Anna Finkelshtein Zeeshan Haqqee Jordan Ho Serena Ho Vicki Kam Nabil Khaja Zahra Khalesi Ana Kovacevic Irina Ghilic Mariana Lanzini Zachary Livshin Andrew LoGiudice Kristen Lucibello Olivia Merritt Liam Newlands Michelle Ogrodnik FINANCIAL CONTRIBUTOR: Canadian Society for Brain, Behavior and Cognitive Science Holly Pyndiura Marina Sadik Sebastian Sciarra Brendan Stanley Mahgol Taghivar Kaian Unwalla Kailey Veitch Craig Zhou
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