Thomas Strybel Ph.D.





Courses Typically Taught

Psychology 110  Introductory Statistics Calculation and meaning of statistical measures.  Descriptive and inferential statistics: probability, normal curve, correlation, sampling, hypothesis testing. (Lecture 3 hours, laboratory 2 hours.)  
Psychology 411/511 Statistical Design and Analysis of Experiments Simple and complex designs. Statistical inference in economical experimentation and in scientific inference and prediction.
Psychology 331 Sensation & Perception Basic phenomena of the senses, their physiological correlates and integration in complex perceptual judgments.
Psychology 418/518 Computer Applications in Psychology Foundations of computer technology and its application to psychology. Emphasis on real-time control by digital computers in psychological research and applications. (Lecture 2 hours, laboratory 2 hours.)
Psychology 427/527 Human Factors Systematic application of psychological principles to the design of person-machine systems. Emphasis in the laboratory on the development of skills required of a human factors psychologist. These skills will include systems and analysis, cognitive task analysis, rapid prototyping and usability testing. (Lecture 2 hours, laboratory 2 hours.) 


Recent Publications.

Multisensory Integration of Motion.
Strybel, T.Z. & Vatakis, A. (in press).  A comparison of auditory and visual apparent motion presented individually and with crossmodal moving distractors.   Perception.


Dynamic Auditory Localization.

Strybel, T.Z. &  Fujimoto, K. (2000).  Minimum audible angles in the horizontal and vertical planes: Effects of stimulus onset asynchrony and burst duration.  Journal Acoustical Society of America, 108, 3092-3095.
Span, S.* & Strybel, T.Z. (1999).  Auditory apparent motion: Effect of differences in burst duration and rise time on auditory apparent motion in the free field.  Journal Acoustical Society America, 106, 1605-1608.
Strybel, T.Z., and Menges, M. M.* (1998).  Auditory apparent motion between sine waves differing in frequency.  Perception, 30, 190-198.
Strybel, T. Z., Witty, A.W.* and Span, S.S.* (1998). The Effect of Timing and Separation on the velocity of auditory apparent motion. Perception and Psychophysics, 60, 1441-1451.
Perrott, D. R. and Strybel, T. Z. (1997).  Some observations regarding motion without direction. In R. Gilkey and T. Anderson (eds). Binaural and Spatial Hearing in Real and Virtual Environments, New Jersey: Lawrence Erlbaum.


Aurally Aided Visual Search.

Strybel, T.Z.  (2003).  The Relative Effectiveness of Audio and Visual Cues to the Local Target Area in Visual Search . Under review, Perception & Psychophysics.
Vu, K.L, Strybel, T.Z. & Proctor, R.. W. (2003).  Effects of Cue Displacement and Direction on Auditory Spatial Facilitation of Visual Search.  Under review, Spatial Vision.
Strybel, T.Z., & Guettler, D. (2001).  The effectiveness of visual vs. auditory cues in visual search performance: implications for the design of virtual environments.  In M.J.Smith, G. Salvendy, D. Harris & R.J. Koubek (eds): Usability Evaluation and Interface Design: Cognitive Engineering, Intelligent Agents and Virtual Reality. Vol 1. New Jersey: Erlbaum.1363-1367.
Rudmann, D.* & Strybel, T.Z. (1999). Auditory spatial facilitation of visual search performance: Effect of local vs global visual distractor density. Human Factors, 41, 146 - 160.
Fujawa, G.* and Strybel, T.Z. (1997).  Auditory spatial facilitation with valid and invalid cues.  Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 556-560.

Human Factors & Human Computer Interaction.

Strybel, T.Z. (in press).  Task analysis for the design of web applications.  In R. Proctor & K. P. Le Vu (Eds.) Handbook of Human Factors in Web Design.
Proctor, R.W., Vu, K.L., Salvendy, G. et al.  (2002).  Content Preparation and Management for Web Design: Eliciting, Structuring, Searching, and Displaying Information.  International Journal of Human-Computer Interaction, 14, 25- 92.
Vu*, K.L., Hanley, G.L., Strybel. T.Z. and Proctor, R. W. (2000).  Metacognitive processes in human-computer interaction: Self-assessments of knowledge as predictors of computer expertise.  International Journal of Human-Computer Interaction, 12, 43-71.

Attention Deficity Hyperactivity Disorder (ADHD).

Span, S. A., Earleywine, M., & Strybel, T.Z. (2002). Confirming the factor structure of Attention Deficit Hyperactivity Disorder symptoms in adult, non-clinical samples. Journal of Psychopathology and Behavioral Assessment. 24, 129-136.


Laboratory Facilities.

Visual Search Laboratory.

Visual search field is projected thru the window located above and behind the participant.Participant sits in front of a large projection screen.Loudspeakers behind the screen provide spatial audio cues.
The visual search laboratory is a large (approximately 3 m x 4.3 m) dimly-lit, semianechoic room.  All surfaces of the room are covered by Martek 10.16-cm acoustic foam, except for a small window separating the test room from the control room.  The participant sits 1.3m in the front and center of a large (100o horizontal by 82o vertical) acoustically-transparent screen (made of polyester) in the middle of the room. A  search field is projected through the window onto the screen by two projection panels and overhead projectors in the control room.   Spatial auditory cues are provided by 48 Blaupunkt 7.6-cm loudspeakers positioned behind the screen in eight concentric circular rings with radii between 12o and 45o.  Auditory stimuli are produced and controlled with TDT Technologiesí programmable modules. 

Dynamic Auditory, Visual  & Tactual Localization Laboratory.

Auditory, Visual and Tactual Localization Lab - and LA Lakers Shrine!Loudspeakers are located behind the curtain.
This laboratory has two 2.7 m  X 3.7 m  X 2.1 m IAC audiometric chambers.  One chamber is semianechoic, having Sonex acoustic foam panels on all surfaces.  Audio stimuli are generated with a Pentium microprocessor containing four Quatech 12-bit digital-analog convertors and waveform generators.  Each module has its own oscillator and 64k of memory.  In the other champber, two Quatech 12-bit digital-analog convertors control two Ling Dynamic Systemsí v200 vibrators.  This system provides precise control of the amplitude, frequency and waveform of the tactual stimulators.  Custom software, written in either Turbo Pascal or Matlab, controls all stimulus generation and response collection in both rooms. 

Tactual apparent motion apparatus.Wall of Shame


Students and Advising.

Research Assistants - Current.

 Marshall Dion is in the second year of the MS Human Factors Program, interested in aviation psychology.  He is currently working on auditory spatial cueing in the presence of background noise, which will be presented this summer at the International Conference on Human- Computer Interaction in Las Vegas.  Marshall is a Boeing Co. University Relations Scholarship this spring, and has been a student intern at Boeing in April 2004. 
Sekgomanyane Seeletso is a second year MS Human Factors student interested in human factors and human computer interaction, specifically novel technologies for input and output.  He is currently seeking internship opportunies and developing his thesis proposal.
Hugo Bertolloti is a second year MS Human Factors  student who is interested in human factors in aviation and UAV operator interfaces.  He is a Boeing University Relations Scholar, and is beginning an internship at Boeing this spring.  He will be presenting his research on audio spatial cueing in visual search with unncertain targets at the International Conference on Human- Computer Interaction in Las Vegas this summer.
Thuan ("Mary") Kim Ngo is a first year student in the MA Research program who is interested in human factors in air cockpits and air traffic controller interfaces.  Mary will present her research on multisensory audiovisual apparent motion at the Western Psychological Association Conference in Portland, OR this spring.  She won a Western Psychological Association Travel Scholarship for her work
Vanessa Chambers is completing her BA in Psychology this Spring.  She has research interests in aviation human factors, multisensory apparent motion and cognitive psychology.  She is applying to the MS Human Factors Program this spring,  Vanessa will present her research on multisensory audiovisual apparent motion at the Western Psychological Association Conference in Portland, OR this spring.  She won a Western Psychological Association Travel Scholarship for her work

Research Assistants - Alumni.

Peter Puchalsky is Principal Engineer/Scientist for Boeing Co
Dr. Wayne Neale is Director of the Customer Experience Group at Eastman Kodak Co.
Dr. Victoria Phillips is an Organizational Psychologist with Chase Bank and an Adjunct Professor of Applied Psychology at Arizona State University East. 
Steve Okamoto is User Interface Designer for eBay. Previously he was a user interface designer for IBM and Cadence Design.
Dr. Sherry Span is an Assistant Professor of Clinical Psychology at California State University Long Beach.
Dr. Darrell Rudmann completed his dissertation in Educational Psychology  at the University of Illinois.  He is a visiting Lecturer in the Psychology Department at  Indiana University East.
Dr. Kim-Phoung Le Vu is a Post Doctoral Associate and part time Lecturer at Purdue University.   Dr. Vu has accepted a tenure-track position in the Psychology Department at Cal State University Northridge starting Fall 2004.
Otilia Blaga completed the third year of her Ph.D. Program in Cognitve Psychology at Kansas Univeristy where she does research on the developmental congitive neuroscience of visual attention.
Simon Jeon is in his third year of the Cognitive Neuroscience Program at the University of Southern California.  He is currently doing research in the Laboratory of Brain Processes (LOBES).
Eishi Adachi completed his third year in the Ph.D. Program at University of Texas  Austin
Ken Fujimoto completed his Masters in Fine Arts at the University of Arizona last fall.  He is currently teaching introductory composition in the English Department and paying his rent with statistical consulting activities.
Adam Hornstein is a Human Factors Engineer with Hewlett Packard Corporation in San Diego, California.
Jason Lickelsuccessfully defended his Master Thesis "On the Salience of Auditory Cues: Effects of Frequency, Amplitude Change, and Spatial Location."  He has taken a position as Human Factors Engineer with Boeing Co.
Dan Reed  finished his Master Thesis "Improving Visual Search Performance: Relationship Between Auditory Spatial Cues and Urgency Mapping Paramters of Non-Verbal Auditory Warning Alarms."  He is currently a Usability Architect in the User Experience Group of Enterprise Rent A Car.
Diane Guettler  completed her  Masters Thesis "An Investigation of the Effects of Source Location, Timing and Separation on Apparent Motion in the Visual, Auditory and Tactile Modalities," and her thesis was nominated as Best Thesis in the Psychology Department.  She is currently working in human factors at Hewlett Packard Corporation in San Diego, CA.
Argie Vatakis spent  Spring 2004 in the Visual Brain Imaging Lab at the Max Planck Institute for Biological Cybernetics in Tubigen, Germany.  Argie is currently in the doctoral program in Experimental Psychology at Oxford University.  She will be working with Charles Spence in the Crossmodal Research Group.


CSULB Human Factors & Ergonomics Society Student Chapter
Center for Usability in Design and Asessment