Human computer interaction Semester 1

Human computer interaction Semester 1

• 1.
  Human Computer Interaction HarisaMardiana
• 2.
  An Overview What isHuman Computer Interaction (HCI)? 􀂃 Importance of HCI 􀂃 Good and Poor Design Examples 􀂃 What and Who are involved in HCI design? 􀂃 General Principles of HCI Design
• 3.
  What is HCI? HowHuman interacts with Computer: - Not primarily the study of Human - Not primarily the study of Computer - The study of bridge between them, which includes - Observation of interactions between people & computers, e.g., Find examination papers via our library Web • 􀂃
• 4.
  Continued… Analysis of theinvolved interactions, e.g., Are all the steps involved are necessary? Human consequences after interacting with computers, e.g., Can the user perform his task? Does he enjoy working with the computer?
• 5.
  The term HCIwas adopted in mid- 1980s: • Association for Computing Machinery (ACM): “discipline concerned with the design, evaluation & implementation of interactive computer systems for human use & with the study of major phenomena surrounding them” (1992). • Dix: “HCI is study of people, computer technology and the ways these influence each other. We study HCI to determine how we can make this computer technology more usable by people” (1998).
• 6.
  • Carroll: “HCIis the study and practice of usability. It is about understanding and creating software and other technology that people will want to use, will be able to use, and will find effective when used.” (2002)
• 7.
  • Human: Individual user,a group of users working together, a sequence of users in an organization. • Computer: Desktop computer, large-scale computer system, Pocket PC, embedded system (e.g., photocopier, microwave oven), • software (e.g., search engine, word processor)
• 8.
  • User interface: Partsof the computer that the user contacts with • Interaction: Usually involve a dialog with feedback & control throughout performing a task (e.g., user invokes “print” command and then interface replies with a dialog box)
• 9.
  Why HCI? • Inthe past, computers were expensive & used by technical people only. • Now, computers are cheap and used by non- technical people (different backgrounds, needs, knowledge, skills) ⇒ Computer and software manufacturers have noticed the importance of making computers “user-friendly”: • easy to use, save people time, etc.
• 10.
  How to achieve“user-friendliness” in computer design? • HCI Scope • Use & Context: Find application areas for computers • Human: Study psychological & physiological aspects e.g., study how a user learns to use a new product, study human typing speed
• 11.
  • Computer: Hardware& software offered e.g., input & output devices, speed, interaction styles, computer graphics. • Development: Design, implementation & evaluation.
• 12.
  HCI
• 13.
  HCI Goals • Atphysical level, HCI concerns the selection of the most appropriate input devices and output devices for a particular interface or task. • Determine the best style of interaction, such as direct manipulation, natural language (speech, written input), • WIMP (windows, icons, menus, pointers), etc.
• 14.
  Develop or improve 􀂃Safety 􀂃 Utility 􀂃 Effectiveness 􀂃 Efficiency 􀂃 Usability 􀂃 Appeal of systems that include computers
• 15.
  • Safety: protectingthe user from dangerous conditions and undesirable situations. • Users 􀂃Nuclear energy plant or bomb-disposal – operators should interact with computer- based systems remotely 􀂃 Medical equipment in intensive care unit (ICU)
• 16.
  • Data  Preventuser from making serious errors by reducing risk of wrong keys/buttons being mistakenly activated.  Provide user with means of recovering errors
• 17.
  • Ensure privacy(protect personal information such as habits and address) & security (protect sensitive information such as passwords, VISA card numbers)
• 18.
  HCI Goal • Utility:extent of providing the right kind of functionality so that users can do what they need or want to do. • High utility: Scientific calculator provides many mathematical operations, built-in formulae, and is programmable. • Low utility: Software drawing tool does not allow free-hand drawing but supports polygon shape drawing
• 19.
  • Effectiveness: concerna user’s ability to accomplish a desired goal or to carry out work • Find a master thesis in our library Web
• 20.
  The Impact ofHCI  Productivity Increases  Reduce training, workshop, etc  Prevent employees taking  Satisfaction  Good quality and good product.
• 21.
  Impact to StudyProgram