HCI 3353 - Final

Question 1

What are the 4 input types?

Answer 1

selection, quantification, position, text

Question 2

What are some characteristics of bad interfaces?

Answer 2

hard to use, violates expectations, too many degrees of freedom

Question 3

What is SR (stimulus response) compatibility?

Answer 3

system does what you expected it to do

Question 4

TF: Input symbols for HCI’s can be event too

Answer 4

T

Question 5

TF: The set of all possible inputs is a set of events?

Answer 5

T

Question 6

What is the transition function?

Answer 6

Maps all sets of inputs to a next step and output

Question 7

Who proposed the gulf of evaluation and execution?

Answer 7

Don Norman

Question 8

What is the gulf of evaluation?

Answer 8

User should know what state they are in

Question 9

What is the gulf execution?

Answer 9

User should be able to complete their task easily

Question 10

What is the gulf of information?

Answer 10

A reference of how easy a machine is to use

Question 11

What does it mean if a gulfs are large?

Answer 11

bad user experience

Question 12

What are design artifacts?

Answer 12

deliverable that document design progress

Question 13

for any given task, what objectives measurements do you have and what are they measured by?

Answer 13

Selection / Text
- measured in: Time and Error rate

Quantifiers / Position
- measured in: Accuracy Speed

Question 14

Can you measure usability if the user does not have a task?

Answer 14

No - what in the titty boi are you going to measure??

Question 15

What is the relationship between speed and accuracy?

Answer 15

its a tradeoff, they cannot be decouples, more speed = less accuracy

Question 16

what are the units of performance for T, RT, (A/w) + 1, Log_10(x), Log_2(x), Log_2(A/W + 1)

Answer 16

seconds, seconds, dimensionless (A and W are always the same units), Bels, bits, bits

Question 17

what does it mean if units or types are “strongly typed”

Answer 17

strongly typed language has stricter typing rules at compile time, which imply that errors and exceptions are more likely to happen during compilation

Question 18

why does log_2 have the dimensions that it does? (why does it make sense)

Answer 18

1 bit difficulty is equal to a screen split in half (50% change in difficulty) and because bits are a measurement of spatial resolution

Question 19

what is performance equal to?

Answer 19

speed x accuracy

Question 20

what is an interface?

Answer 20

the boundary between two things?

Question 21

what type of input is a webcam?

Answer 21

depends what it’s being used for (voice recognition - text)

Question 22

what is a “haptic device”?

Answer 22

one that constrains the relationship between force and position - applies tactile sensation to an interaction with a computer

Question 23

what is absolute position?

Answer 23

input and output have a 1:1 relationship

Question 24

what is relative position

Answer 24

speed and accuracy tradeoff, returns “best guess”

Question 25

what is a isometric device?

Answer 25

position does not change and it senses force

Question 26

what s an isotonic device?

Answer 26

position changes, force does not change (or its not measured)

Question 27

what does intuitive mean?

Answer 27

just works the way you think it will

Question 28

what is stimulus response compatibility?

Answer 28

``` things works how you'd expect kinetically example) driving a car: - turn left, go left - turn right, go right ```

Question 29

what is the novice to expert continuum?

Answer 29

lots of interfaces are arranged so they are functional in the hands of a novice and maximized in the hands of an expert

Question 30

what is the best approach to working with the novice to expert continuum?

Answer 30

try to accommodate the largest possible part of the continuum

Question 31

what are the 3 categories of assistance for novices?

Answer 31

constraints, forgiving features, learnability

Question 32

What are "training wheels"?

Answer 32

degrees of freedom removed to prevent some consequence

Question 33

what is an example of a forgiving feature?

Answer 33

"are you sure?" alerts when deleting or making changes to something

Question 34

not having a seamless connection between intent and command is an example of what?

Answer 34

gulf of execution

Question 35

needing many long interactions to perform a task is an example of what?

Answer 35

gulf of execution

Question 36

a user taking a long time to understand some stimulus is an example of what?

Answer 36

gulf of evaluation

Question 37

what are the three things that humans have on their side of the human computer boundary?

Answer 37

cognition, perception and action

Question 38

what are some examples of design artifacts?

Answer 38

usage scenarios, user stories, use case diagrams, srs document, state diagram, sequence diagram

Question 39

what are the two components of an srs diagram?

Answer 39

functional and structural

Question 40

what is the impact of OOP (object oriented programming)?

Answer 40

increased modifiable and extensible, makes coding easier since you have classes in separate files

Question 41

what is bauhaus design?

Answer 41

form follow function

Question 42

what are some typical problems of requirements elicitation?

Answer 42

ambiguous, incomplete, inconsistent

Question 43

how does one get requirements form users?

Answer 43

user stories

Question 44

why was the C language developed?

Answer 44

to make writing assembly easier

Question 45

what type of mapping is there between the conceptual and physical domain?

Answer 45

one to one

Question 46

what is in a functional behavioral description?

Answer 46

states, inputs, outputs

Question 47

what is in a structural description?

Answer 47

"where" things are in the system

Question 48

TF: a sequence diagram is both a structural and functional description of a system? why or why not?

Answer 48

T object across top represent structure interaction below describe function

Question 49

what are the 5 levels of abstraction from abstract to concrete?

Answer 49

1. informal behavioral descriptions 2. usage scenarios 3. UML charts 4. Hierachical Statechart 5. Source Code

Question 50

what are the only 4 types of relationships between 2 objects?

Answer 50

association, composition, aggregation, dependency

Question 51

if a child cannot exist without a parent, what type of relationship is described?

Answer 51

composition

Question 52

if a child can exist without the parent, what type of relationship is described?

Answer 52

aggregation

Question 53

importing the declaration of another class for compilation is what type of relationship?

Answer 53

dependency

Question 54

once a button is instantiated in java what do we still need to do?

Answer 54

associate it to a type of container (ex. a frame)

Question 55

what things happen when you let a web app interact with a users machine

Answer 55

bad bad things

Question 56

TF: in java API are components also containers?

Answer 56

T

Question 57

a frame processes all _____ and passes them to the container of a component that has the appropriate __________

Answer 57

events, event listener

Question 58

what is passed in the parameter of an event listener?

Answer 58

the context

Question 59

what is the capacity equation in terms of bandwidth?

Answer 59

capacity = band width * log[(signal/noise) + 1 ]

Question 60

you assess your target/goal with respect to what you perceive you're what to be?

Answer 60

current state/location

Question 61

what are 4 methods of scenario generation?

Answer 61

interactive observation, structured interviews, "As Is" scenario, responsibility

Question 62

how does a java applet work?

Answer 62

JRE packages the event and the object that the event occurred on and passes it to the action method

Question 63

what are the different types of AWT events and what are their parameters?

Answer 63

``` action event (selection) adjustment event (quantification) component event ("os event") - window, key, input, focus, draw.... item event (selection) text event (text) ```

Question 64

what is the halo effect?

Answer 64

if you like the person who is doing the study you are likely to perform better

Question 65

what does "a" represent in the fitts law equation?

Answer 65

the start/stop time of the evice

Question 66

what does "b" represent in the fitts law equation

Answer 66

the inherent `/speed of the device - determined experimentally

Question 67

what is it called when something is segmented into objects

Answer 67

parsing