Chapter 7: Data Gathering2/26/2013 1 Chapter 7: Data Gathering Anna Loparev Intro HCI 02/21/2013 Key Issues 2 Data gathering

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Chapter 7: Data Gathering Anna Loparev

Intro HCI

02/21/2013

Key Issues

2

Data gathering

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Setting goals

3

Key issues

Key Issues: Identifying Participants

4

Key issues

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Random sampling

5

Identifying Participants

http://starwars.wikia.com/wiki/Stormtrooper

6


http://starwars.wikia.com/wiki/Stormtrooper, http://kotaku.com/5650591/then-why-we-still-got-ewoks, http://simplicitymom.blogspot.com/2011/10/fishing-for-wookie.html

Stratified sampling

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Convenience sampling

7



Key Issues: Relationship with Participants

8

Key issues

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Clear and professional

9 http://starwars.wikia.com/wiki/Stormtrooper

Relationship with participants

• Confirm purpose

• Data use

• May withdraw

• OK to continue

Informed consent form

10



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• Analyze data

• Share info

• Publish reports

Data gatherer (You)

11


• Privacy

• Social security

• Child protection

Data provider (User)



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Exception to informed consent



Incentives

14


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Key Issues: Triangulation

15

Key issues

Data: Time

16

Triangulation

http://starwars.wikia.com/wiki/Stormtrooper, http://simplicitymom.blogspot.com/2011/10/fishing-for-wookie.html

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Data: Place

17

Triangulation


Data: People

18

Triangulation


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Investigator

19

Triangulation

Theory

20

Triangulation

Perceptual

Cognitive Motor

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Methodology

21

Triangulation


Key Issues: Pilot Studies

22

Key issues

http://www.collegefashion.net/inspiration/movie-inspiration-fashion-inspired-by-top-gun/

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Data Recording

23

Data gathering

Exceptions

24

Data recording


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Data Recording: Types

25

Data recording

Notes plus still camera

26

Types

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Audio plus still camera

27

Types

Video

28

Types

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Data Recording: Depends on…

29

Data recording

Context

30

Depends on…


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Time

31

Depends on…

http://starwars.wikia.com/wiki/Stormtrooper, http://simplicitymom.blogspot.com/2011/10/fishing-for-wookie.html

Sensitivity

32

Depends on…

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Data Recording: Affects…

33

Data recording

Detail

34

Data recording

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Intrusive

35

Data recording

Which to use?

36

Types

https://en.wikipedia.org/wiki/Mario

• Notes (hand-written)

• Notes (typed)

• Audio

• Photo

• Video

▫ Fixed/Roving

▫ Where to point

▫ Impact of recording

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Interviews

37

Data gathering

Interview Types

38

Interviews

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Unstructured

39

Interview Types


Structured


Interview Types

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Semi-structured


Interview Types

Focus group


Interview Types

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Interview Planning

43

Interviews

Develop questions

44

Interview planning

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Documents

45

Interview planning

Equipment

46

Interview planning

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Structure


Interview planning

Time and place

48 http://starwars.wikia.com/wiki/Stormtrooper, http://simplicitymom.blogspot.com/2011/10/fishing-for-wookie.html

Interview planning

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Prepare interview

49 https://en.wikipedia.org/wiki/Mario

• Goal

• Way of recording

• Open ended Qs

• Closed Qs

Interview planning

Running the Interview

50

Interviews

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Comfortable and informed


Running the interview

Listen



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Sympathy



Enjoy

54


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1. Introductions



2. Warm-up

56


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3. Main session



4. Cool-off

58


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5. Closing session



Perform interview


1. Introduction

2. Warm-up

3. Main session

4. Cool-off

5. Closing session


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Questionnaires

61

Data gathering

What and why

62 http://starwars.wikia.com/wiki/Stormtrooper, http://studentweb.cortland.edu/Karen.Jordan/miniproj3/election_questionnaire.html

Questionnaire

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Questionnaire Structure

63

Questionnaires

Start with demographic info

64


Questionnaire structure

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Order



Different versions

66 http://www.superrobin.com/free-gadgets/free-laptops


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Clear instructions

67


White space vs. compact

68


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Questionnaires: Q and A Format

69

Questionnaires

Check boxes and ranges

70

Q and A format

https://37signals.com/holiday/01_finders/by_age.html

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Rating Scales: Likert

71

Q and A format

http://blog.mrmeyer.com/?p=261, http://www.hkadesigns.co.uk/websites/msc/reme/likert.htm

Rating Scales: Semantic differential

72

Q and A format

http://www.wiscosurvey.com/webhelp/semantic-differential.htm, http://archive.ajpe.org/view.asp?art=aj690597&pdf=yes

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Rating Scales: Issues

73

Q and A format

http://blog.mrmeyer.com/?p=261, http://archive.ajpe.org/view.asp?art=aj690597&pdf=yes

Questionnaire


• Check box

• Range

• Likert

• Semantic differential

Q and A format

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Observation

75

Data gathering

Direct Observation in the Field

76

Data gathering

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Participation


Direct observation in field

Data

78


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Acceptance



Sensitive issues



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Perspectives

81



Include everyone

82 http://kotaku.com/5650591/then-why-we-still-got-ewoks,


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Notes



Direct Observation in the Field: Frameworks

84


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Simple example


Direct obs in field: Frameworks

Robson



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Robson: Space

87


Robson: Actors

88



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Robson: Activities



Robson: Objects



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Robson: Acts



Robson: Events



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Robson: Time

93 http://xtrapics.blogspot.com/2011/08/blog-post.html


Robson: Goals



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Robson: Feelings



Rogers and Bellotti



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Ethnography



Other Methods

98

Data gathering

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Direct observation in controlled environment

99

Other methods


Indirect observation

100

Other methods


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Choosing and Combining Techniques

101

Data gathering

Example

102

Choosing and combining techniques

www.id-book.com

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Think about

103

Choosing and combining techniques

• Focus

• Participants

• Nature of technique

• Available resources

https://en.wikipedia.org/wiki/Mario

• Interview

• Questionnaire

• Observation