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SPSS for beginners, Part 3
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Transcript of SPSS for beginners, Part 3
Part 3: Survey data; Useful SPSS tools
Dr.
Ch
rist
ine
Pere
ira
Dr.
Ch
rist
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Pere
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» Entering data from a survey
» Compute a total score and mean score
» Recode variables
» Select cases to analyse
» Analyse separate groups of data
ASK at Brunel (2013) 2
What are the variables?
Dr.
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ASK at Brunel (2013) 3
Yes No Do you try to minimise your carbon footprint? (please tick one)
What is your gender? (please circle one) Male Female
What is your age?
(please tick one)
18-25
26-35
36-45
46-55
56+
Single response survey questions. Each question is a new variable.
Select ‘ONE’ Response Questions What is your main mode of transport to Uni during the week?
(please tick one)
Car
Bus
Tube
Rail
Walk
Cycle
Other: ____________
Dr.
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ASK at Brunel (2013) 4
Select ONE response
Participant Gender Age Group Mode CO2
1 Male 36-45 Car No
2 Male 26-35 Tube Yes
3 Female 46-55 Car No
4 Male 18-25 Tube Yes
5 Female 26-35 Rail Yes
Single response survey questions. Each question is a new variable.
Dr.
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ASK at Brunel (2013) 5
Which mode(s) of transport do you usually take to get to Uni during the week?
(please tick all that apply)
Car
Bus
Tube
Rail
Walk
Cycle
Other: ____________
‘tick all…’ instead of ‘tick one’
Multiple Response Questions
Dr.
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ASK at Brunel (2013) 6
Multiple response
Participant Transport
1 Car
2 Bus, Tube
3 Car
4 Tube, Rail, Walk
5 Bus, Rail
Can we enter responses like this?
Dr.
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ASK at Brunel (2013) 7
Multiple response
Participant Transport
1 Car
2 Bus, Tube
3 Car
4 Tube, Rail, Walk
5 Bus, Rail
Can we enter responses like this?
Why not?
Dr.
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ASK at Brunel (2013) 8
Multiple response
Participant Transport
1 Car
2 Bus, Tube
3 Car
4 Tube, Rail, Walk
5 Bus, Rail
Can we enter responses like this?
Why not?
Only ONE response per cell for statistical analysis
Dr.
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ASK at Brunel (2013) 9
Participant Car Bus Tube Rail Walk Cycle
1 Yes No No No No No
2 No Yes Yes No No No
3 Yes No No No No No
4 No No Yes Yes Yes No
5 No Yes No Yes No No
Multiple response survey question Each response is a new variable
Multiple response
Dr.
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ASK at Brunel (2013) 10
Participant Car Bus Tube Rail Walk Cycle
1 Yes No No No No No
2 No Yes Yes No No No
3 Yes No No No No No
4 No No Yes Yes Yes No
5 No Yes No Yes No No
Multiple response survey question Each response is a new variable
Multiple response
Yes = They travel by car No = They do not travel by car
Dr.
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ASK at Brunel (2013) 11
Participant Car Bus Tube Rail Walk Cycle
1 Yes No No No No No
2 No Yes Yes No No No
3 Yes No No No No No
4 No No Yes Yes Yes No
5 No Yes No Yes No No
Multiple response survey question Each response is a new variable
Multiple response
Yes = They travel by bus No = They do not travel by bus
Dr.
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ASK at Brunel (2013) 12
» Obtain preferential judgements or opinions.
Rank the following subjects from 1-5 based on how much you like them.
(1 = Favourite, 5 = Least favourite)
History
Science
Math
Writing
IT
Rank in order of importance, from 1-5, the following features when considering
a destination for your holiday.
(1 = Most important)
I’ve never been before
Weather
Surroundings
Cost
Accommodation
These also are multiple response questions
Ranked Response Questions
Dr.
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ASK at Brunel (2013) 13
Participant Never been Weather Surroundings Cost Accommodation
1 Most Impt 4 2 3 5
2 5 2 3 Most Impt 4
3 5 Most Impt 2 4 3
4 3 4 5 Most Impt 2
5 4 2 Most Impt 5 3
Multiple response survey question Each response is a new variable
Ranked multiple response
Dr.
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ASK at Brunel (2013) 14
» Obtain preferential judgements or opinions
Likert scale: Level of agreement
Other scales: Level of importance or satisfaction
How important are the following when considering where to live?
Very Important
Important I don’t know Unimportant Very
Unimportant
Cost 1 2 3 4 5
Distance to Uni 1 2 3 4 5
Distance to work 1 2 3 4 5
I feel safe 1 2 3 4 5
(circle one)
Scaled Response Questions
Dr.
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ASK at Brunel (2013) 15
Participant Cost Dist Uni Dist Work Safety
1 Very Impt Important I don’t know Important
2 Important Very Impt Very Impt Important
3 Unimportant Very Impt Important Very Impt
4 Unimportant I don’t know Important Important
5 Very Impt Important Important Very Impt
Single response survey questions. Each question is a new variable.
Scaled multiple response
Dr.
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ASK at Brunel (2013) 16
Using the ‘Compute variable’ tool
Dr.
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ASK at Brunel (2013) 17
Reverse coding or regroup responses
Dr.
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ASK at Brunel (2013) 18
Select specific cases of the data to analyse
Dr.
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ASK at Brunel (2013) 19
Analyse groups separately
Dr.
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ASK at Brunel (2013) 20
Dr.
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ASK at Brunel (2013) 21
Two methods:
1. ‘Explore’ option 2. Split file, then ‘Frequencies’
option We will use the 2nd method.
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ASK at Brunel (2013) 22
Dr.
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Use descriptives to summarise the relationship between Annual Income split by Gender
What is your gross annual income? 1
2 Gender (please tick one)
Male
Female
ASK at Brunel (2013) 23
Dr.
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ASK at Brunel (2013) 24
Categorical Variable
Output for males and females will be
in one table
Separate output tables for males
and females
File must be sorted!
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ASK at Brunel (2013) 25
The file is sorted All females are listed first,
then all males
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ASK at Brunel (2013) 26
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Now get stats for Annual Income • Use ‘Frequencies’ • Output will be split by Gender
ASK at Brunel (2013) 27
Use descriptives to summarise the relationship between Annual Income split by Gender
Dr.
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ASK at Brunel (2013) 28
Dr.
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Use descriptives to summarise the relationship between Annual Income split by Gender
Split File Option to Compare Groups
Output for males and females is in one table
ASK at Brunel (2013) 29
Separate output tables for males
and females
Dr.
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ASK at Brunel (2013) 30
Dr.
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Use descriptives to summarise the relationship between Annual Income split by Gender
Split File Option to Organise Output by Groups
Separate output table for males and females
ASK at Brunel (2013) 31
Dr.
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When finished, return the file to normal.
ASK at Brunel (2013) 32
Dr.
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ASK at Brunel (2013) 33