Post on 18-Jan-2018
description
SPSS and surveys
Chris CarrollResearch Associate
ScHARR, University of Sheffield
Module Tutor: Analysis of Health Information, MSc in Health Informatics, Dept. of Information Studies,
University of Sheffield
SPSS
• This presentation offers a brief introduction to the SPSS for Windows, including:
– Introduction and what is good about SPSS– Viewing and manipulating data– Generating graphs and data tables– Some references
Introduction
• SPSS is a software package used for:
– conducting statistical analyses– manipulating data– generating tables and graphs that summarize
data
Introduction
• SPSS analyses quantitative, that is, numeric data
• Survey data must be numeric or converted to numeric values for analysis in SPSS
• Numbers can be assigned to qualitative survey responses, for example, Agree=1, Unsure=2, Disagree=3
What is good about SPSS?
• Easy-to-use pull-down menus, like Microsoft XP/Office
• Users do not need to know complex statistical equations to use SPSS
• SPSS is like a calculator: users enter the numbers and select the tasks, and the software does the rest
What is good about SPSS?
• Results are clearly presented• Tables and graphs can be copied directly
from SPSS into Word files
Viewing survey data
• When SPSS opens a data file it displays it in the Data Editor
• The Data Editor allows you to view, add, delete, manipulate and analyse data using the commands available through drop-down menus and sub-menus
Viewing data: Variable View
Viewing data: Data View
Graphs and tables
• It is possible to produce basic descriptive statistics for your survey data in the form of both graphs and frequency tables
• The results appear in the Output View of SPSS
Graphs and tables
• Example SPSS bar chart
Long loanShort loan
ReferenceNewspapers / magazines
Library collection
0
100
200
300
400
500
Library collection
Graphs and tables
• Example SPSS pie chart Long loan
Short loanRefernceNewspapers / magazinesdMissing
Library collection
Graphs and tables
• Example SPSS frequency tables
Statistics
Marital Status(1985)1034
82.032.00
11.013
ValidMissing
N
MeanMedianModeStd. Deviation
Library Collection
485 46.5 46.9 46.962 6.0 6.0 52.9
457 43.9 44.2 97.130 2.9 2.9 100.0
1034 99.2 100.08 .8
1042 100.0
Long loanShort loanReferenceNewspapers / magazinesTotal
Valid
SystemMissingTotal
Frequency Percent Valid PercentCumulative
Percent
Librarianship, surveys and SPSS
• Many information / librarianship studies use SPSS to analyse survey data. Some recent examples:
– Auster E. & McDiarmid M. (2005). Using volunteers in Ontario hospital libraries: views of library managers. Journal of the Medical Library Association. 93 (2), 253-62.
– Rice DM. & Starner ME. (2004). Surveying the stacks collecting data and analyzing results with SPSS. Library Resources and Technical Services. 48 (4), 263-72.
– Cardina C. & Wicks D. (2004). The changing roles of academic reference librarians over a ten-year period. Reference & User Services Quarterly. 44 (2), 133-42.
References
• Swinscow TDV. (1997). Statistics at Square One. 9th edition. BMJ. http://bmj.bmjjournals.com/collections/statsbk/index.shtml (Accessed 10 May 2006)
• Driscoll P. et al (2000). An introduction to everyday statistics—1. Journal of Accident and Emergency Medicine, 17 (3), 205-211. http://emj.bmjjournals.com/cgi/content/full/17/3/205-a (Accessed 10 May 2006)