IEEM 552 - Human-IEEM 552 - Human-Computer SystemsComputer Systems

Dr. Vincent Duffy - IEEMDr. Vincent Duffy - IEEM

Week 6 - An exampleWeek 6 - An exampleMarch 9, 1999March 9, 1999

http://www-ieem.ust.hk/dfaculty/http://www-ieem.ust.hk/dfaculty/duffy/552duffy/552

email: vduffy@ust.hkemail: vduffy@ust.hk1

A test of 2 interfacesA test of 2 interfaces

Self rating of Expertise for Library Online Searches

Human Subjects Consent Form Data sheet for data collector Data Sheet for Subject Introduction

– subjects will leave the room

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Self-rating and consent Self-rating and consent formform

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Data/instructions for data Data/instructions for data collectorcollector

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Data sheet for subjectData sheet for subject

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After collecting the dataAfter collecting the data run sample data previously collected run sample data previously collected

using SASusing SAS break break meet in LT-H after breakmeet in LT-H after break discuss hypotheses (with all students discuss hypotheses (with all students

present)present) consider how to analyze the dataconsider how to analyze the data consider the objectives of the data consider the objectives of the data

collection effortcollection effort

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Getting data for class Getting data for class demo (7 teams)demo (7 teams)

team #team # odd begin w/wwwodd begin w/www even begin w/doseven begin w/dos

Start point Start point

Sample data (9 teams)Sample data (9 teams) Go to 552 homepage Go to 552 homepage

hhttp://iesu5.ieem.ust.hk/dfaculty/duffy/552/index.htmlttp://iesu5.ieem.ust.hk/dfaculty/duffy/552/index.html download sample program and data (note the download sample program and data (note the

instructions) - used to illustrate SASinstructions) - used to illustrate SAS

some SAS commands you some SAS commands you needneed need a data file (example.txt) and a need a data file (example.txt) and a

program file (example.sas) program file (example.sas) – make sure the extensions are correct and make sure the extensions are correct and

that the location of the data file is correctly that the location of the data file is correctly noted in the programnoted in the program

– call program steps into Editor (open file)call program steps into Editor (open file)– submit (or F8)submit (or F8)– see listing of output (or F7)see listing of output (or F7)– check log output (for error checking) F6check log output (for error checking) F6– save and print files as neededsave and print files as needed– clear active window (Ctrl E)clear active window (Ctrl E)

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For assumptions of For assumptions of analyses/outputanalyses/output– see Cody and Smith or other Statistics see Cody and Smith or other Statistics

referencesreferences for help with syntax (error for help with syntax (error

checking) checking) – see help menussee help menus

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Interpretation of resultsInterpretation of results

What do I expect from the results/data?What do I expect from the results/data?– What is the objective of the testing?What is the objective of the testing?

What are the hypotheses? What are the hypotheses? – What questions am I trying to answer with What questions am I trying to answer with

the data/analyses?the data/analyses?– H.1. www search is faster.H.1. www search is faster.– H.2. More errors using www search.H.2. More errors using www search.– H.3. More data can be found by www.H.3. More data can be found by www.

Objective: Compare 2 interfaces.Objective: Compare 2 interfaces.11

Sample SAS screenSample SAS screen

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Sample SAS output/resultsSample SAS output/results

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What to look for in analysisWhat to look for in analysis

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For next weekFor next week 1. Read Chapt. 6 (Eberts p.126-138) (wk7)1. Read Chapt. 6 (Eberts p.126-138) (wk7) 2. Read Miller & Stanney IJHCI, 19972. Read Miller & Stanney IJHCI, 1997 3. Submit interpretation of results 3. Submit interpretation of results (email or fax)(email or fax)

– H.1. www search is faster.H.1. www search is faster.– H.2. More errors using www search.H.2. More errors using www search.– H.3. More data can be found by www.H.3. More data can be found by www.– Hwk. Agree/disagree, why? (answer all 3)Hwk. Agree/disagree, why? (answer all 3)

use results of the sample data (teams 1-9) to draw conclusions…use results of the sample data (teams 1-9) to draw conclusions…assume similar method was used to get the sample data used for assume similar method was used to get the sample data used for the SAS analysis…up to the SAS analysis…up to 1 page summary1 page summary

– hint : see Chapter 6 Cody and Smith (p.138-149)hint : see Chapter 6 Cody and Smith (p.138-149)

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Install SAS for Win95 & Update the LicenseInstall SAS for Win95 & Update the License ========================================== 1. Start --> Run -->1. Start --> Run --> 2. Click Browse2. Click Browse k:\Apps\SAS612\setupk:\Apps\SAS612\setup 3. Follow the default instruction3. Follow the default instruction 4. Choose ”typical" --> next4. Choose ”typical" --> next 5. Follow the instuctions until install finished5. Follow the instuctions until install finished ==================================== 1. Start --> Programs --> The SAS System --> Update SAS License1. Start --> Programs --> The SAS System --> Update SAS License InformationInformation 2. Update SAS License --> find a file "config.sas"2. Update SAS License --> find a file "config.sas" Browse --> K:\Apps\SAS612Browse --> K:\Apps\SAS612 3. Please verfy SAS root3. Please verfy SAS root C:\SASC:\SAS 4. Verify SASfolder4. Verify SASfolder k:\Apps\SAS612k:\Apps\SAS612 5. Is the files is in diskette/ networks?5. Is the files is in diskette/ networks? Click --> YesClick --> Yes 6. Verifiy a file "Setinit file"6. Verifiy a file "Setinit file" k:\Apps\SAS612\core\sasinstk:\Apps\SAS612\core\sasinst