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Using SDA Services @ ICPSR Part II

Using SDA Services @ ICPSR Part II. ACCOLEDS / DLI Training 2003 December 8 – 10 University of Calgary Walter Piovesan. Contents Roadmap. Overview of SDA Features Online Tools: Using the ICPSR Data Analysis System (DAS) SAMHDA’s TEDS QuickTables SDA: Mucking about with Data.

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Using SDA Services @ ICPSR Part II

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  1. Using SDA Services @ ICPSRPart II ACCOLEDS / DLI Training 2003 December 8 – 10 University of Calgary Walter Piovesan Accoleds/DLI Training 2003 University of Calgary

  2. Contents Roadmap • Overview of SDA • Features • Online Tools: Using the ICPSR Data Analysis System (DAS) • SAMHDA’s TEDS QuickTables • SDA: Mucking about with Data Accoleds/DLI Training 2003 University of Calgary

  3. Overview of SDA • SDA (Survey Documentation & Analysis) • Developed at UC, Berkeley • Web software to perform simple data analysis • Tool for Teaching & Classroom use • No need for stats packages on local computers • Browse codebooks • No need to download data & docs • Create summary statistics for reports Accoleds/DLI Training 2003 University of Calgary

  4. SDA Features • browse codebooks, questionnaires, documentation • statistical procedures: eg. list values, frequencies, crosstabs, … • manipulate variables eg. Recode, compute new variables, … • custom subsets of selected variables and cases • codebook open in a separate window • download all : data, SPSS/SAS def, docs Accoleds/DLI Training 2003 University of Calgary

  5. Online Analysis Using the Data Analysis System (DAS) • 150 studies available in SDA format • DAS studies related to: • Aging • Criminal Justice • Education • Substance Abuse & Mental Health Accoleds/DLI Training 2003 University of Calgary

  6. Online Analysis Using the Data Analysis System (DAS) • Special Topic Archives With their Web Sites: • Census 2000 at ICPSR • Election 2000 at ICPSR • General Social Survey (GSSDIRS) • Health and Medical Care Archive (HMCA) • Homicide Research Working Group (HRWG) • International Archive of Education Data (IAED) • National Archive of Computerized Data on Aging (NACDA) • National Archive of Criminal Justice Data (NACJD) • Site for Instructional Materials and Information (SIMI) • Substance Abuse & Mental Health Data Archive (SAMHDA) Accoleds/DLI Training 2003 University of Calgary

  7. Quick Tables ( source www.DrugAbuseStatistics.samhsa.gov ) • Substance Abuse & Mental Health Data Archive (SAMHDA) has new feature: QuickTables • Produces analytic tables via drop down –menus • Available for all Treatment Episode Data Sets (TEDS) Accoleds/DLI Training 2003 University of Calgary

  8. Quick Tables … ( source www.DrugAbuseStatistics.samhsa.gov ) • six easy steps to use Quick Tables • start: http://www.icpsr.umich.edu/SAMHDA Accoleds/DLI Training 2003 University of Calgary

  9. Quick Tables …..( source www.DrugAbuseStatistics.samhsa.gov ) • Step 1: Select “Online Analysis” from the SAMHDA front page (http://www.icpsr.umich.edu/SAMHDA) • Step 2: Select the Treatment Episode Data Set. • Step 3: In the Quick Tables section, select the TEDS 1992-2000 concatenated file. This produces a list of the available Quick Tables for the selected file (see Figure 1) Accoleds/DLI Training 2003 University of Calgary

  10. Quick Tables …..( source www.DrugAbuseStatistics.samhsa.gov ) • Step 4: Select desired Quick Table. For the example, select “Client Characteristics by Year”. • Step 5: Left-click on the drop-down menus to select variables for the table(2). Custom Quick Tables may be generated for 11different client characteristics(3) for an individual State or for all States combined. For the example, select “Employment Status” as the client characteristic and limit the table to Maryland. The completed input screen is shown in Figure 2. Accoleds/DLI Training 2003 University of Calgary

  11. Accoleds/DLI Training 2003 University of Calgary

  12. Quick Tables …..( source www.DrugAbuseStatistics.samhsa.gov ) • …Explanation of Results is found on the final page (cases, desc vriables, publications, citations etc) …… (flip) Accoleds/DLI Training 2003 University of Calgary

  13. Hands on: Mucking about with Data via SDA • Online Tutorial: http://sda.berkeley.edu:7502/man3h/uindex.html • The Web-based SDA programs are intended to be self-explanatory, and there is online help available within each program. • But you can also access the help files at the Online Tutorial page. • Quick Exercise ….. Accoleds/DLI Training 2003 University of Calgary

  14. Hands on: Mucking about with Data via SDA1 Quick Exercise ….. • Example : using SAMHDA data examine association between marijuana use and cigarette smoking. • www.icpsr.umich.edu/SAMHDA Accoleds/DLI Training 2003 University of Calgary

  15. Hands on: Mucking about with Data via SDA2 Select data file…. • National Household Survey on Drug Abuse • Then select most recent study ( 2001)… Accoleds/DLI Training 2003 University of Calgary

  16. Hands on: Mucking about with Data via SDA3 Consult Codebook…. • May be opened in a separate window Accoleds/DLI Training 2003 University of Calgary

  17. Hands on: Mucking about with Data via SDA4 Look for variables…. • “Have you ever smoked a cigarette” • “Have you ever, even once, used marijuana or hashish” Accoleds/DLI Training 2003 University of Calgary

  18. Hands on: Mucking about with Data via SDA5 Finding out about variables…. • Double click on variable name to learn additional information … Accoleds/DLI Training 2003 University of Calgary

  19. Hands on: Mucking about with Data via SDA6 Analyse variables…. • Perform crosstabulation of variables to determine if “Cigarette smoking contributes to a higher probablity of marijuana use” …. (Click Start)

  20. Hands on: Mucking about with Data via SDA7 Enter variables…. • Fill in the variable name in the ROW and COLUMN fields. • Recode variables (R: 1=1,3 "yes”; 2 = 2,4 "no") then RUN Table • (NHSDA Uses “logically assigned” valus for cases where respondents have not responded but answer can be infered. Explained in codebook.

  21. Hands on: Mucking about with Data via SDA8

  22. Hands on: Mucking about with Data via SDA • “play it again sam”: • Using the GSS survey at ICPSR • http://www.icpsr.umich.edu:8080/GSS/homepage.htm • GSS 1972-2002 Cumulative Datafile • Examine if there are any differences in the "feelings of God" amoung Married people and those who have Never Married? • Use GSS 1972-2002 Cumulative datafile choose NEARGOD & MARITAL variables • Filter out other categories (2,3,4) Accoleds/DLI Training 2003 University of Calgary

  23. Hands on: Mucking about with Data via SDA • “play it again sam”:

  24. Hands on: Mucking about with Data via SDA

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