Randomization to Randomization Probability: Estimating Treatment Effects Under Actual Conditions of Use
Principal Investigator(s): View help for Principal Investigator(s) David B. Allison, University of Alabama at Birmingham
Version: View help for Version V1
Version Title: View help for Version Title Initial upload on 5/22/2017
Name | File Type | Size | Last Modified |
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Data-Dictionary-for-ICPSR.docx | application/vnd.openxmlformats-officedocument.wordprocessingml.document | 18 KB | 05/17/2017 07:26:AM |
R2R-pilot-data-for-ICPSR.xlsx | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | 100 KB | 05/17/2017 07:28:AM |
r2rpilot_analysis_rc2.sas | application/x-sas | 40.7 KB | 05/17/2017 07:26:AM |
Project Citation:
Allison, David B. Randomization to Randomization Probability: Estimating Treatment Effects Under Actual Conditions of Use. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2017-05-22. https://doi.org/10.3886/E100640V1
Project Description
Summary:
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This folder contains the data, code, and data dictionary required to reproduce the caffeine pilot study results published in our Psychological Methods manuscript: Randomization to Randomization Probability: Estimating Treatment Effects Under Actual Conditions of Use.
Funding Sources:
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United States Department of Health and Human Services. National Institutes of Health. National Institute of Diabetes and Digestive and Kidney Diseases (P30DK056336);
United States Department of Health and Human Services. National Institutes of Health. National Institute of Diabetes and Digestive and Kidney Diseases (T32DK062710);
United States Department of Health and Human Services. National Institutes of Health. National Institute of Diabetes and Digestive and Kidney Diseases (R25DK099080);
United States Department of Health and Human Services. National Institutes of Health. National Heart Lung and Blood Institute (R25HL124208)
Scope of Project
Subject Terms:
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caffeine;
randomization method;
vigilance;
mood;
randomized controlled trial;
probability;
expectations
Geographic Coverage:
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Alabama
Time Period(s):
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6/2/2015 – 10/16/2015
Collection Date(s):
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7/16/2015 – 10/16/2015
Universe:
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The inclusion criteria of the study were: age≥18;
willingness to take 2 caffeine or placebo pills; willingness to abstain from
caffeine for 12 hours prior to study visit (8:30pm-8:30am); UAB employees or
students with some college education (including current enrollment). The
exclusion criteria were: uncorrected vision problems; nicotine use; use of medications
for sleep, anxiety, and/or ADHD; pregnant or trying to get pregnant; lactose
intolerance.
Data Type(s):
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experimental data;
other;
survey data
Collection Notes:
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See the Methods section of our publication for complete details on data collection.
Methodology
Response Rate:
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Three hundred forty-one subjects were screened over the phone for eligibility. Of those, 205 attended the single study visit and completed the study. After participation, 5 subjects were deemed ineligible by study staff and were not included in the outcome analysis. The analytic sample size was 200 subjects.
Sampling:
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Convenience sampling
Data Source:
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Individuals
Collection Mode(s):
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cognitive assessment test;
on-site questionnaire;
other
Scales:
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The POMS-2 questionnaire employs a Likert-type scale for response options. See the attached Data Dictionary for the exact response options.
Weights:
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N/A
Unit(s) of Observation:
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Individuals
Geographic Unit:
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N/A
Related Publications
Published Versions
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This material is distributed exactly as it arrived from the data depositor. ICPSR has not checked or processed this material. Users should consult the investigator(s) if further information is desired.