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Second Young Adult Naturalistic Alcohol Study (YANAS-2)

This study has been completed.
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Information provided by (Responsible Party):
Yale University Identifier:
First received: January 24, 2013
Last updated: April 25, 2017
Last verified: January 2016

This study involves completion of questionnaires, computer-based cognitive tasks and an alcohol drinking session. Participation in this study consists of an initial, in-person screening appointment, 4 brief daily appointments at the research office, an alcohol drinking session at a local bar and a follow-up appointment 1-3 days after the alcohol drinking session.

Participants who are found to be eligible in the screening phase will then complete a daily appointment for 4 days out of a 5-day period (i.e., there will be 1 day out of the 5 on which they will not attend an appointment). Each appointment will last 20 minutes, on average and consist of a questionnaire and computer-based cognitive task. On the day of the fourth appointment, participants will complete an alcohol drinking session. The alcohol drinking session begins at 4pm and lasts until at least midnight.

Participants in this study will be young adults between the ages of 21-25, who regularly drink alcohol and are not currently seeking treatment for alcohol use. Seventy-two participants will complete this study.

Young Adult Alcohol Drinking

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Second Young Adult Naturalistic Alcohol Study (YANAS-2)

Resource links provided by NLM:

Further study details as provided by Yale University:

Primary Outcome Measures:
  • Peak estimated blood alcohol concentration [ Time Frame: During a 3-hour alcohol drinking period ]

Secondary Outcome Measures:
  • Number of alcoholic drinks consumed [ Time Frame: During a 3-hour alcohol drinking period ]

Other Outcome Measures:
  • Self-reported drinks per drinking day [ Time Frame: 6- and 12-month follow-ups after alcohol drinking session ]
  • Self-reported frequency of heavy drinking days [ Time Frame: 6- and 12-month follow-up after alcohol drinking session ]

Enrollment: 69
Study Start Date: January 2013
Study Completion Date: October 2016
Primary Completion Date: November 2015 (Final data collection date for primary outcome measure)
Young adult alcohol drinkers
Young adults between the ages of 21-25 who regularly drink alcohol


Ages Eligible for Study:   21 Years to 25 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Healthy young adults between the ages of 21-25 years of ago who regularly drink alcohol and are not currently seeking treatment for alcohol.

Inclusion Criteria:

  • Be between the ages of 21-25.
  • Be able to read English and complete study evaluations.
  • Drink alcohol on a regular basis

Exclusion Criteria:

No participant may:

  • Be seeking treatment for alcohol or other addictive behaviors or have been in inpatient or intensive outpatient treatment within the past 12 months.
  • Provide two positive breath alcohol concentration (BAC) readings (i.e., > 0.00%) at any of the following times: in-person screening, a pre-session screening, or at the outset of an alcohol self-administration session. After participants blow their first positive BAC, they will be allowed to reschedule and participate at another time, however if they blow a second positive BAC, they will be excluded from this study and offered referrals for alcohol treatment.
  • Have positive urine screen results at the in-person screening or pre-session screening on the day of an alcohol self-administration session for opiates, cocaine, phencyclidine, amphetamines, methamphetamine, barbiturates, methadone or benzodiazepines.
  • A woman who is pregnant, nursing, or refuses to use a reliable method of birth control.
  • Fail to perform at a normative level at screening on any of the four cognitive and psychomotor tasks administered in this study. Participants must perform within two standard deviations of the mean from the samples in relevant prior studies
  • Perform computer tasks initially administered at baseline in either a random or inordinately slow fashion
  • A body mass index lower than 18.5 or greater than 35.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01780805

United States, Connecticut
Yale University School of Medicine
New Haven, Connecticut, United States, 06519
Sponsors and Collaborators
Yale University
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Principal Investigator: Robert F Leeman, Ph.D. Yale University
  More Information

Responsible Party: Yale University Identifier: NCT01780805     History of Changes
Other Study ID Numbers: 1209010754
Study First Received: January 24, 2013
Last Updated: April 25, 2017

Additional relevant MeSH terms:
Alcohol Drinking
Drinking Behavior
Anti-Infective Agents, Local
Anti-Infective Agents
Central Nervous System Depressants
Physiological Effects of Drugs processed this record on August 18, 2017