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Reducing pre-drinking alcohol consumption and alcohol-related harm in university undergraduates: A randomized controlled trial of a psychological theory-based intervention

A randomized controlled trial of a psychological theory-based intervention to reduce pre-drinking alcohol consumption and alcohol-related harm in university undergraduates

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12614001102662
Enrollment
341
Registered
2014-10-16
Start date
2015-07-27
Completion date
Unknown
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

The present study investigates a psychological theory-based intervention to reduce alcohol pre-drinking - the practice of consuming alcohol at a home or private residence, prior to attending a subsequent event (where alcohol consumption often continues). The intervention comprises a motivational component that facilitates autonomous motivation to reduce pre-drinking alcohol consumption, and a volitional component that enables participants to generate their own 'if-then' plans to enact in response to contextual cues surrounding pre-drinking. The intervention comprises four conditions: an autonomy support only, an implementation intention only, a combined, and control condition. The control condition will receive information from the National Health and Medical Research Council guidelines with respect to consuming alcohol in moderation to reduce the risk of alcohol-related harm. It is hypothesized that the controlled condition targeting both motivational and volitional aspects will be most effective in reducing pre-drinking alcohol consumption and alcohol-related harm.

Interventions

Participants will be randomly allocated to one of four conditions: (1) autonomy support, (2) implementation intention, (3) combined autonomy support and implementation intention, and (4) a control. Intervention components have been developed and written by the researchers, and will be automatically presented to participants as they progress through an online survey tool (Qualtrics). The one-time intervention will be of approximately 30-minute duration, depending on participants' progression thro

Participants will be randomly allocated to one of four conditions: (1) autonomy support, (2) implementation intention, (3) combined autonomy support and implementation intention, and (4) a control. Intervention components have been developed and written by the researchers, and will be automatically presented to participants as they progress through an online survey tool (Qualtrics). The one-time intervention will be of approximately 30-minute duration, depending on participants' progression through questions and content. All conditions will receive National Health and Medical Research Council guidelines on alcohol consumption to reduce the risk of harm. Participants receiving the autonomy support component will be asked to generate their own reasons for pursuing reduced pre-drinking alcohol consumption that are consistent with their needs and perceived as beneficial. Participants receiving the implementation intention component will formulate their own if-then plans to be enacted in certain pre-drinking contexts, to help attain the goal of reduced pre-drinking alcohol consumption. Participants in the combined condition will receive the autonomy support component to facilitate autonomous motivation to reduce pre-drinking alcohol consumption, then the implementation intention component to help translate this motivation into action by generating if-then statements to be enacted in response to certain contextual cues. Participants' responses to the intervention components (i.e., prompts) will be content analyzed for monitoring adherence to the intervention. Participants will be emailed their respective intervention components following the completion of the intervention, and will complete a brief follow-up, four weeks later, to ascertain the effects of the intervention on reducing pre-drinking alcohol consumption and alcohol-related harm. Participants will be send a weekly text message (SMS) reflecting the content they received in the intervention (e.g., participants in the implementation intention condition will receive an SMS each week reminding them of their if-then plans to reduce pre-drinking alchol consumption).

Sponsors

Professor Martin Hagger
Lead SponsorIndividual

Study design

Allocation
Randomised controlled trial
Intervention model
Factorial
Primary purpose
Prevention
Masking
Blinded (masking used) (Subject, Caregiver)

Eligibility

Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

Current university undergraduate 'pre-drinkers' (i.e., those who report pre-drinking within the previous 12 months). Pre-drinking will be defined consistent with previous uses throughout empirical studies, as follows: "The practice of consuming alcohol prior to attending a subsequent social event, where alcohol consumption often continues."

Exclusion criteria

Non-drinkers

Outcome results

None listed

Source: ANZCTR · Data processed: Mar 14, 2026