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Group Design

Group Design

The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between the two are due to...

Experimental Designs

Experimental Designs

An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...

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Related Experiment Video

Updated: May 14, 2026

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers

Published on: January 5, 2018

A randomized trial evaluating a parent based intervention to reduce college drinking.

Diana M Doumas¹, Rob Turrisi, Anne E Ray

¹Department of Counselor Education, Institute for the Study of Addiction, Boise State University, Boise, ID 83725-1721, USA. dianadoumas@boisestate.edu

Journal of Substance Abuse Treatment

|February 2, 2013

Summary

Parent-based interventions (PBI) effectively reduce college student drinking. Adding booster brochures to PBIs further enhanced reductions in intoxication and peak drinking, showing greater effectiveness.

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The Motivation for Alcohol Reward: Predictors of Progressive-Ratio Intravenous Alcohol Self-Administration in Humans

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Published on: April 28, 2022

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Last Updated: May 14, 2026

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers

Published on: January 5, 2018

The Motivation for Alcohol Reward: Predictors of Progressive-Ratio Intravenous Alcohol Self-Administration in Humans

The Motivation for Alcohol Reward: Predictors of Progressive-Ratio Intravenous Alcohol Self-Administration in Humans

Published on: April 28, 2022

Area of Science:

Public Health
Psychology
Substance Abuse Research

Background:

College student drinking poses significant public health risks.
Parent-based interventions (PBI) show promise in mitigating harmful alcohol consumption among young adults.

Purpose of the Study:

To evaluate the efficacy of a parent-based intervention (PBI) in reducing alcohol consumption among first-year college students.
To determine if supplementary booster brochures enhance the effectiveness of PBIs.

Main Methods:

A randomized controlled trial involving 443 first-year college students.
Three conditions: PBI, PBI plus booster brochures (PBI-B), and an assessment-only control group (CNT).
Data collected at a 4-month post-intervention follow-up.

Main Results:

The PBI-B group reported significantly lower levels of drinking to intoxication compared to PBI and CNT groups.
Peak alcohol consumption was also significantly reduced in the PBI-B group relative to PBI and CNT groups.
No significant differences in drinking were observed between the PBI group and the CNT group.

Conclusions:

Parent-based interventions are effective in reducing college student drinking.
Booster brochures significantly enhance the effectiveness of PBIs for reducing alcohol consumption and intoxication in college students.