Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

One-Way ANOVA: Equal Sample Sizes01:15

One-Way ANOVA: Equal Sample Sizes

One-Way ANOVA can be performed on three or more samples with equal or unequal sample sizes. When one-way ANOVA is performed on two datasets with samples of equal sizes, it can be easily observed that the computed F statistic is highly sensitive to the sample mean.
Different sample means can result in different values for the variance estimate: variance between samples. This is because the variance between samples is calculated as the product of the sample size and the variance between the...
Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...
Statistical Significance01:37

Statistical Significance

Once data is collected from both the experimental and the control groups, a statistical analysis is conducted to find out if there are meaningful differences between the two groups. A statistical analysis determines how likely any difference found is due to chance (and thus not meaningful). In psychology, group differences are considered meaningful, or significant, if the odds that these differences occurred by chance alone are 5 percent or less. Stated another way, if we repeated this...
Bias in Epidemiological Studies01:29

Bias in Epidemiological Studies

Biases can arise at various stages of research, from study design and data collection to analysis and interpretation. Recognizing and addressing these biases is essential to ensure the validity and reliability of epidemiological findings.Broadly speaking, biases in epidemiology fall into three main categories: selection bias, information bias, and confounding. A more detailed description of possible biases is:
Group Design02:01

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...
Cause and Effect01:53

Cause and Effect

While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Assessing Personal and Family Strengths Among Active-Duty Military Members to Predict Self-Directed Harm and Interpersonal Violence.

Journal of interpersonal violence·2025
Same author

Resiliency among United States Air Force personnel: The direct and interactive influence of cognitive fitness and confidence in social connections.

Military psychology : the official journal of the Division of Military Psychology, American Psychological Association·2024
Same author

Connecting experiences of community shared responsibility and collective competence to the well-being of adults in military families.

Journal of community psychology·2020
Same author

Racial/ethnic measurement invariance of the School Success Profile (SSP)'s future orientation scale.

Journal of school psychology·2018
Same author

Assessment of adolescent optimism: Measurement invariance across gender and race/ethnicity.

Journal of adolescence·2018
Same author

Measuring dimensions of intergenerational contact: factor analysis of the Queen's University Scale.

Aging & mental health·2017

Related Experiment Video

Updated: May 30, 2026

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

Published on: September 11, 2021

Low effect sizes of evidence-based programs in school settings.

Joelle D Powers1, Natasha K Bowen, Kristina C Webber

  • 1School of Social Work, The University of North Carolina at Chapel Hill, USA. jdpowers@email.unc.edu

Journal of Evidence-Based Social Work
|August 11, 2011
PubMed
Summary
This summary is machine-generated.

Evidence-based programs in schools are expected to be effective, but a review found most lack significant effect sizes. This study examines the feasibility of implementing effective interventions in schools.

Related Experiment Videos

Last Updated: May 30, 2026

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

Published on: September 11, 2021

Area of Science:

  • Educational Psychology
  • Intervention Science
  • School Psychology

Background:

  • School practitioners aim to use effective interventions based on evidence.
  • Implementing evidence-based practices requires critical effect size information for decision-making.

Purpose of the Study:

  • To explore the feasibility of implementing effective school-based interventions.
  • To assess the availability and impact of effect size data for these programs.

Main Methods:

  • Reviewed effect sizes for 51 school-based programs.
  • Analyzed the effectiveness data of programs endorsed by authoritative sources.

Main Results:

  • The reviewed programs were not highly effective on average.
  • Difficulties were encountered in finding effect size information and programs with substantial effects.

Conclusions:

  • The widespread implementation of highly effective evidence-based programs in schools faces challenges.
  • Suggestions are provided to enhance the feasibility of evidence-based programs in educational settings.