The randomized controlled trial Fast Track multilevel intervention for children with early-emerging conduct problems breaks intergenerational transmission of violence across three generations

ERCT Criteria Breakdown

• Level 1 Criteria

  • C

    Class-level RCT

    • Randomization occurred at the school level, which meets or exceeds class-level randomization.
    • "Within each site, the schools were divided into one to three paired sets of schools, and one set in each pair was randomly assigned to intervention and control conditions."
    • Relevant Quotes: 1) "High-risk elementary schools (n = 53) were selected for Fast Track participation based on neighborhood crime and poverty rates in Durham, NC; Nashville, TN; rural Pennsylvania; and Seattle, WA." (p. 2) 2) "Within each site, the schools were divided into one to three paired sets of schools, and one set in each pair was randomly assigned to intervention and control conditions." (p. 2) 3) "children considered at high risk for aggressive behavior based on teachers’ and parents’ screen scores were assigned to either a 10-year intervention or a control group based on their school." (p. 1) Detailed Analysis: Criterion C requires an RCT with randomization at the class level, or a stronger unit (such as the school), to reduce contamination between treatment and control students. The paper explicitly states that schools (in paired sets) were randomly assigned to intervention versus control conditions, and that children were assigned "based on their school." This is school-level cluster randomization, which is stronger than class-level randomization for preventing spillovers. Final summary sentence: Criterion C is met because schools were randomly assigned to conditions, which exceeds the class-level requirement.
  • E

    Exam-based Assessment

    • The outcomes are violence and mental-health measures (e.g., SDQ), not standardized academic exams.
    • "When individuals from G2 were age 34, children from G3’s mental health was measured by parents from G2 report with the Strengths and Difficulties Questionnaire (SDQ; Goodman, Lamping, & Ploubidis, 2010; Goodman, 2001), a 25-item normed measure designed to capture children’s mental health difficulties."
    • Relevant Quotes: 1) "Primary outcome: children with G3’s mental health problems. When individuals from G2 were age 34, children from G3’s mental health was measured by parents from G2 report with the Strengths and Difficulties Questionnaire (SDQ; Goodman, Lamping, & Ploubidis, 2010; Goodman, 2001), a 25-item normed measure designed to capture children’s mental health difficulties." (p. 3) 2) "Predictors: individuals from G1’s intimate partner violence and parent to child violence." (p. 3) 3) "This study derived measures of individuals from G1’s IPV and PCV, and individuals from G2’s PCV, from two subscales of the Conflict Tactics Scale (Straus, 1979)." (p. 3) Detailed Analysis: Criterion E requires standardized, exam-based assessments of educational outcomes (e.g., state or national achievement exams). This paper’s primary outcome is children’s mental health difficulties (SDQ), and key predictors/mediators are violence measures (IPV/PCV) derived from the Conflict Tactics Scale. These are standardized instruments in psychology, but they are not academic achievement exams and do not constitute exam-based educational assessment. Final summary sentence: Criterion E is not met because the study uses SDQ and violence measures rather than standardized academic exams.
  • T

    Term Duration

    • The intervention and follow-up span far longer than an academic term (multiple grades plus adult follow-up at age 34).
    • "Intervention components were delivered to the first two generations (i.e., G1 parents and G2 children) from 1st through 10th Grade, with first sessions beginning in October of Grade 1."
    • Relevant Quotes: 1) "children considered at high risk for aggressive behavior based on teachers’ and parents’ screen scores were assigned to either a 10-year intervention or a control group based on their school." (p. 1) 2) "Intervention components were delivered to the first two generations (i.e., G1 parents and G2 children) from 1st through 10th Grade, with first sessions beginning in October of Grade 1." (p. 3) 3) "In 2020–2021, when the original children from G2 were adults and age 34, 374 participants from G2 (92% of eligible G2s; n = 191 intervention group, n = 183 control group) were invited to complete a survey that assessed their relationship with their romantic partner (if they had one), and their parenting of their children from G3." (p. 2) Detailed Analysis: Criterion T requires that outcomes be measured at least one academic term after the intervention begins. The paper describes a long-running intervention beginning in Grade 1 (October of Grade 1) and continuing through Grade 10, plus an adult follow-up survey at age 34 (2020–2021). These intervals greatly exceed a single term. Final summary sentence: Criterion T is met because the study tracks participants for many years after the intervention begins.
  • D

    Documented Control Group

    • The control group is clearly described, including its size and that it received no intervention while being followed over time.
    • "The families in the control group were followed over time, completed all questionnaires, but did not receive any intervention (therefore, they were free to seek other services if needed)."
    • Relevant Quotes: 1) "yielding a sample of 891 children from G2 (intervention group, N = 445; control group, N = 446; see Figure 1 CONSORT Diagram and CPPRG, 2020 for further details)." (p. 2) 2) "The families in the control group were followed over time, completed all questionnaires, but did not receive any intervention (therefore, they were free to seek other services if needed)." (p. 3) 3) "The parents from G2 subsample and the initial sample from G2, and the parents from G2 intervention and control samples only differed on a combined 8 of 58 tests of pre-treatment and demographic differences between groups (see Table S1)." (p. 5) Detailed Analysis: Criterion D requires clear documentation of the control group, including what it received and enough baseline/descriptive information to support comparisons. The paper provides the original control group size (N = 446), states that control families were followed and completed study measures, and explicitly states they "did not receive any intervention." It also references baseline/demographic comparisons (Table S1) and a CONSORT flow chart. Final summary sentence: Criterion D is met because the control group’s condition, size, and baseline comparison information are documented.

• Level 2 Criteria

  • S

    School-level RCT

    • Schools (paired sets of schools) were randomized to intervention versus control, satisfying school-level randomization.
    • "Within each site, the schools were divided into one to three paired sets of schools, and one set in each pair was randomly assigned to intervention and control conditions."
    • Relevant Quotes: 1) "High-risk elementary schools (n = 53) were selected for Fast Track participation based on neighborhood crime and poverty rates in Durham, NC; Nashville, TN; rural Pennsylvania; and Seattle, WA." (p. 2) 2) "Within each site, the schools were divided into one to three paired sets of schools, and one set in each pair was randomly assigned to intervention and control conditions." (p. 2) 3) "children considered at high risk for aggressive behavior based on teachers’ and parents’ screen scores were assigned to either a 10-year intervention or a control group based on their school." (p. 1) Detailed Analysis: Criterion S requires randomization at the school (or equivalent institution/site) level. The paper explicitly states that schools were paired within each site and that one school set per pair was randomly assigned to intervention while the other was assigned to control. This is school-level cluster assignment. Final summary sentence: Criterion S is met because the unit of randomization is the school.
  • I

    Independent Conduct

    • The paper discloses that key investigators are developers of the program/curricula, without clear documentation of an independent evaluation lead.
    • "K.L.B., J.D.C., K.A.D., M.T.G., J.E.L., and R.J.M. are the developers of the Fast Track curriculum and have a publishing and royalty agreement with Guilford Publications, Inc."
    • Relevant Quotes: 1) "K.L.B., J.D.C., K.A.D., M.T.G., J.E.L., R.J.M., and E.E.P. are the Principal Investigators on the Fast Track Project and have a publishing agreement with Guilford Publications, Inc." (p. 12) 2) "K.L.B., J.D.C., K.A.D., M.T.G., J.E.L., and R.J.M. are the developers of the Fast Track curriculum and have a publishing and royalty agreement with Guilford Publications, Inc." (p. 12) Detailed Analysis: Criterion I requires that the evaluation be conducted independently from the intervention designers (or that the paper clearly documents third-party oversight separating the intervention developers from data collection and analysis). The disclosure section explicitly identifies principal investigators who are also developers of the Fast Track curriculum. The paper does not provide a clear statement that an external evaluation team (independent of the developers) led the study’s implementation, data collection, and analysis. Final summary sentence: Criterion I is not met because the paper identifies key investigators as program developers without clearly documenting independent evaluation conduct.
  • Y

    Year Duration

    • The intervention runs from Grade 1 through Grade 10 and includes long-term follow-up, far exceeding 75% of an academic year.
    • "Intervention components were delivered to the first two generations (i.e., G1 parents and G2 children) from 1st through 10th Grade, with first sessions beginning in October of Grade 1."
    • Relevant Quotes: 1) "children considered at high risk for aggressive behavior based on teachers’ and parents’ screen scores were assigned to either a 10-year intervention or a control group based on their school." (p. 1) 2) "Intervention components were delivered to the first two generations (i.e., G1 parents and G2 children) from 1st through 10th Grade, with first sessions beginning in October of Grade 1." (p. 3) 3) "In 2020–2021, when the original children from G2 were adults and age 34..." (p. 2) Detailed Analysis: Criterion Y requires outcome measurement at least 75% of an academic year after the intervention begins. The paper describes an intervention that begins in Grade 1 and continues through Grade 10, with additional follow-up into adulthood (age 34). This is far longer than the minimum year threshold. Final summary sentence: Criterion Y is met because the study spans multiple school years after intervention onset.
  • B

    Balanced Control Group

    • The intervention adds substantial time and resources, and these added inputs are integral to the Fast Track treatment package being tested against a no-intervention control.
    • "During elementary school, all families in the intervention group were offered parent training with home visiting, academic tutoring, and social skills."
    • Relevant Quotes: 1) "During elementary school, all families in the intervention group were offered parent training with home visiting, academic tutoring, and social skills." (p. 3) 2) "In particular, 2-h parent and child group interventions involving parents from G1 and children from G2 were conducted at the school building on Saturdays or weekday evenings..." (p. 3) 3) "Furthermore, a teacher-implemented, universal social–emotional learning curriculum (Kusche & Greenberg, 2020) was provided to children from G2 for an average of 2 to 3 lessons per week at all sites through Grade 5..." (p. 3) 4) "The families in the control group were followed over time, completed all questionnaires, but did not receive any intervention (therefore, they were free to seek other services if needed)." (p. 3) Detailed Analysis: Criterion B compares the nature, quantity, and quality of resources (time, staffing, materials, added instruction) between intervention and control conditions, unless the additional resources are explicitly integral to the treatment being tested. The intervention clearly adds substantial resources beyond business-as-usual schooling (multi-hour parent/child sessions, home visiting, academic tutoring, social skills components, and classroom lessons multiple times per week). The control group received no Fast Track intervention. Here, the extra resources are not an incidental add-on; they are the defined Fast Track multicomponent package. The study’s core estimand is the net effect of assigning schools/families to this comprehensive package versus not receiving it. Under the ERCT Criterion B decision logic, this matches the "resources are treatment" branch (the resource-intensive package is the treatment), so imbalance does not automatically invalidate B. Final summary sentence: Criterion B is met because the extra time/resources are integral to the Fast Track treatment package being intentionally tested against no Fast Track intervention.

• Level 3 Criteria

  • R

    Reproduced

    • No peer-reviewed independent replication by a different research team in a different context was identified.
    • Relevant Quotes: 1) No relevant quotes about independent replication were found in the paper. (n/a) Detailed Analysis: Criterion R requires evidence that the intervention was independently replicated by a different research team in a different context and published in a peer-reviewed journal. This article reports analyses from the original Fast Track randomized trial cohort and cites multiple prior Fast Track publications, but it does not document an independently run replication trial by non-developer authors. Additional searching did not identify a distinct, peer-reviewed, independently led RCT replication of Fast Track with the same core multicomponent model. Final summary sentence: Criterion R is not met because evidence of an independent peer-reviewed replication trial was not found.
  • A

    All-subject Exams

    • Because standardized educational exams are not used (criterion E is not met), all-subject standardized exam coverage is also not met.
    • Relevant Quotes: 1) "When individuals from G2 were age 34, children from G3’s mental health was measured by parents from G2 report with the Strengths and Difficulties Questionnaire (SDQ; Goodman, Lamping, & Ploubidis, 2010; Goodman, 2001)..." (p. 3) Detailed Analysis: Criterion A requires standardized exam-based assessment across all main subjects and, per the ERCT specification, cannot be met if criterion E is not met. This paper does not use standardized academic exams for outcomes (it uses SDQ and violence measures). Therefore, it cannot provide all-subject standardized exam coverage. Final summary sentence: Criterion A is not met because the study does not use standardized educational exams at all.
  • G

    Graduation Tracking

    • The Fast Track cohort is tracked through Grade 12 and into adulthood, which exceeds the graduation horizon.
    • "Time Frame: Grades 1-12"
    • Relevant Quotes: 1) "In 2020–2021, when the original children from G2 were adults and age 34, 374 participants from G2 (92% of eligible G2s; n = 191 intervention group, n = 183 control group) were invited to complete a survey..." (p. 2) 2) "Time Frame: Grades 1-12" (ClinicalTrials.gov record for NCT01653535, accessed via ICH GCP mirror) Detailed Analysis: Criterion G requires tracking participants until graduation. The paper itself reports adult follow-up at age 34, which implies long-term tracking far beyond typical K-12 graduation age. In addition, the trial registry record for Fast Track explicitly indicates outcome measurement time frames that include "Grades 1-12," which corresponds to tracking through the end of high school. Final summary sentence: Criterion G is met because the cohort is tracked through Grade 12 (graduation) and followed into adulthood.
  • P

    Pre-Registered

    • The Fast Track study began in 1991, but the trial record was first submitted in 2012, so it was not pre-registered.
    • "First Submitted July 16, 2012"
    • Relevant Quotes: 1) "The Fast Track intervention, launched in the early 1990s..." (p. 1) 2) "Starting from 1992, parents from G1 ... reported on their parenting practices and intimate partner violence behaviors..." (p. 2) 3) "Study Start March 1, 1991" (ClinicalTrials.gov record for NCT01653535, accessed via ICH GCP mirror) 4) "First Submitted July 16, 2012" (ClinicalTrials.gov record for NCT01653535, accessed via ICH GCP mirror) Detailed Analysis: Criterion P requires that the study protocol be registered prior to the start of data collection / study start. The paper describes Fast Track as launched in the early 1990s and reports data collection beginning in the early 1990s. The trial registry record indicates the study started on March 1, 1991, while the record was first submitted on July 16, 2012. Because registration occurred long after the study started, it does not qualify as pre-registration. Final summary sentence: Criterion P is not met because the trial was first submitted to the registry in 2012, well after the 1991 study start.