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Version 1.1 – Updated August 2021

Single-sex schools

Overview

  • Influence: Single-sex schools
  • Domain: School
  • Sub-Domain: Types of schools
  • Potential to Accelerate Student Achievement: Likely to have a small positive impact
  • Influence Definition: Single-sex – that is, all-male or all-female schools – were common among nineteenth century elites and some members of the middle class. That century also witnessed the emergence of all women’s colleges—including the so-called Seven Sisters of Barnard, Bryn Mawr, Mount Holyoke, Smith, Wellesley, Vassar, and Radcliffe.

Evidence

  • Number of meta-analyses: 1
  • Number of studies: 184
  • Number of students: 1,600,000
  • Number of effects: 114
  • Effect size: 0.08

Meta-Analyses

Meta-Analyses
Journal Title Author First Author's Country Article Name Year Published Variable Number of Studies Number of Students Number of Effects Effect Size
Psychological Bulletin Pahlke, Hyde & Allison USA The effects of single-sex compared with coeducational schooling on students’ performance and attitudes: A meta-analysis 2014 Single vs. Coed Schools (on girls and boys) on achievement 184 1,600,000 114 0.08
TOTAL/AVERAGE 184 1,600,000 114 0.08

Confidence

The Confidence is the average of these four measures, each divided into five approximately equal groups and assigned a value from 1 to 5 based on the following criteria:

  • Number of Meta-analyses
    • 1 = 1
    • 2 = 2–3
    • 3 = 4–6
    • 4 = 7–9
    • 5 = 10+
  • Number of Studies
    • 1 = 1–10
    • 2 = 11–50
    • 3 = 51–200
    • 4 = 201–400
    • 5 = 400+
  • Number of Students
    • 1 = 1–2,500
    • 2 = 2,501–10,000
    • 3 = 10,000–20,000
    • 4 = 20,000–100,000
    • 5 = 100,001+
  • Number of Effects
    • 1 = 1–100
    • 2 = 101–300
    • 3 = 301–600
    • 4 = 601–1,200
    • 5 = 1,200+
Confidences
Number of Meta-Analyses Number of Studies Number of Students Number of Effects Overall Confidence
Confidence Factor 1 3 5 2 3
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