Interleaved practice

Overview

Influence: Interleaved practice
Domain: Student Learning Strategies
Sub-Domain: Learning strategies
Potential to Accelerate Student Achievement: Potential to accelerate
Influence Definition: Interleaving involves implementing a schedule of practice that mixes different kinds of problems, or a schedule of study that mixes different kinds of material, within a single study session. It can also involve mixing, or interleaving, multiple subjects of topics, as opposed to blocked practice, which typically involves studying one topic very thoroughly before moving to another topic

Evidence

Number of meta-analyses: 2
Number of studies: 163
Number of students: 9,438
Number of effects: 342
Effect size: 0.44

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
Nature: Science of Learning	Donoghue & Hattie	Australia	Learning strategies: A synthesis and conceptual model	2018	Interleaved practice	104	972	104	0.47
Psychological Bulletin	Brunmair & Richter	Germany	Similarity matters: A meta-analysis of interleaved learning and its moderators	2019	Interleaved practice	59	8,466	238	0.42
TOTAL/AVERAGE						163	9,438	342	0.44

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	2	3	2	3	3