UNITED WE LEARN: POSITIVE RELATIONSHIPS AND RESPONSIBLE DECISIONS
RESOURCE BOOKLET
EFFECT SIZE FACTORS Effect Size
Impact
Example *Effect Size Factors
0.00 or less =
Negative effect
Students feeling disliked -.34 Retention -.32
0.00 — 0.20
=
Negligible, unclear effects
Teacher subject-matter knowledge +.09 Background music +.10
0.20 — 0.40
=
Small-moderate effects
Class size +.21 Homework +.29
0.40 — 0.60
=
Strong effects
Teacher-Student Relationships +.52 Positive Peer Influences +.53
0.60 — 2.00
=
Extreme positive effects
Feedback +.70 Summarization +.79
*Effect sizes vary in different studies Source: John Hattie, Visible Learning Plus 250+ Influences on Student Achievement
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Resource Booklet — United We Learn: Positive Relationships and Responsible Decisions
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