Q

What did the 2005 meta-analysis reveal about expectancy effects?

From 5 years of verified research · Vassili Sandqvist
A

The 2005 meta-analysis published in Psychological Bulletin analyzed 479 studies and found that expectancy effects on academic performance had a significant impact, with an average effect size of d=0.41. This suggests that the influence of expectations could equate to a change of approximately one grade letter, particularly strong in early educational settings and ambiguous performance scenarios.

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