No question among the sixty had zero difficulty; the easiest averaged 7.83, 7.62, and 7.23¶

Claim · All claims
Evidence · 1 study · design r2 · q2
Currency · newest study 1922 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Inspection of average grades from 933 subjects showed no universally correct response to any of the sixty questions; the nearest approaches were Nos. II7, II8, and III1 with averages 7.83, 7.62, and 7.23. → Sackett 1922

Evidence¶

Sackett 1922¶

Sackett, L. W. (1922). A Scale in Ancient History. The Journal of Educational Psychology. https://psycnet.apa.org/journals/edu

q2 · i? · design · r2

Descriptive finding from the article's zero-point section, based on inspection of average grades of the 933 subjects. The article reports "no question had zero difficulty" and names the three easiest questions with their printed averages of 7.83, 7.62, and 7.23.

"An inspection of the rough average grades of 933 subjects on each of the sixty questions shows that to no one was there a universally correct response; i. e., no question had zero difficulty. The nearest approach was Nos. II7, Us, and Hi with averages 7.83, 7.62, and 7.23, respectively."

Discussion¶

Related Claims¶

• A 933-pupil survey of ancient-history recall provided the data for scaling question difficulty — related
• Question E was answered by all 27 high-school pupils, establishing a zero-difficulty reference 2.191 units below the median — related