Counting screen-watching persons in infrared records provides a measure presumably related to the effectiveness of a film sequence¶

Claim · All claims
Evidence · 1 study · design r1 · q1
Currency · newest study 1955 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q1 i? By counting the number of persons watching the screen, one obtains a measure presumably related to the effectiveness of that sequence. → Greenhill 1955

Evidence¶

Greenhill 1955¶

Greenhill, L. P. (1955). The Recording of Audience Reactions by Infra-Red Photography. Technical Report SDC 269-7-56, Instructional Film Research Program, Pennsylvania State University, for the Special Devices Center, Office of Naval Research. https://eric.ed.gov/?q=The+Recording+of+Audience+Reactions+by+Infra-Red+Photography

q1 · i? · design · r1

The report's stated rationale (type e, purpose section): attention counts from infrared photographs are offered as a proxy measure of sequence effectiveness. The article hedges with "presumably" and prints no validation data for the proxy in this excerpt.

"By counting the number of persons watching the screen it is possible to obtain a measure presumably related to the effec*.iveness of that seqaence."

Discussion¶

Related Claims¶

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• In the Utah Physics Film Project, filmed and regular physics instruction showed no differences in large and small schools, but medium-sized schools favored regular instruction — related