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Infrared time-lapse photography for unobtrusive audience-reaction observation

Research Method · All research methods
Evidence · 1 claim (1 for) · 1 study (1 design), q1 · 0 of 1 report an effect size · 1 claim rests on one study

Description

The report developed a practical means of recording audience reactions in a darkened room using infrared photographs, so that reactions can be related to film content. The technique "made use of high speed infrared film, time lapse photography on 16 mm films at one frame a second, infrared reflector heat lamps with ruby glass, mirror reflection of the picture on the screen for synchronization purposes, and a special projector for analyzing the scenes." Counting persons watching the screen yields a measure presumably related to a sequence's effectiveness, replacing time-consuming test administration.

Accounts

  • Infrared time-lapse photography apparatus for recording audience reactions to film: The report developed a practical means of recording audience reactions in a darkened room using infrared photographs, so that reactions can be related to film content. The technique "made use of high speed infrared film, time lapse photography on 16 mm films at one frame a second, infrared reflector heat lamps with ruby glass, mirror reflection of the picture on the screen for synchronization purposes, and a special projector for analyzing the scenes." Counting persons watching the screen yields a measure presumably related to a sequence's effectiveness, replacing time-consuming test administration. (Greenhill (1955))

Claims

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Key Sources

  • 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
Page metadata
Field Value
type research-method
id infrared-time-lapse-photography-for-unobtrusive-audience-reaction-observation
title Infrared time-lapse photography for unobtrusive audience-reaction observation
description The report developed a practical means of recording audience reactions in a darkened room using infrared photographs, so that reactions can be related to film content.
status review
generated by process:settle-candidates on 2026-10-29
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