High room illumination is detrimental to learning from rear-projected film, mainly when learners sit at extreme angles to or distances from the screen¶

Claim · All claims
Evidence · 1 study · causal r? · q2
Currency · newest study 1954 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? A high level of room illumination was detrimental to efficient learning, thought to hold mainly with many learners seated at extreme angles to, or distance from, the screen. → Research Abstracts 1954

Evidence¶

Research Abstracts 1954¶

Research Abstracts. (1954). https://eric.ed.gov/?q=instructional+film+research+program

q2 · i? · causal · r?

Two conditions of light were compared: daylight viewing and darkened room, with 1100 trainees tested on the assembly task. The authors themselves qualify the finding's scope to extreme seating angles and distances.

"Although the experiment indicated that a high level of room illumination is detrimental to efficient learning, this was thought to be true only if a large number of learners are seated at extreme angles to, or distance from, the screen."

Discussion¶

Related Claims¶

• Ash and Jaspen studied the effects of viewing angle, screen distance, and room illumination on learning with a rear-projection daylight screen — possibly the same claim (merge candidate)
• When light is well distributed and diffuse with no extremes of surface brightness, the eye is practically independent of illumination intensity within ordinary lighting ranges — related
• Extremes of surface brightness in the field of vision are the most important causes of eye discomfort and loss of efficiency in contemporary lighting systems — related
• Counting screen-watching persons in infrared records provides a measure presumably related to the effectiveness of a film sequence — related