As to and the nature and quality of the recall and – by implication
– learning, the R/K test showed no effects of both screen luminance
and ambient illuminance. Nevertheless, a larger employ of
episodic memory (reflected by a larger number of R frequencies,
as opposed to K ones) was observed when reading from EVD. This
result is in line with Garland and Noyes (2004), who suggested that
the cognitive processing taking place when learning from EVDs and
paper is different. According to these authors the characteristics of
the computer screen (refresh rate, high levels of contrast and fluctuating
luminance) might interfere with cognitive processing for
long-term memory.