Keywords: one-way analysis of variance
An individual's critical flicker frequency is the highest frequency at which the flicker in a flickering light source can be detected. At frequencies above the critical frequency, the light source appears to be continuous even though it is actually flickering. This investigation recorded critical flicker frequency and iris colour of the eye for 19 subjects.
|Colour||Eye colour: Brown, Green or Blue|
|Flicker||Critical flicker frequency in cycles/sec|
Data File (tab-delimited text)
|The effect of iris color on critical flicker frequency. Journal of General Psychology (1973), 91-95.|
|Devore and Peck, Page 566.|
I use this data as an example of post-hoc comparisons, because there is no obvious prior hypothesis relating eye colour to flicker frequency.