Table 1.

Hypothetical data for two single-item Likert instruments (n = 10)

Scale A			Scale B
Score i	Frequency fi	$f_i^2$	Score i	Frequency fi	$f_i^2$
1	1	1	1	8	64
2	2	4	2	0	0
3	4	16	3	1	1
4	2	4	4	0	0
5	1	1	5	1	1
Sum		26			66