Table 2. Results for the difference test with pro-vitamin A rich and white cassava.

Difference test	Caretakers (n = 30)	Children (n = 30)
Participant variability (y)	0.17*	0.00
Appropriate model	Beta-binomial	Binomial
Max. no. of correct responses	180	180
No. of correct responses needed for significance	75	71
No. of correct responses observed	130**	89**
Discrimination µ Test: µ0 = 1/3	0.72	0.49

^* =  significant (α = 0.05) using Tarone's Z statistic.

^** =  significant (α = 0.05).