Training and Assessing Model for the Ability of Community Health Volunteers in Anthropometric Measurement Using the Rasch Stacking and Racking Analyses

Table 1

Psychometric attribute of the instrument (N = 41).

Psychometric attribute	Pretest	Posttest
Raw variance explained by measures	51.5	49.9
Unexplained variance	<15%	<15%
Cronbach’s alpha	0.65	0.79
Person reliability	0.63	0.67
Person separation	1.3	1.42
Item reliability	0.95	0.82
Item separation	4.3	2.17