Table 4

Initial solution of the nonparametric tests in Dimension 2 following criteria for item elimination.

Items	Mean	Standard Deviation	Item-total correlation corrected	Cronbach’s alpha if the element is removed	Skewness (ET=0.119)	Kurtosis (ET=0.238)	Eliminate
q13	2.29	0.917	.154	.630	0.065	–0.418	1
q12	2.28	0.938	.219	.617	–0.327	0.076	2
q13	2.12	0.915	.497	.559	0.569	–0.408
q14F	2.02	1.286	.330	.593	–0.770	–1.211
q14F	1.04	0.314	.184	.627	2.375	14.966	3
q18	1.80	0.879	.182	.624	0.841	–0.063	4
q18	3.28	0.778	.171	.625	–0.876	0.371	5
q17	2.81	0.954	.622	.527	–0.435	–0.574
q18	7.36	2.039	.535	.536	–1.008	1.220
Reliability statistics
Cronbach’s alpha .626			Cronbach’s alpha based on typed items .620			No. of elements 9
Analysis of the Final Proposal as items of Dimension 2 – Perceived Competence to teach Body Expression in secondary schools
Items	Average of the scale if the element is eliminated		Variance of the scale if the element is eliminated		Item-total correlation corrected	Squared multiple correlation	Cronbach’s alpha if the element is removed
q13	12.19		11.041		.566	.472	.587
q14M	12.29		10.466		.384	.418	.654
q18	11.50		10.673		.599	.470	.566
q18	6.95		6.015		.514	.482	.652
Reliability statistics
Cronbach’s alpha .675			Cronbach’s alpha based on typed items .734			No. of elements 4
Note: q: question, numbers 13-18: question identifier number. As criteria for the elimination of items, homogeneous means, standard deviation far from zero, item-total correlation greater than .30, skewness less than 2 and kurtosis less than 7 were considered as criteria for the elimination of items.