Table 2.

Descriptive statistics, internal consistence and pairwise comparison of all variables for inter-group analysis

Variables	Scale	Test time	α	Exp. group (n = 16)		Cont. group (n = 18)		T. error	p	Diff. 95% CI	F(1, 32)	ηp2	π
				M	SD	M	SD			ILL. U.L.]
Autonomy	1-5	Pre	.70	2.16	.66	2.33	.80	.25	.489	[-.34 .69]	.49	.02	.13
		Post	.76	3.33	.75	2.44	.83	.27	.003	[-1.44 -.33]	10.50	.25	.98
Competence	1-5	Pre	.85	2.86	1.04	3.17	.95	.34	.362	[-.38 1.01]	.86	.03	.20
		Post	.88	3.84	.60	3.29	.58	.20	.010	[-.97 -.14]	7.46	.19	.99
Relatedness	1-5	Pre	.94	3.91	.54	3.93	1.00	.28	.932	[-.55 .60]	.01	.00	.95
		Post	.93	4.11	.66	4.19	.98	.29	.772	[-.51 .68]	.09	.00	.06
Autonomous motivation	1-7	Pre	.97	5.01	.92	5.31	1.34	.40	.457	[-.51 1.12]	.568	.02	.21
		Post	.94	6.29	.65	5.58	.71	.24	.005	[-1.19 -.23]	9.15	.22	.95
Controlled motivation	1-7	Pre	.73	1.73	.75	2.12	1.18	.33	.239	[-.28 1.07]	1.44	.04	.68
		Post	.81	3.51	.61	3.54	.75	.24	.899	[-.45 .51]	.02	.00	.06
Amotivation	1-7	Pre	.71	1.98	.68	2.01	1.18	.34	.931	[-.66 .71]	.01	.00	.06
		Post	.81	1.41	.91	1.75	.87	.31	.269	[-.28 .97]	1.26	.04	.39
Procedural knowledge	0-100	Pre	.71	54.68	11.37	50.46	7.55	3.28	.206	[-10.90 .2.45]	1.66	.05	1.00
		Post	.70	68.49	6.80	52.77	15.66	4.23	.001	[-24.34 -.7.11]	13.77	.30	1.00
Perceived performance	1-10	Pre	-	4.90	1.14	4.96	1.57	.48	.896	[-.91 1.03]	.02	.00	.06
		Post	-	6.03	1.36	5.2	.76	.37	.019	[-1.67 -.16]	6.06	.16	.99
Future commitment	1-5	Pre	.71	3.72	.82	4.14	.59	0.24	.092	[-.07 .91]	3.01	.09	.43
		Post	.71	4.31	.44	3.53	.85	0.24	.002	[-1.27 -.30]	11.00	.26	.99

M = mean; SD = standard deviation; α = Cronbach’s alpha;

“-” = reliability values of the players’ perceived performance are not presented as this was obtained through one single item. Significance level established at .05