Table 3. Internal consistency coefficients in pilot studies 1, 2 and final study.

Subscale	Number of items	Cronbach’s alpha
		Spanish versionN = 168, 61*, 613†	French versionN = 80, 53*, 377†	German versionN = 72, 49*, 375†
Attitude toward PA	15	.571, .927*, .907†	.596, .901*, .908†	.525, .911* .903†
Perceived parental socialization	14	.763, .912*, .925†	.702, .899*, .933†	.711, .903*, .918†
Perceived physical competence	8	.747, .956*, .944†	.696, .939*, .948†	.682, .942*, .953†
Perceived resources support	6	.596, .778*, .752†	.472, .723*, .726†	.493, .696*, .691†
OVERALL	43	.765, .948*, .940†	.716, .936*, .953†	.702, .927*, .937†

Note. * Participants and Cronbach’s alpha for pilot study 2. †  Participants and Cronbach’s alpha for final study.