Characteristics of mastery motivation and its relationship with parenting stress in toddlers with language delay.

Mastery motivation is a multifaceted, psychological force that stimulates a child to master skills or tasks and is positively associated with language-related competences. Children with developmental delay might have lower levels of motivation, and their parents might face escalated parenting stress as well. The aims of this study were to identify the characteristics of mastery motivation in toddlers with language delay by intergroup and intragroup comparison, and to investigate the associations between specific components of parenting stress and toddler's mastery motivation.