Table 2.

Examples of types of metacognitive knowledge.

Types of knowledge (Flavell et al., 2002)	Data collected in the case study
Declarative: individuals’ knowledge about what they know and the strategies and personal resources they have at their disposal.	The mobilization of declarative metacognitive knowledge was verified in processes related to auditory-musical perception and social and musical interactions between musicians and also in the choice of repertoire: e.g.“(...) choosing [the repertoire] involves appreciating the pieces, and when I hear something... I imagine the sound of the horn player, on the trumpet the sound of the trumpeter... and then I think about the sound” (Euphonist, interview 2).
Procedural: awareness of how to perform a given task and which strategies and resources should be used	Procedural knowledge was verified especially during the participants’ reports on knowledge and strategies explored in solving problems during the construction of the performance: e.g. “In the sentence they do in measure 22, we could breathe there” (Trumpet player 1, rehearsal n.2)
Conditional: notion of when, where and for what reasons to use certain learning strategies	Data relating to conditional knowledge were identified in the dialogs during the practice sessions. Musicians reveal an understanding of technical and interpretative difficulties, cognitive demands (e.g. memorization) and physical effort requirements. “In the phrase (…) in measure 22, we could breathe there” (Trumpet player 1, rehearsal n.2)