Metacognition, motivation, and affect are components of self-regulated learning (SRL) that interact. The "metacognitive and affective model of self-regulated learning" (the MASRL model) distinguishes two levels of functioning in SRL, namely, the Person level and the Task x Person level. At the Person level interactions between trait-like characteristics such as cognitive ability, metacognitive knowledge and skills, self-concept, perceptions of control, attitudes, emotions, and motivation in the form of expectancy-value beliefs and achievement goal orientations are hypothesized. These person characteristics guide top-down self-regulation. At the Task x Person level, that is, the level at which SRL events take place, metacognitive experiences, such as feeling of difficulty, and online affective states play a major role in task motivation and bottom-up self-regulation. Reciprocal relations between the two levels of functioning in SRL are also posited. The implications of the MASRL model for research and theory are discussed. (Contains 3 footnotes and 1 figure.)