While most studies on the determinants of learning deal with either cognition or motivation, there is a growing awareness that both should be considered. Our purpose was to examine the relative roles of cognitive and motivational factors for the scholastic achievement and behaviour of disadvantaged children. Cognition was conceptualised in terms of the psychosemantic theory that assesses cognitive processes by characteristics of the individual's meaning assignment (Kreitler & Kreitler, 1987a). Motivation was conceptualised in terms of the cognitive orientation (CO) theory which assumes that cognitive contents guide behaviour (Kreitler & Kreitler, 1982). Participants were 57 third and fourth graders of both genders, recommended for a remedial summer programme. They were administered the Meaning Test assessing cognitive abilities; the CO Questionnaire of Motivation for Learning assessing the disposition to learn; and the Metropolitan Achievement Test and the IOWA tests assessing verbal, mathematical and working skills. Teachers completed the Teacher-Child Rating Scale assessing six scholastic behaviours. Regression analyses showed that all dependent variables were predicted by the cognitive and motivational variables, better by specific than global predictors. Cognitive variables contributed more to the predictions, especially of academic achievements, and more in the case of verbal than mathematical abilities. In girls, motivational factors played a larger role than cognitive factors, absolutely and relative to boys. Implications for promoting scholastic achievements are discussed.