This study aimed to investigate the importance of self-efficacy and attitudes to wards writing in writing training. It was also necessary to establish whether these constructs could be more enhanced through a specific intervention as part of the motivational factors, than through training which coaches other writing components such as cognitive processes or cognitive style. To achieve this, the first training program, focusing on the strategies for planning writing, was applied to 28 5th and 6th graders with learning disabilities (LD); a second program, focusing on writing strategies plus reflexive processes, was applied to 49 learning disabled students studying the same grades as in the first group. Finally, the third intervention tried to enhance writing skills using motivational strategies, and it was applied to 66 students in the same conditions as the other samples. All the training programs were compared to a control group, who received only the ordinary curriculum. Results show that there are difficulties in training self-efficacy and attitudes towards writing, but also that different training programs provide different results in these aspects.