The study deals with the question whether internal dimensional comparisons (comparisons of one's own achievement in a task with one's own achievement in another task) contribute to the development of task-specific self-evaluations. In an experimental study, N = 135 student subjects who had worked on two different types of tasks received manipulated achievement feedback with reference to dimensional and social comparisons. Results indicated the relevance of dimensional comparison information. Subjects scored their own ability and contentment with their result in the first type of task more positively (negatively) when they had received a better (worse) result than in the second task.