i'd like to share a few things i've been reading, some people may know directly what i'm implying, for others, you may be able to use the new knowledge ^_^ these are researches on motivation and goal orientation :
"achievement motivation research initially established that effort and persistence on achievement tasks are greater in people who set goals of moderate difficulty(neither too hard nor too easy for their current abilities), who seriously commit themselves to pursuing these goals rather than treat them as mere "pie-in-the-sky" hopes, and who concentrate on trying to achieve success rather than on trying to avoid failure (Dweck & Elliott, 1983)"
"Effort and persistence are greater when people perceive a continuing connection between the level of effort they invest in a task and the level of mastery that they achieve (Cooper, 1979)"
"Effort and persistence are greater when people believe that the potential to control outcomes (e.g., achieve success on the task) lies within themselves rather than in external factors that they cannot control (Stipek & Weisz, 1981; Thomas, 1980)"
"Effort and persistence are greater when people believe that they can bring about desired outcomes through their own actions (act as origins) rather than feeling that they are pawns whose fate is determined by factors beyond their control (deCharms, 1976)"
no wonder... ^_^