Some examples include: Some behaviorist psychologists have offered up other explanations for the undermining of intrinsic motivation that has been found in support of CET.
Similarly, rewards that are not dependent upon the task and are given freely are also not detrimental to motivation and satisfaction (Deci, Koestner, & Ryan, 1999).
Word choice can negatively influence autonomy even under conditions of positive feedback if the feedback is given in a controlling manner, such as by indicating that someone is doing a good job and that they "should" continue the work, as opposed to simply indicating that they are performing well (Deci, Koestner, & Ryan, 1999).
In their analysis of the literature, Deci et al. (1999)[14] found that while adults had their intrinsic motivation significantly enhanced by positive feedback, children showed no such difference.
This would indicate that when tangible rewards are to be used that they should not be made known beforehand (and therefore linked to the behavior) and that positive verbal feedback is only good when it is applied in a manner that does not threaten the autonomy of the individual.