|
Methods to manipulate the mediator in a controlled experiment
Direct manipulation: The researcher can directly manipulate the mediator by providing participants with information or instructions that are designed to change their level of the mediator. For example, a researcher might provide participants with information about the benefits of exercise in order to increase their motivation to exercise.
Indirect manipulation: The researcher can indirectly manipulate the mediator by manipulating a variable that is known to be related to the mediator. For example, a researcher might increase participants' self-efficacy by providing them with training on a task, and then measure the effect of this training on their motivation to perform the task.
Naturalistic manipulation: The researcher can manipulate the mediator in a naturalistic setting by creating an environment that is conducive to change in the mediator. For example, a researcher might create a group setting where participants are encouraged to discuss their goals and to provide each other with support, in order to increase their motivation to achieve their goals.
It is important to note that the effectiveness of any particular manipulation will depend on the specific mediator that is being targeted. For example, a direct manipulation of motivation may be more effective than an indirect manipulation of self-efficacy for increasing exercise behavior.
|