Assuming that the performance in performing a motor or mental task can be quantitatively measured (e.g. by measuring its duration, efficiency, and quality of the outcome) I wonder if there have been systematic studies how self-observation influences these parameters.
I guess to study this influence one needs four experimental set-ups to compare to each other:
- Just ask the test person to perform the task.
- Ask her to observe herself (to be able to report what went on, afterwards).
- Ask her to think loud.
- Ask her to try not to observe herself.
My question is: Is there a canoncial paper in which such an experiment is described?
If there was a study where the influence of self-observation is measured in a multi-tasking setting ("Do this and do that at the same time and observe yourself while doing it") this would be even greater.