TABLE 1.

Operational definitions of the experiment.

Initial trials	Trials that (1) was the first trial of the session, or (2) occurred after a correct response. In initial trials, the right/left placement of the two images was pseudo-random and independent from the previous trial.
Correction trials	Trials occurring after an error. In these trials, the right/left placement of the two images was repeated from the previous trial.
Trials per session	The total number of all trials (initial trials plus correction trials).
Response latency	The time between the display of the images and the screen touch (i.e., rat response) during both initial and correction trials.
Correct responses	Number of correct responses given during initial trials. Does not include correct responses given during correction trials.
Percent correct responses	Correct responses divided by initial trials.
Total errors	Total number of incorrect responses given during initial trials and correction trials.
Perseverative errors	Total number of incorrect responses given during correction trials.
Perseveration bouts	Number of times that a continuous string of 1 or more perseverative errors occurred. This was calculated by counting the number of incorrect responses given during the first correction trial following a failed initial trial. For example, if a rat answers incorrectly during an initial trial, and then answers incorrectly again during the subsequent correction trial, perseveration bouts would increment. However, after this, repeated failed correction trials for the same initial trial would not increment perseveration bouts. Perseveration bouts would only increment again if the rat responded correctly to break the correction loop, and then answered incorrectly on a different initial trial and the following correction trial.