EN
Spontanously hypertensive rats were found to learn a visual discrimination paradigm better than Wistar normotensive rats.The present analysis of choice strategies used by rats was performed to detect possible correlates between patterns of responding and duration of learning.The following strategies were included into the analysis: perseveration and alternation of choice, win-stay lose-shift and win-shift lose-stay. A computer programme called "The Thinking Rat" was written to analyse rat strategies during the learning.The analysis was applied for two irrelevant dimensions of stimuli, i.e. position and orientation, and for colour as a relevant cue.