Little or no transfer. Note that in every group all subjects learned the same task A, but they learned a different task B, depending on which group the subjects were in. Let us analyze each of these groups. Because this group was given the same stimuli and responses in both tasks, there was high positive transfer. In this group the same stimuli were used, but different responses had to be associated with them.
Negative transfer is the result.
This group was given a new task with different stimuli and with different responses. Since there is no similarity between either the stimuli or responses of the tasks, we might expect no transfer. But when there are similarities in the procedures used in each task, we often find some slight positive transfer anyway. This group has to attach an old response to a new stimulus. In this case, the two tasks have more similarity than they did for Group 3, and there is no need to unlearn responses, as Group 2 had to do.