Final answer:
The big problem between individuals in the research by Frank Fincham on forgiveness is lack of acceptance by the transgressor.
Step-by-step explanation:
In the research by Frank Fincham on forgiveness, the big problem between individuals (the transgressor and the person who is hurt) is lack of acceptance by the transgressor. The transgressor may not accept or agree that their actions were wrong because they see some benefit or positive outcome for themselves.
However, when the transgressor comes to understand and acknowledge why others consider their actions wrong and accepts that, they are more likely to stop engaging in those wrong acts.
This understanding and acceptance are crucial for forgiveness to occur and for reconciliation between the transgressor and the person who was hurt.