I have created an option group on a form with a series of 6 options, when an option is selected on one record, the same option is applied to all records. How can I create an option group so that when an option is selected, it only affects that one record and does not change any other records?

You need to bind the option group to a field from the form's datasource. Just set the control source for the option group to a numeric field (you might need to add one in the table's design)