Final answer:
An informal form of positive feedback with regard to job performance is known as informal positive sanctions; this includes spontaneous praise and casual acknowledgments that are not officially documented.
Step-by-step explanation:
With regard to job performance, the recognition that is an informal form of positive feedback would be b. Informal positive sanctions. These can include off-the-cuff compliments, public acknowledgments in front of peers without official documentation, or a pat on the back for a job well done. Compared to formal recognition mechanisms, such as performance appraisals or written commendations, informal feedback is less structured but can be equally important for employee morale and motivation. It's important for employees to be open to feedback, as per the advice 'J', which emphasizes the need to learn from both positive and negative feedback to grow professionally.