Did the responder in the video use correct techniques for back blows and chest thrusts?

The responder in the video did not use the correct techniques for back blows and chest thrusts, which is why this answer is appropriate.

When applying back blows, the responder should aim to deliver firm strikes between the shoulder blades using the heel of their hand. This technique is designed to create pressure that can help dislodge an obstruction from the airway. In the case of chest thrusts, the responder should perform them with their hands positioned in the center of the person’s chest, thrusting inward and slightly upward to expel an object.

If the techniques were incorrect, it may indicate that the responder wasn't following the established guidelines for performing these techniques effectively in a choking emergency. Proper technique is crucial as it ensures maximum effectiveness in potentially life-saving situations, helping to clear the airway while minimizing the risk of injury to the choking individual.

Thus, the selection indicating that the responder’s techniques were not correct aligns with the importance of adhering to the proper methods during first aid interventions.