Final answer:
Reinforcement for emitting a correct echoic in a child usually involves positive reinforcement. The most effective form typically involves praise and attention, as per the principles of behavioral psychology.
Step-by-step explanation:
The subject of this question falls within the realm of Psychology, specifically behavioral psychology involving concepts of reinforcement and conditioning. The grade level is most likely College, where students learn about the theories of operant conditioning by B.F. Skinner and reinforcement strategies in teaching and behavior modification.
When a child emits a correct echoic (a vocal response that matches the verbal stimulus given by another person), reinforcement is generally provided to increase the likelihood of that behavior occurring again. The most effective form of reinforcement in this context is typically positive reinforcement, which means adding a desirable stimulus to increase a behavior. Therefore, the correct answer would be B. praise and attention. This approach aligns with the principles of positive reinforcement. Letting the child escape the interaction might be seen as a negative reinforcement if the interaction is aversive to them, but commonly, responsive interaction and engagement through praise and attention are used to reinforce correct responses.