"because psychology students tend to define "negative" as "bad," students often incorrectly define "negative reinforcement" as a punishment. this illustrates which barrier to problem solving? "

This is a cultural or learned barrier to problem-solving. This is because people are taught in different ways, and information like the relationship of negative and bad is engrained at a young age, which can in turn give certain information a negative connotation even if the true meaning isn’t necessarily a negative one.

The used coins.. .