Zero is defined as neither negative nor positive. Reinforcers can be positive, negative, or both. It involves a training set with both positive and negative values. Observational learning occurs through observing negative and positive behaviors. Social anhedonia is a dimension of both negative and positive schizotypy. Peace theorists often distinguish between negative and positive peace. Symptoms are described in terms of positive, negative, and cognitive symptoms. Switching states are developed for positive, negative and zero voltages. Consider a sample with 95 negative and 5 positive values. It received a mix of positive and very negative reviews. The song received positive to negative reviews. There are many examples of excessive stresses with negative consequences. Interactions often result in learners receiving negative evidence. There are concerns about negative health effects. This is especially likely to occur in regard to negative characteristics.