The wave frequency of a sound is what we refer to as its _____

Dr. Kramer is asking children how often they eat pizza. Dr. Kramer's research is an example of

A) a case study. B) naturalistic observation. C) an experiment. D) self-reports.

In early childhood ________________________________

a. moral judgments tend to be based more on fear of punishment than is the case for older children b. children are not yet able to experience empathy c. children from different cultures learn the same moral rules d. children have more difficulty with perspective taking than they did earlier in development because of their stronger sense of self