Negative reinforcement results in the extinction of previously learned behaviors

________ is a(n) understanding that basic properties of substances, such as number, mass, and volume, remain the same after a transformation changes their appearance but not the amount of the substance

a. Centration b. Conservation c. Focus on appearances d. Symbolic representation

Which sampling technique is most likely to result in a biased sample?

a. simple random sampling b. convenience sampling c. proportionate stratified random sampling d. systematic sampling