Adisorder in one or more of the basic psychological processes involved in understanding or using spoken or written language, which may appear as an impaired ability to listen, think, speak, read, write, spell, or do mathematical calculations is:

a punishment or the threat of punishment used to enforce conformity. enforcement of norms or shared rules of conduct that tell people how to act in specific situations. social control. not everyone internalizes all of society's norms, and some people must be motivated by self-fulfillment.

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.