American prosperity following World War II led to a majority of Americans to feel guilty that other Americans were struggling and they demanded government intervention.

the smallest percept difference in loudness (most ) individuals can perceive is 

Under this type of psychophysical measures, in general, we see an average of statistics to take care of imbalances. If you take a correct sample of a population, you should be able to draw an inference from that population; guess and motivation are considered. 

What are the most sensitive frequencies for humans?

Which does not contribute acoustic features of MAF  

Since the crossover between “hearing” and “not hearing” lies somewhere between the lowest audible level and the highest inaudible one, the “threshold” for each series may be taken as the ___ ___ between them.

Using both ascending and descending runs changes a patient’s anticipation, which sets a control for the average to find a

Every patient is like a lab rat; you have to ______ the subject so they respond in a certain way and keep them motivated.

Force per unit area (pressure change in air that occurs during vibration)

Psychophysical method that is under the experimenter’s control