The initial approach to measuring individual differences in sensation was the use of absolute thresholds. In the 21st century, researchers use a more sophisticated approach that takes an observer's response bias into account. This approach is termed theory.

Signal Detection Theory

Explanation:

According to this theory, there are a number of factors that determine how a system will detect a signal and the point at which the threshold level will be pinpointed. E.g. in humans factors such as fatigue, experience, expectations can affect the applied threshold.

the answer is

a) revise existing treaties

b) do away with political alliances

c) prevent the spread of communism

d) bring an end to european colonization

the main goal of the southeast asia treaty organization was to prevent the spread of communism in southeast asia.

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.