The campus safety committee has asked Professor Ibrahim to study bicycling on his campus. He trains two observers and has them observe the number of cyclists and their safety at various points around campus. When the observations began, the observers noticed that bicyclists slowed down when they neared the observers. How could this reactivity be avoided?
a. The observers could use random assignment.
b. The observers could use a blind study design.
c. The observers could make unobtrusive observations by hiding.
d. The observers could use a masked design.

c. The observers could make unobtrusive observations by hiding.            

Explanation:

Unobtrusive observation: In psychological research, the term unobtrusive observation is described as an observation that doesn't require the experimenter or the researcher to intrude or interfere in any of the research contexts.

Participant or direct observation needs the experimenter or the researcher to be physically present in the surrounding environment where the research is being conducted and therefore it leads the participant's to alter or change their behavior to look good in front of the experimenter or the researcher.

In the question above, the correct answer is "option c".                                  

1. senate

2.there is no diagram

3.education

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.