A)Provide an Informal Analysis of the Following Passage;or

Short Answer

A)Provide an informal analysis of the following passage;or
B)in analyzing the passage,do the following:
a.Identify the causal hypothesis at issue.
b.Identify what kind of study it is.
c.Describe the control and experimental groups.
d.State the difference in effect (or cause)between control and experimental groups.
e.Identify any problems in either the study or the report of it,including but not necessarily limited to uncontrolled variables.
f.State the conclusion you think is warranted by the report.
A.Yesavage of Stanford University and his colleagues recruited ten experienced private pilots and trained them on a computerized flight-simulator landing task.All subjects had smoked marijuana at some time in the past,though none was a daily user.None smoked marijuana during the test period,except as required by the test.The test period began with a morning baseline flight,after which each subject smoked a marijuana cigarette containing 19 milligrams of tetrahydrocannabinol,the active agent in marijuana.The pilots repeated the landing task one,four,and twenty-four hours later.The worst performances compared with the baseline occurred one hour after smoking the cigarette.Twenty-four hours later,however,the pilots still experienced significant difficulty in aligning the computerized airplane and landing it in the center of the runway.According to the scientists,there were marked deviations from the proper angle of descent in the last six thousand feet of approach to the landing.
The amount of marijuana smoked is comparable to a strong social dose,the researchers said.
-Adapted from Science News
The men's baseline performances constitute the control group in this prospective observational study.One wonders about the pilots' attitudes:Were any out to prove a point?