Multiple Choice
A clinical neuropsychologist develops a new treatment for recovery from head trauma and administers it to one half (randomly selected) of a sample of 50 people.He measures the level of cognitive functioning one month after the trauma and analyses the data in SPSS.The output of a between-participant t-test is shown below: 
Which of the following statements is true?
A) The test shows the treatment works.
B) The test shows the treatment works so long as we can rule out problems with internal validity.
C) The test shows the treatment works so long as we can rule out problems with internal validity and external validity (e.g., selection X treatment effects) .
D) The test shows that the effects of the treatment are not due to chance.
E) The test provides us with good grounds to be confident that the observed difference is not due to chance.
Correct Answer:
Verified
Correct Answer:
Verified
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