A psychologist was interested in gauging the success of a mood manipulation during one of her experiments. She had three groups of participants who underwent different types of mood induction: disgust mood induction, negative mood induction and positive mood induction. After the mood induction, participants were asked to endorse nine statements relating to their mood (on a 5-point Likert scale from 1 = disagree to 5 = agree). Which statement best sums up this part of the output?
A. I need to transform all of the items.
B. There were significant differences between the mood induction conditions on two items: ‘I am a worthless piece of scum’ and ‘Bodily fluids are nasty’.
C. There were significant differences between the mood induction conditions on three items: ‘I am a worthless piece of scum’, ‘I would never eat catfood’ and ‘Bodily fluids are nasty’.
D. We can assume homogeneity of variance because most items show non-significant effects.
Answer: A
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