A Psychologist Was Interested in Gauging the Success of a Mood

question 13

Multiple Choice

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) .
- A discriminant function analysis was performed on the data. The output is below. Which statement best sums up the results? $$\begin{array}{l}\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Wilks' Lambda }\\\begin{array} { | l | r | r | r | r | } \hline \text { Test of Function(s) } & \begin{array} { c } \text { Wilks' } \\\text { Lambda }\end{array} & \text { Chi-square } & \text { df } & \text { Sig. } \\\hline 1 \text { through 2 } & .615 & 30.128 & 18 & .036 \\2 & .901 & 6.452 & 8 & .597 \\\hline\end{array}\end{array}$$ $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$ Eigenvalues
$\begin{array}{|l|r|r|r|r|}\hline \text { Function } & \text { Eigenvalue } & \% \text { of Variance } & \text { Cumulative } \% & \begin{array}{c}\text { Canonical } \\\text { Correlation }\end{array} \\\hline 1 & .465^{\mathrm{a}} & 80.9 & 80.9 & .563 \\2 & .110^{\mathrm{a}} & 19.1 & 100.0 & .314 \\\hline\end{array}$
a. First 2 canonical discriminant functions were used in the analysis.

• A)There were two significant underlying functions that differentiated the mood induction groups: one seems to reflect disgust, whereas the other reflects depression.
• B)There was one significant underlying function that differentiates the mood induction groups: it seems to represent disgust.
• C)There were two significant underlying functions that differentiated the mood induction groups, but it's unclear what these functions represent.
• D)There were no significant underlying functions that could discriminate the mood induction groups.

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