Your name______________________

Your TA's name__________________

Your data set number______________

Lab G





An experimenter is interested in the effects of gender and repeated exposure on emotional reactions to negative stimuli. Women and men participants (A1, A2) viewed 5 visually upsetting slides for 10 seconds each; at each of the 5 slide presentations (B1-B5), the experimenter recorded muscle activity in the forebrow (corrugator supercilli muscle). In your response to the questions, use the data set assigned to you by the teaching assistant.


1. Identify the independent and dependent variables

2. State the null hypotheses in both words and symbols (interaction, words only)

3. Perform an ANOVA and present the summary table for this analysis.

4. Draw conclusions warranted by the data.