Two way ANOVA.

The purpose is to determine whether arousal and valence play a role in memory. In other words, if you experience something arousing will you be more likely to remember it in comparison to experiencing an event that is not arousing? Furthermore, are you more likely to remember something that is positively valenced or negatively valenced? Finally, there may be an interaction between arousal and valence. Although there are many theories on the topic, we will not be concerned about testing them. From an empirical point of view, attempt to answer the following three questions: (1) does arousal influence recall? (2) Does valence influence recall? (3) does the arousal-valence interaction influence recall? if so what is the nature of the interaction?

The independent variables are arousal (low and high) and valence (positive and negative) giving us a completely randomized factorial. The dependent variable was the number of slides recalled. Eighty participants were randomly assigned to the four treatment combinations (20 in each condition). Participants were tested individually in a

Controlled environment that was relatively free from distractions. Participants were instructed to remember as much as they could about each slide. There were 20 slides for each treatment combination. The slides were presented in a darkened room. Each slide was presented for a 5 second duration. After the slide presentation, the lights were turned on and the participants was instructed to write as much as he/she could remember about each slide (the dependent measure)

Research Report 4

Start with describing the purpose of the study, the independent and dependent variables, a brief description of the methodology including the total number of subjects tested, the materials used (slides and pencil and paper), how the study was conducted, the results* and discussion.

*Describe the type of test, (in this case a two way ANOVA), the alpha level you set, the three Fs and degrees of freedom for each F, the exact probability for each F, and whether each F was significant. Finally, report partial eta squared for each F (this is a measure of effect size) Organize your results such that you present the overall analysis first and then follow with your interpretation of your main effects and especially your interaction. The best way to interpret your interaction is to present the Figure and then interpret it for the reader. A good way to do this is to start your interpretations by stating "As Figure 1 indicates, …." . Include your figure at the end of the research report.

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