You do an experiment that asks how energetic do people feel

Question

Working with main effects and interactions

You do an experiment that asks: How energetic do people feel after drinking different types of soft drinks (caffeinated/high calorie, caffeinated/diet, decaffeinated/high calorie, decaffeinated/diet)?

1. What are the in dependent variables in this design?

2. State the design in a ____ × ____ format:

3. What is the dependent variable?

Some possible results are tabled below. Answer the questions related to each set of results. If it helps you to answer the questions you can draw a graph.

DV = Energy level

Average of calorie groups =

Average of no- calorie groups =

Is there a main eff ect of calories on energy level? ______

Average of caffeine groups =

Average of no- caffeine groups =

Is there a main effect of caff eine on energy level? ______

Is there a calorie × caffeine interaction? ______

DV = Energy level

Average of calorie groups =

Average of no- calorie groups =

Is there a main eff ect of calories on energy level? ______

Average of caffeine groups =

Average of no- caffeine groups =

Is there a main effect of caff eine on energy level? ______

Is there a calorie × caffeine interaction? ______

DV = Energy level

Average of calorie groups =

Average of no- calorie groups =

Is there a main eff ect of calories on energy level? ______

Average of caffeine groups =

Average of no- caffeine groups =

Is there a main effect of caff eine on energy level? ______

Is there a calorie × caffeine interaction? ______

DV = Energy level

Average of calorie groups =

Average of no- calorie groups =

Is there a main eff ect of calories on energy level? ______

Average of caffeine groups =

Average of no- caffeine groups =

Is there a main effect of caff eine on energy level? ______

Is there a calorie × caffeine interaction? ______

DV = Energy level

Average of calorie groups =

Average of no- calorie groups =

Is there a main eff ect of calories on energy level? ______

Average of caffeine groups =

Average of no- caffeine groups =

Is there a main effect of caff eine on energy level? ______

Is there a calorie × caffeine interaction? ______

DV = Energy level

Average of calorie groups =

Average of no- calorie groups =

Is there a main eff ect of calories on energy level? ______

Average of caffeine groups =

Average of no- caffeine groups =

Is there a main effect of caff eine on energy level? ______

Is there a calorie × caffeine interaction? ______